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Instruction Manual
Original Instruction Manual
Important:
Read this instruction manual carefully before putting the chain saw into operation and strictly observe the
safety regulations!
Keep this instruction manual!
http://www.dolmar.com
PS-350 S, 350 SC
PS-420 S, 420 SC
2
Thank you for purchasing a DOLMAR product!
Congratulations on choosing a DOLMAR chain saw! We are
conÞ dent that you will be satisÞ ed with this modern piece of
equipment. The PS-350, PS-420 are very handy and robust
chain saws with a new Design.
The automatic chain lubrication with variable-ß ow oil pump
and maintenance-free electronic ignition ensure trouble-free
operation, while the hand-saving anti-vibration system and
ergonomic grips and controls make work easier, safer, and
less tiring for the user. The Featherlight-Start system lets you
start the saw effortlessly with a spring-loaded starting assist.
For some countries the saw is also equipped with a catalytic
converter. This reduces the amount of pollutants in the exhaust,
and meets European Guideline 2002/88/EG.
DOLMAR chain saws PS-350, PS-420 are equipped with the
latest safety features and meet all national and international
standards. These features include: hand guards on both handles,
grip throttle lever lock, chain catch, safety saw chain, and chain
brake. The chain brake can be actuated manually, and is also
inertia-actuated automatically in case of kickback.
The following industrial property rights apply: DE 10132973, DE
20301182, DE 10202360, DE 202664012860, US 6648161, US
6814192, US 7097164, US 7033149, WO 2001077572.
In order to ensure the proper functioning and performance
of your new chain saw, and to safeguard your own per-
sonal safety, it is imperative that you read this instruction
manual thoroughly before operation. Be especially careful
to observe all safety precautions! Failure to observe these
precautions can lead to severe injury or death!
Table of contents Page
Delivery inventory ..............................................................3
Symbols ...............................................................................3
SAFETY PRECAUTIONS
General precautions .......................................................4
Protective equipment ......................................................4
Fuels / Refuelling ............................................................5
Putting into operation ......................................................5
Kickback .........................................................................6
Working behavior/Method of working ...........................6-7
Transport and storage .....................................................8
Maintenance ...................................................................8
First aid ...........................................................................8
Technical data ..................................................................... 9
Packing ................................................................................ 9
Denomination of components ......................................... 10
PUTTING INTO OPERATION
Only for models with fastening nuts on the sprocket
guard
Mounting the guide bar and saw chain .................... 11-12
Tightening the saw chain ..............................................12
Checking the chain tension ............................................13
Retightening the saw chain ...........................................13
Only for the QuickSet guide bar
Mounting the guide bar and saw chain ....................14-15
Tightening the saw chain ..............................................15
Checking the chain tension ...........................................15
Retightening the saw chain ...........................................15
Only for models with quick tensioner on sprocket guard
Mounting the guide bar and saw chain ....................16-17
Tightening the saw chain ..............................................17
Checking the chain tension ...........................................18
Retightening the saw chain ...........................................18
Chain brake ..................................................................18
Fuels ........................................................................19-20
Refuelling ......................................................................20
Checking the chain lubrication ......................................21
Adjusting the chain lubrication ......................................21
Starting the engine ........................................................22
Cold start ......................................................................22
Warm start ....................................................................22
Stopping the engine ......................................................22
Checking the chain brake .............................................23
Working in winter .............................................................23
Adjusting the carburetor ..................................................24
MAINTENANCE
Sharpening the saw chain .......................................25-26
Cleaning the inside of the sprocket guard ....................27
Cleaning the guide bar ..................................................27
Replacing the saw chain ...............................................28
Cleaning the air Þ lter .....................................................29
Replacing the spark plug ..............................................30
Checking the ignition spark ...........................................30
Checking the mufß er screws ......................................... 30
Replacing the starter cable/Replacing the return spring
cassette/Replacing the Featherlight -Start spring .........31
Mounting the fan housing .............................................31
Cleaning the air Þ lter compartment/fan compartment ... 32
Cleaning the cylinder Þ ns ..............................................32
Replacing the suction head ..........................................32
Instructions for periodic maintenance ...........................33
Service, spare parts and guarantee ................................ 34
Trouble shooting ..............................................................35
Extract from spare parts list .......................................36-37
Accessories .............................................................36-37
EU conformity declaration ............................................... 38
3
1
4
5 6 7
32
Delivery inventory
1. Chain saw
2. Guide bar
3. Saw chain
4. Chain protection cover
5. Universal wrench
6. Offset screwdriver
7. Screwdriver for carburetor adjustment
8. Instruction manual (not shown)
In case one of the parts listed should not be included in the
delivery inventory, please consult your sales agent.
Symbols
You will notice the following symbols on the saw and in the Instruction Manual:
Caution, kickback!
Chain brake
Fuel and oil mixture
Normal / Winter operation
Carburetor adjustment
Chain oil Þ ll/oil pump
Saw chain oil
adjustment screw
First aid
Recycling
CE - Marking
Read instruction manual and
follow the warning- and safety
precautions!
Particular care
and caution!
Forbidden!
Wear protective helmet,
eye and ear protection!
Wear protective
gloves!
No smoking!
No open Þ re!
Stop engine!
Start engine
Combination switch,
Choke ON/STOP
Safety position
4
4
5
6
7
1
2
3
1
4
3
2
SAFETY PRECAUTIONS
Intended use
Power chain saws
This power chain saw may be used only for sawing wood out of doors.
It is intended for the followung uses depending on its class:
- Professional and mid-class: Use on small, medium and large
trees: felling, limb removal, cutting to length, thinning.
- Hobbyklasse: Occasional use on small trees, fruit-tree care,
felling, limb removal, cutting to length.
Unauthorised users:
Persons who are not familiar with the Instruction Manual, children,
young people, and persons under the inß uence of drugs, alcohol
or medication must not use this saw.
General precautions
- To ensure correct operation the user has to read this instruc-
tion manual to make himself familiar with the charac teristics
of the chain saw. Users insufÞ ciently informed will endanger
themselves as well as others due to improper handling.
- It is recommended to lend the chain saw only to people who
are experienced in working with chain saws. Always hand over
the instruction manual.
- First users should ask the dealer for basic instructions to become
familiarized with the characteristics of engine powered sawing
or even attend a recognized course of instruction.
- Children and young persons aged under 18 years must not be
allowed to operate the chain saw. Persons over the age of 16
years may, however, use the chain saw for the purpose of being
trained as long as they are under the supervision of a qualiÞ ed
trainer.
- Use chain saws always with the utmost care and attention.
- Operate the chain saw only if you are in good physical condition.
If you are tired, your attention will be reduced. Be especially
careful at the end of a working day. Perform all work calmly and
carefully. The user has to accept liability for others.
- Never use the chain saw after having consumed alcohol, drugs
or medication.
- A Þ re extinguisher must be available in the immediate vicinity
when working in easily inß ammable vegetation or when it has
not rained for a long time (danger of Þ re).
Protective equipment
- In order to avoid head, eye, hand or foot injuries as well as
to protect your hearing the following protective equipment
must be used during operation of the chain saw:
- The kind of clothing should be appropriate, i. e. it should be
tight-Þ tting but not be a hindrance. Do not wear jewellery
or clothing which could become entangled with bushes or
shrubs. If you have long hair, always wear a hairnet!
- It is necessary to wear a protective helmet whenever working
with the chain saw. The protective helmet (1) is to be checked
in regular intervals for damage and is to be replaced after 5
years at the latest. Use only approved protective helmets.
- The face shield (2) of the protective helmet (or the goggles)
protects against sawdust and wood chips. During operation of
the chain saw always wear a goggle or a face shield to prevent
eye injuries.
- Wear adequate noise protection equipment (ear muffs (3),
ear plugs, etc.). Octave brand analysis upon request.
- The safety jacket (4) is provided with special signal-coloured
shoulder straps and is comfortable and easy to care for.
- The protective brace and bib overall (5) is made of a nylon
fabric with 22 layers and protects against cuts. We strongly
recommend its use.
- Protective gloves (6) made of thick leather are part of the
prescribed equipment and must always be worn during
operation of the chain saw.
- During operation of the chain saw safety shoes or safety
boots (7) Þ tted with anti skid sole, steel toe caps and pro-
tection for the leg must always to be worn. Safety shoes
equipped with a protective layer provide protection against
cuts and ensure a secure footing.
5
S
TO
P
O
N
STOP
ON
6
5
7
9
8
Fuels / Refuelling
- Stop the engine before refuelling the chain saw.
- Do not smoke or work near open Þ res (5).
- Let the engine cool down before refuelling.
- Fuels can contain substances similar to solvents. Eyes and skin
should not come in contact with mineral oil products. Always wear
protective gloves when refuelling. Frequently clean and change
protective clothes. Do not breathe in fuel vapors. Inhalation of
fuel vapours can be hazardous to your health.
- Do not spill fuel or chain oil. When you have spilt fuel or oil im-
mediately clean the chain saw. Fuel should not come in contact
with clothes. If your clothes have come in contact with fuel,
change them ot once.
- Ensure that no fuel or chain oil oozes into the soil (environmental
protection). Use an appropriate base.
- Refuelling is not allowed in closed rooms. Fuel vapors will ac-
cumulate near the ß oor (explosion hazard).
- Ensure to Þ rmly tighten the screw plugs of the fuel and oil tanks.
- Change the place before starting the engine (at least 3 m from
the place of refuelling) (6).
- Fuel cannot be stored for an unlimited period of time. Buy only
as much as will be consumed in the near future.
- Use only approved and marked containers for the transport and
storage of fuel and chain oil. Ensure children have no access to
fuel or chain oil.
Putting into operation
- Do not work on your own. Another person must be nearby
in case of emergencies (within shouting distance).
- Ensure that there are no children or other people within the
working area. Pay attention to any animals in the working area,
as well (7).
- Before starting work the chain saw must be checked for
perfect function and operating safety according to the pre-
scriptions.
Check especially the function of the chain brake, the correct
mounting of the guide bar, the correct sharpening and tighten-
ing of the chain, the Þ rm mounting of the sprocket guard, the
easy motion of the throttle lever and the function of the throttle
lever lock, the cleanliness and dryness of the handles, and the
function of the ON/OFF switch.
- Put the chain saw only into operation if it is completely assembled.
Never use the chain saw when it is not completely assembled.
- Before starting the chain saw ensure that you have a safe footing.
- Put the chain saw into operation only as described in this instruc-
tion manual (8). Other starting methods are not allowed.
- When starting the chain saw it must be well supported and
securely held. The guide bar and chain must not be in contact
with any object.
- When working with the chain saw always hold it with both
hands. Take the back handle with the right hand and the tubu-
lar handle with the left hand. Hold the handles tightly with your
thumbs facing your Þ ngers.
- CAUTION: When releasing the throttle lever the chain will
keep on running for a short period of time (free-wheeling).
- Continuously ensure that you have a safe footing.
- Hold the chain saw such that you will not breathe in the exhaust
gas. Do not work in closed rooms (danger of poisoning).
- Switch off the chain saw immediately if you observe any
changes in its operating behavior.
- The engine must be switched off before checking the chain
tension, tightening the chain, replacing it or clearing mal-
functions (9).
- When the sawing device is hit by stones, nails or other hard
objects, switch off the engine immediately and check the
sawing device.
- When stopping work or leaving the working place switch off the
chain saw (9) and put it down such that nobody is endangered.
CAUTION: Do not put the overheated power chain
saw in dry grass or on any inß ammable objects.
The mufß er is very hot (danger of Þ re).
- CAUTION: Oil dropping from the chain or guide bar after hav-
ing stopped the saw chain will pollute the soil. Always use an
appropriate base.
Maintenance Stopping work
Refuelling Transport
Sharpening the chain Putting out of function
3 Meter
6
10
12
13
14
11
Kickback
- When working with the chain saw dangerous kickbacks may
occur.
- Kickback occurs when the upper part of the end of the guide
bar inadvertently touches wood or other hard objects (10).
- This causes the saw to be thrown back toward the user with
great force and out of control. Risk of injury!
In order to prevent kickback, follow these rules:
- Only specially-trained persons should perform plunge cuts, i.e.,
piercing timber or wood with the tip of the saw!
- Never apply the end of the bar when starting to make a cut.
- Always observe the end of the guide bar. Be careful when
continuing an already started cut.
- When starting to cut the chain must be running.
- Ensure that the chain is always sharpened correctly. Pay special
attention to the height of the depth limiter.
- Never cut several branches at the same time. When cutting a
branch ensure that no other branch is touched.
- When crosscutting a trunk be aware of the trunks next to it.
Working behavior/Method of working
- Only use the chain saw during good light and visibility periods.
Be aware of slippery or wet areas, and of ice and snow (risk of
slipping). The risk of slipping is extremely high when working
on recently peeled wood (bark).
- Never work on unstable surfaces. Make sure that there are no
obstacles in the working area, risk of stumbling. Always ensure
that you have a safe footing.
- Never saw above your shoulder height (11).
- Never saw while standing on a ladder (11).
- Never climb up into trees to perform sawing with the chain
saw.
- Do not work leaning too far over.
- Guide the chain saw in such a way that no part of your body is
within the elongated swivelling range of the saw (12).
- Use the chain saw for sawing wood only.
- Avoid touching the ground with the chain saw while it is still
running.
- Never use the chain saw for lifting up or removing pieces of
wood or other objects.
- Remove foreign objects such as sand, stones and nails found
within the working area. Foreign objects may damage the saw-
ing device and can cause dangerous kickback.
- When sawing precut timber use a safe support (sawing jack,
13). Do not steady the workpiece with your foot, and do not
allow anyone else to hold or steady it.
- Secure round pieces against rotation.
- For cutting down trees or performing crosscuts the spike
bar (13, Z) must be applied to the wood to be cut.
- Before performing a crosscut Þ rmly apply the spike bar to the
timber, only then can the timber be cut with the chain running.
For this the chain saw is lifted at the back handle and guided
with the tubular handle. The spike bar serves as a centre of
rotation. Continue by slightly pressing down the tubular handle
and simultaneously pulling back the chain saw. Apply the spike
bar a little bit deeper and once again lift the back handle.
- When the timber must be pierced for cutting or longitudi-
nal cuts are to be performed it is urgently recommended
to have this carried out by specially trained persons only
(high risk of kickback).
- Do longitudinal - lengthwise - cuts at the lowest possible
angle (14). Be very careful when doing this type of cut, as the
spike bar cannot grip.
- The saw must be running whenever you remove the chain saw
from the wood.
- When performing several cuts the throttle lever must be released
in between.
7
B
A
B
15
16
17
18
19
45
o
45
o
2
1
/2
- Be careful when cutting splintery wood. Cut pieces of wood
may be pulled along (risk of injuries).
- When cutting with the upper edge of the guide bar, the chain
saw may be pushed in the direction of the user if the chain
gets clamped. For this reason use the lower edge of the bar
whenever possible. The chain saw will then be pushed away
from you (15).
- If the timber is under tension (16), Þ rst cut the pressure side
(A). Then the crosscut can be performed on the tension side
(B). Thus clamping of the guide bar can be avoided.
CAUTION:
People felling trees or cutting of branches must be specially
trained. High risk of injuries!
- When cutting of branches, the chain saw should be supported
on the trunk. Do not use the end of the bar for cutting (risk of
kickback).
- Be aware of branches under tension. Do not cut free branches
from below.
- Never perform detensioning cuts while standing on the trunk.
- Before cutting down a tree ensure that
a) only those people are within the working area which are
actually involved in cutting down the tree.
b) every worker involved can withdraw without stumbling (the
people should withdraw backwards in a diagonal line, i. e.
at a degree of 45°).
c) the bottom part of the trunk is free from foreign objects,
underbrush and branches. Make sure to have a safe footing
(risk of stumbling).
d) the next working place is at least 2 1/2 tree lengths away
(17). Before cutting down the tree check the direction of fall
and make sure that there are neither people nor objects
within a distance of 2 1/2 tree lengths.
- Judging the tree:
Direction of hanging - loose or dry branches - height of the tree
- natural overhang - is the tree rotten?
- Take into account the direction and speed of the wind. If strong
gusts are occurring, do not do any felling.
- Cutting the roots:
Start with the strongest root. First do the vertical and then the
horizontal cut.
- Notching the trunk (18, A):
The notch determines the direction of fall and guides the tree.
The trunk is notched perpendicular to the direction of fall and
penetrates 1/3 -1/5 of the trunk diameter. Perform the cut near
the ground.
- When correcting the cut, always do so over the whole width of
the notch.
- Cut down the tree (19, B) above the bottom edge of the notch
(D). The cut must be exactly horizontal. The distance between
both cuts must be approx. 1/10 of the trunk diameter.
- The material between both cuts (C) serves as a hinge. Never
cut it through, otherwise the tree will fall without any control.
Insert felling wedges in time.
- Secure the cut only with wedges made of plastic or aluminium.
Do not use iron wedges. If the saw hits an iron wedge the chain
can be seriously damaged or torn.
- When cutting down a tree always stay sidewards of the falling
tree.
- When withdrawing after having performed the cut, be alert for
falling branches.
- When working on sloping ground the user of the chain saw
must stay above or sidewards of the trunk to be cut or the tree
already cut down.
- Be alert for trunks which may roll towards you.
= cutting down area
8
20
21
22
23
NOTE
Individuals with poor circulation who are exposed to excessive
vibration may experience injury to blood vessels or the nervous
system.
Vibration may cause the following symptoms to occur in the
Þ ngers, hands or wrists: ”Falling asleep” (numbness), tingling,
pain, stabbing sensation, alteration of skin colour or of the skin.
If any of these symptoms occur, see a physician!
SERVICE
Transport and storage
- When changing your location during work switch off the
chain saw and actuate the chain brake in order to prevent
an inadvertent start of the chain.
- Never carry or transport the chain saw with the chain run-
ning.
When the saw is hot, do not cover it (with a tarp, blanket,
newspaper or the like).
Let the saw cool down before putting it in a storage case
or vehicle. Saws with catalytic converter take longer to
cool down!
- When transporting the chain saw over long distances the guide
bar protection cover (delivered with the chain saw) must be
applied.
- Carry the chain saw with the tubular handle. The guide bar
points backwards (20). Avoid coming in contact with the mufß er
(danger of burns).
- Ensure safe positioning of the chain saw during car trans-
portation to avoid fuel or chain oil leakage.
- Store the chain saw safely in a dry place. It must not be stored
outdoors. Keep the chain saw away from children.
- Before storing the chain saw over a long period of time or ship-
ping it the fuel and oil tanks must be completely emptied.
Maintenance
- Before performing maintenance work switch off the chain
saw (21) and pull out the plug cap.
- Before starting work always check the operating safety of the
chain saw, in particular the function of the chain brake. Make
sure that the chain is always sharpened and tightened cor-
rectly (22).
- Operate the chain saw only at a low noise and emission level.
For this ensure the carburetor is adjusted correctly.
- Regularly clean the chain saw.
- Regularly check the tank cap for tightness.
Observe the accident prevention instructions issued by
trade associations and insurance companies. Do not
perform any modiÞ cations on the chain saw. You will put
your safety at risk.
Perform only the maintenance and repair works described in
the instruction manual. All other work must be carried out by
DOLMAR Service.
Use only original DOLMAR spare parts and accessories.
Using spare parts other than original DOLMAR parts or ac-
cesories and guide bar/chain combinations or lengths which
are not approved bring a high risk of accidents. We cannot
accept any responsibility for accidents and damage resulting
from using sawing devices or accesories which have not been
approved.
First aid
For the event of a possible accident, please make sure that a
Þ rst aid kit is always immediately available close by. Immediately
replace any items used from the Þ rst aid box.
When calling for help, give the following information:
- Place of the accident
- What happened
- Number of injured people
- Kind of injuries
- Your name!
9
Stroke volume cm
3
34,7 42,4
Bore mm 38 42
Stroke mm 30,6 30,6
Max. power at speed kW / 1/min 1,7 / 9.500 2,2 / 9.500
Max. torque at speed Nm / 1/min 2,1 / 6.500 2,6 / 6.500
Idling speed / max. engine speed with bar and chain 1/min 2.800 / 13.500 2.800 / 13.500
Clutch engagement speed 1/min 5.100 5.100
Sound pressure level at the workplace L
pA, eq
per ISO 22868
1) 3)
dB(A) 100,8 / K
pA
= 2,5 100,8 / K
pA
= 2,5
Sound power level L
WA, eq
per ISO 22868
1) 3)
dB(A) 110 / K
WA
= 2,5 110 / K
WA
= 2,5
Vibration acceleration a
hv, eq
per ISO 22867
1) 3)
- Tubular handle m/s
2
4,3 / K = 2,0 3,6 / K = 2,0
- Rear handle m/s
2
3,6 / K = 2,0 3,2 / K = 2,0
Carburetor Type Membranecarburetor
Ignition system Type electronic
Spark plug Type NGK CMR7A-5
or spark plug Type --
Electrode gap mm 0,5
Fuel consumption at max. load per ISO 7293 kg/h 0,79 0,96
SpeciÞ c consumption at max. load per ISO 7293 g/kWh 526 480
Fuel tank capacity l 0,48
Chain oil tank capacity I 0,28
Mixture ratio (fuel/two-stroke oil)
- when using DOLMAR oil 50 : 1 / 100: 1 (HP-100)
- when using Aspen Alkylat (two-stroke fuel) 50 : 1 (2%)
- when using other oils 50 : 1 (quality grade: JASO FC or ISO EGD)
Chain brake engages manually or in case of kickback
Chain speed (at max. power) m/s 18,1 18,3
Sprocket pitch inch 3/8 .325
Number of teeth Z 6 7
Chain type see the Extract from the spare-parts list
Pitch / gauge inch / (mm) 3/8 / 0,050 (1,3) .325 / 0,050 (1,3)
Guide bar, length of a cut cm 30, 35, 40 33, 38, 45
Guide-bar type see the Extract from the spare-parts list
Weight (fuel tank empty, without chain, guide bar and accessories) kg 4,8 / 4,9
2)
4,8 / 4,9
2)
1)
Figures derived in equal part from idling, full-load and racing speed.
2)
Models with catalytic converter (PS-350 SC, PS-420 SC).
3)
Uncertainty (K=).
Technical data
PS-350 S, 350 SC PS-420 S, 420 SC
Packing
Your DOLMAR chain saw comes delivered in a protective cardboard box to protect against shipping damage.
Cardboard is a basic raw material and is consequently reuseable or suitable for recycling (waste paper recycling).
10
1 Handle
2 Cover
3 Hood lock
4 Tubular handle
5 Hand guard (release for chain brake)
6 Mufß er
7 Spike bar
8 Chain tensioning screw
9 Retaining nuts
10 Chain catch
11 Sprocket guard
12 Adjusting screw for oil pump (bottom side)
13 Fuel pump (Primer)
14 IdentiÞ cation plate
IdentiÞ cation plate (14)
Indicate when ordering spare parts!
Serial number
Year of manufacture
Denomination of components
15 Starter grip
16 Combination switch (Choke / ON / Stop)
17 Fuel pump (Primer)
18 Throttle lever
19 Safety locking button
20 Rear hand guard
21 Fuel tank cap
22 Adjusting screws for carburetor
23 Fan housing with starting assembly
24 Oil tank cap
25 Chain (Blade)
26 Guide bar
27 Sprocket guard quick tensioner
DOLMAR PS-420 S
2011 123456
000.000.001 Typ 195
DOLMAR GmbH, 22045 Hamburg, Germany
2
26 25
1615
18
17
19
3
4
1
6
7
5
8
9
1112
20212324
101314
27
22
11
5 7
6 5 4
1
2
3
Put on the guide bar (7). Make sure that the pin (5) of the chain
tensioner engages in the hole in the guide bar.
Mounting the guide bar and saw chain
Use the universal wrench delivered with the chain saw for the
following work.
Put the chain saw on a stable surface and carry out the following
steps for mounting the guide bar and saw chain:
Release the chain brake by pulling the hand guard (1) in direc-
tion of arrow.
Unscrew retaining nuts (2).
Pull off the sprocket guard (3).
PUTTING INTO OPERATION
Only for models with fastening nuts
on the sprocket guard
CAUTION:
Before doing any work on the guide bar or chain, always
switch off the engine and pull the plug cap off the spark
plug (see „Replacing the spark plug“). Always wear protec-
tive gloves!
CAUTION:
Start the chain saw only after having assembled it com-
pletely and inspected.
Turn chain tensioning screw (4) to the left (counter-clockwise)
until the pin (5) of the chain tensioner is underneath the threaded
pin (6).
12
2
4
9 11
2
12
3
8
10
9
Replace the sprocket guard (3).
IMPORTANT:
Lift the saw chain over the chain catcher (12).
Tighten the nuts (2) only hand-tight to begin with.
Lift the chain (9) over the sprocket (8).
CAUTION:
Do not insert the chain between the chain sprocket and the
disc.
Guide the chain from above about halfway into the groove (10)
on the guide bar.
CAUTION:
Note that the cutting edges along the top of the chain must
point in the direction of the arrow!
Tightening the saw chain
Turn the chain tensioning screw (4) to the right (clockwise) until
the saw chain catches in the groove on the lower side of the
guide bar (see circle).
Slightly lift the end of the guide bar and turn the chain adjusting
screw (4) to the right (clockwise) until the chain rests against
the bottom side of the guide bar.
While still holding up the tip of the guide bar, tighten the retaining
nuts (2) with the universal wrench.
Pull the chain (9) around the sprocket nose (11) of the guide
bar in the direction of the arrow.
13
STOP
2
4
Checking the chain tension
The tension of the chain is correct if the chain rests against
the bottom side of the guide bar and can still be easily turned
by hand.
While doing so the chain brake must be released.
Check the chain tension frequently - new chains tend to get
longer during use!
When checking the chain tension the engine must be switched
off.
NOTE:
It is recommended to use 2-3 chains alternatively.
In order to guarantee uniform wear of the guide bar the bar
should be turned over whenever replacing the chain.
Retightening the saw chain
Loosen the nuts (2) about one turn with the universal wrench.
Raise the tip of the guide bar a little and turn the chain tensioning
screw (4) to the right (clockwise) until the saw chain is again up
against the bottom edge of the guide bar (see circle).
While keeping the tip of the guide bar raised, tighten the nuts
(2) again with the universal wrench.
14
5
7
6
1
2
3
5 4
Lift the chain (6) over the sprocket (5).
CAUTION:
Do not insert the chain between the chain sprocket and the
disc.
Guide the chain from above about halfway into the groove (7)
on the guide bar.
CAUTION:
Note that the cutting edges along the top of the chain must
point in the direction of the arrow!
Mounting the guide bar and saw chain
Use the universal wrench delivered with the chain saw for the
following work.
Put the chain saw on a stable surface and carry out the following
steps for mounting the guide bar and saw chain:
Release the chain brake by pulling the hand guard (1) in direc-
tion of arrow.
Unscrew retaining nuts (2).
Pull off the sprocket guard (3).
Only for the QuickSet guide bar
CAUTION:
Before doing any work on the guide bar or chain, always
switch off the engine and pull the plug cap off the spark
plug (see „Replacing the spark plug“). Always wear protec-
tive gloves!
CAUTION:
Start the chain saw only after having assembled it com-
pletely and inspected.
Put the guide bar (4) on and push it against the sprocket (5).
On QuickSet guide bars the chain is tensioned using a toothed rack in the bar. This simpliÞ es retensioning of the chain.
These models do not have a conventional chain tensioner. QuickSet guide bars are identiÞ ed by this symbol:
15
6 8
2
9
3
2 10
STOP
Pull the chain (6) around the sprocket nose (8) of the guide
bar in the direction of the arrow.
Replace the sprocket guard (3).
IMPORTANT:
Lift the saw chain over the chain catcher (9).
Tighten the nuts (2) only hand-tight to begin with.
Tensioning the saw chain
Turn the QuickSet chain tensioner (10) to the right (clockwise)
using the combination tool, until the saw chain guide elements
engage in the guide groove on the bottom of the guide bar (if
necessary, pull the chain into position slightly).
Raise the tip of the guide bar slightly and turn the chain tensioner
(10) further until the saw chain is ß ush against the bottom of the
guide bar (see circle).
While still holding up the tip of the guide bar, tighten the retaining
nuts (2) with the universal wrench.
NOTE: If the guide bar has been turned over, turn the chain
tensioner to left (i.e. counter-clockwise) to tighten the chain.
Checking the chain tension
The tension of the chain is correct if the chain rests against
the bottom side of the guide bar and can still be easily turned
by hand.
While doing so the chain brake must be released.
Check the chain tension frequently - new chains tend to get
longer during use!
When checking the chain tension the engine must be switched
off.
NOTE: It is recommended to use 2-3 chains alternatively.
In order to guarantee uniform wear of the guide bar the bar
should be turned over whenever replacing the chain.
Retensioning the saw chain
Use the combination tool to loosen the fastening nuts (2)
about one turn. Raise the tip of the guide bar slightly and turn
the QuickSet chain tensioner (10) to the right (clockwise) until
the saw chain is again ß ush against the bottom of the guide
bar (see circle).
While still holding up the tip of the guide bar, tighten the retaining
nuts (2) with the universal wrench.
16
1
2
3
4
7
9
8
6 5
Mounting the guide bar and saw chain
Place the saw on a stable surface and perform the following
work steps in order to install the guide bar and saw chain:
Release the chain brake by pulling the hand guard (1) in direc-
tion of arrow.
Fold up the sprocket guard quick tensioner (2) (see also the
illustration on tensioning the saw chain).
Push the sprocket guard quick tensioner in forcefully against
the spring tension and slowly turn counter-clockwise, until
you feel it engage. Keep pushing, and turn as far as possible
counter-clockwise.
Release the sprocket guard quick tensioner again and turn
clockwise to bring it back to its original position. Repeat this
procedure until the sprocket guard (4) is unscrewed.
Remove the sprocket guard (4).
Lift the chain (8) over the sprocket (7).
CAUTION:
Do not insert the chain between the chain sprocket and the
disc.
Guide the chain from above about halfway into the groove (9)
on the guide bar.
CAUTION:
Note that the cutting edges along the top of the chain must
point in the direction of the arrow!
Put the guide bar (5) on and push it against the sprocket (6).
Only for models with quick tensioner
on sprocket guard
CAUTION:
Before doing any work on the guide bar or chain, always
switch off the engine and pull the plug cap off the spark
plug (see „Replacing the spark plug“). Always wear protec-
tive gloves!
CAUTION:
Start the chain saw only after having assembled it com-
pletely and inspected.
17
8 10
12
11
4
3
2
15
Pull the chain (8) around the sprocket nose (10) of the guide
bar in the direction of the arrow.
Line up the holes in the sprocket guard (4) with the pins (11).
Turn the chain tensioning screw (B/3) to get the chain tension-
ing pin (12) aligned with the hole in the guide bar.
Push the sprocket guard (4) onto the pin (11).
Tightening the saw chain
Simultaneously push in hard on the sprocket guard quick ten-
sioner (2) and turn it clockwise to screw the sprocket guard on,
but do not yet tighten it.
Raise the tip of the guide bar slightly and turn the chain tensioner
(3) clockwise until the saw chain is ß ush against the bottom of
the guide bar (see circle).
Push the sprocket guard quick tensioner (2) in again and tight-
en by turning clockwise.
Release the sprocket guard chain tensioner until it turns freely,
then fold it in between protective ribs (15) as shown in the il-
lustration.
18
12
1
Checking the chain tension
The tension of the chain is correct if the chain rests against
the bottom side of the guide bar and can still be easily turned
by hand.
While doing so the chain brake must be released.
Check the chain tension frequently - new chains tend to get
longer during use!
When checking the chain tension the engine must be switched
off.
NOTE: It is recommended to use 2-3 chains alternatively.
In order to guarantee uniform wear of the guide bar the bar
should be turned over whenever replacing the chain.
Retensioning the saw chain
All that is necessary to retension the saw chain is to loosen the
quick tensioner (2) slightly as described under “Mounting the
guide bar and saw chain”.
Tension the chain as already described.
STOP
2
Engaging the chain brake (braking)
If the kickback is strong enough the sudden acceleration of the
guide bar combined with the inertia of the hand guard (1) will
automatically actuate the chain brake.
To engage the chain brake manually, simply push the hand
guard (1) forward (towards the tip of the saw) with your left
hand (arrow 1).
Releasing the chain brake
Pull the hand guard (1) towards you (arrow 2) until you feel it
catch. The brake is now released.
Chain brake
The PS-350 / PS-420 comes with an inertia chain brake as
standard equipment. If kickback occurs due to contact of the
guide-bar tip with wood (see SAFETY PRECAUTIONS, page 6),
the chain brake will stop the chain through inertia if the kickback
is sufÞ ciently strong.
The chain will stop within a fraction of a second.
The chain brake is installed to block the saw chain before
starting it and to stop it immediately in case of an emer-
gency.
IMPORTANT: NEVER run the saw with the chain brake acti-
vated (except for testing, see “Testing chain brake”)! Doing so
can very quickly cause extensive engine damage!
ALWAYS release the chain brake
before starting the work!
19
100:1
+
Gasoline
50:1
50:1
1000 cm
3
(1 litre) 20 cm
3
20 cm
3
10 cm
3
5000 cm
3
(5 litres) 100 cm
3
100 cm
3
50 cm
3
10000 cm
3
(10 litres) 200 cm
3
200 cm
3
100 cm
3
Chain oil
Use an oil with adhesive additive for lubricating the chain and
guide bar. The adhesive additive prevents the oil from being
ß ung off the chain too quickly.
We recommend the use of chain oil which is bio-degradable in
order to protect the environment. The use of bio-degradable oil
may even be required by local regulations.
The chain oil BIOTOP sold by DOLMAR is made of special
vegetable oils and is 100% bio-degradable. BIOTOP has been
granted the „blue angel“ (Blauer Umweltschutz-Engel) for being
particularly environment-friendly (RAL UZ 48).
BIOTOP chain oil is available in the following sizes:
1 l order number 980 008 210
5 l order number 980 008 211
20 l order number 980 008 213
Bio-degradable oil is stable only for a limited period of
time. It should be used within 2 years from the date of
manufacture (printed on the container).
Fuel
CAUTION:
This saw is powered by mineral-oil products (gasoline and
oil).
Be especially careful when handling gasoline.
Avoid all ß ame or Þ re. Do not smoke (explosion hazard).
Fuel mixture
This tool is powered by a high-performance air-cooled two-
stroke engine. It runs on a mixture of gasoline and two-stroke
engine oil.
The engine is designed for unleaded regular gasoline with a min.
octane value of 91 ROZ. In case no such fuel is available, you
can use fuel with a higher octane value. This will not affect the
engine.
In order to obtain an optimum engine output and to protect
your health and the environment use unleaded fuel only.
To lubricate the engine, use a synthetic oil for two-stroke air-
cooled engines (quality grade JASO FC or ISO EGD), which
has to be added to the fuel. The engine has been designed for
use of DOLMAR HP 100 high-performance two-stroke engine oil
and a mixture ratio of only 100:1 to protect the environment. In
addition, a long service life and reliable operation with a minimum
emission of exhaust gases are ensured.
DOLMAR HP 100 high-performance two-stroke engine oil is avail-
able in the following sizes:
0,5 l order number 980 008 109
DOLMAR high-performance two-stroke engine oil is available in
the following sizes to suit your individual requirements:
1 l order number 980 008 107
100 ml order number 980 008 106
In case DOLMAR high-performance two-stroke engine oil is not
available, it is urgently recommended to use a mixture ratio of 50:1
with other two-stroke engine oils, as otherwise optimum operation
of the engine cannot be guaranteed.
Caution: Do not use ready-mixed fuel from petrol sta-
tions.
The correct mixture ratio:
50:1 when using DOLMAR high-performance two-stroke engine
oil, i. e. mix 50 parts gasoline with 1 part oil.
100:1 when using DOLMAR HP 100 high-performance two-stroke
engine oil, i. e. mix 100 parts gasoline with 1 part oil.
50:1 when using other synthetic two-stroke engine oils
(quality grade JASO FC or ISO EGD), i. e. mix 50 parts
gasoline with 1 part oil.
NOTE: For preparing the fuel-oil mixture Þ rst mix the entire oil
quantity with half of the fuel required, then add the remaining
fuel. Thoroughly shake the mixture before Þ lling it into the chain
saw tank.
It is not wise to add more engine oil than speciÞ ed
to ensure safe operation. This will only result in a
higher production of combustion residues which
will pollute the environment and clog the exhaust
channel in the cylinder as well as the mufß er. In ad-
dition, fuel consumption will rise and performance
will decrease.
The Storage of Fuel
Fuels have a limited storage life. Fuel and fuel mixtures
age through evaporation, especially at high tempera-
tures. Aged fuel and fuel mixtures can cause starting
problems and damage the engine.Purchase only that
amount of fuel, which will be consumed over the next
few months. At high temperatures, once fuel has been
mixed it should be used up in 6-8 weeks.
Store fuel only in proper containers, in dry, cool,
secure locations!
AVOID SKIN AND EYE CONTACT
Mineral oil products degrease your skin. If your skin
comes in contact with these substances repeatedly and
for an extended period of time, it will desiccate. Various
skin deseases may result. In addition, allergic reactions
are known to occur.
Eyes can be irritated by contact with oil. If oil comes into
your eyes, immediately wash them with clear water. If your
eyes are still irritated, see a doctor immediately!
20
Refuelling
FOLLOW THE SAFETY PRECAUTIONS!
Be careful and cautious when handling fuels.
The engine must be switched off!
Thoroughly clean the area around the caps, to prevent dirt from
getting into the fuel or oil tank.
Unscrew the tank cap (use the universal wrench if necessary,
see illustration) and Þ ll tank with fuel mixture or saw chain oil
up to the bottom edge of the Þ lling neck. Be careful not to spill
fuel or chain oil!
Screw on the tank cap by hand all the way.
Clean the tank cap and the area around the tank after
refuelling.
Lubricating the chain
During operation there must always be sufÞ cient chain oil in the
chain-oil tank to provide good chain lubrication. At medium oil
feed rate, the oil tank holds enough for one fuel tank’s worth
of operation. During this procedure check whether there is
enough the chain oil in the tank and reÞ ll if necessary. Do this
only with the engine turned off! Screw on the tank cap by
hand all the way.
waste oil
NEVER USE WASTE OIL
Waste oil is very dangerous for the environment.
Waste oil contains high amounts of carcinogenic substances.
Residues in waste oil result in a high degree of wear and tear
at the oil pump and the sawing device.
In case of damage caused by using waste oil or unappropriate
chain oil the product guarantee will be null and void.
Your salesman will inform you about the use of chain oil.
AVOID SKIN AND EYE CONTACT
Mineral oil products degrease your skin. If your skin comes in
contact with these substances repeatedly and for an extended
period of time, it will desiccate. Various skin deseases may result.
In addition, allergic reactions are known to occur.
Eyes can be irritated by contact with oil. If oil comes into your
eyes, immediately wash them with clear water.
If your eyes are still irritated, see a doctor immediately!
Important note on bio-degradable chain oils
If you are not planning to use the saw again for an ex-
tended period of time, empty the oil tank and put in a
small amount of regular engine oil (SAE 30), and then
run the saw for a time. This is necessary to ß ush out all
remaining bio-degradable oil from the oil tank, oil-feed
system, chain and guide bar, as many such oils tend to
leave sticky residues over time, which can cause damage
to the oil pump or other parts.
The next time you use the saw, Þ ll the tank with BIOTOP
chain oil again. In case of damage caused by using waste
oil or unappropriate chain oil the product guarantee will be
null and void.
Your salesman will inform you about the use of chain oil.
chain oil
fuel/oil mixture
21
2 3
1
+
-
Checking the chain lubrication
Never work with the chain saw withoute sufÞ cient chain lubri -
ca tion. Otherwise the service life of the chain and guide bar
will be reduced. Before starting work check the oil level in the
tank and the oil feed.
Check the oil feed rate as described below:
Start the chain saw (see „Starting the engine”).
Hold the running chain saw approx. 15 cm above a trunk or the
ground (use an appropriate base).
If the lubrication is sufÞ cient, you will see a light oil trace be-
cause oil will be ß ung off the sawing device. Pay attention to the
direction the wind is blowing and avoid unnecessary exposure
to the oil spray!
Note:
After the saw has been turned off it is normal for residual chain
oil to drip from the oil feed system, the guide bar and the chain
for a time. This does not constitute a defect!
Place the saw on a suitable surface.
To ensure troublefree operation of the oil pump the oil guide
groove at the crank case (2) and the oil inlet bore in the guide
bar (3) must be cleaned regularly.
Note:
After the saw has been turned off it is normal for residual chain
oil to drip from the oil feed system, the guide bar and the chain
for a time. This does not constitute a defect!
Place the saw on a suitable surface.
Adjusting the chain lubrication
The engine must be switched off!
You can adjust the oil pump feed rate with the adjusting screw
(1). The adjusting screw is on the bottom side of the housing.
The oil pump comes factory-set to a medium feed rate. You
can set the chain oil feed rate to minimum, moderate, and
maximum feed rate.
To adjust the supply rate, use a small screwdriver to turn the
adjusting screw:
to the right for a faster
to the left for a slower
oil feed rate.
Pick one of the three settings depending on the length of the
guide bar.
While working make sure there is enough chain oil in the tank.
If necessary, add oil.
22
1
45 3
2
STOP
ON
Starting the engine
Do not start the chain saw until after it is completely as-
sembled and checked!
Move at least 3 meters / 10 feet away from the place where the
chain saw was fuelled.
Make sure you have a secure footing, and place the saw on
the ground in such a way that the guide bar and chain are not
near anything.
Actuate the chain brake (block it).
Hold the front handle Þ rmly with one hand and press the saw
against the ground.
Hold the down rear handguard with your right foot as shown.
Note: The Featherlight-Start System lets you start the saw
without effort. Go through the starting procedure smoothly and
evenly.
Cold starting:
Prime the fuel pump (5) by pressing it several times until you
can see fuel in the pump.
Move the combination switch (1) up (choke position). This also
actuates the half-throttle lock.
Pull the starter handle (2) smoothly and evenly.
CAUTION: Do not pull the starter cable more than about 50
cm/20” out, and let it back in slowly by hand.
Repeat the starting procedure twice.
Move the combination switch (1) to the central “ON” position.
Pull the starter handle smoothly and evenly again. As soon as
the engine is running, grasp the rear handle (the safety lock
button (3) is actuated by the palm of the hand) and press the
throttle trigger (4).
CAUTION: The engine must be put in idle immediately after
starting. If this is not done, the clutch can be damaged.
Now disengage the chain brake.
Warm starting:
As described above for cold starting, but before starting push
the combination switch (1) up (Choke position) and
then right away back to the middle “ON” position. This is only
to engage the half-throttle lock. If the engine doesn’t start after
2 or 3 pulls, repeat the entire starting procedure as described
for cold starting.
NOTE: If the engine was switched off only for a short time, the
saw can be started without using the combination switch.
Important: If the fuel tank has been completely emptied and the
engine has stopped due to lack of fuel prime the fuel pump (5) by
pressing it several times until you can see fuel in the pump.
Stopping the engine
Depress the combination switch (1).
NOTE: After being pressed down, the combination switch will
revert to the ON position again. The engine is switched off, but can
be turned on again without moving the combination switch.
IMPORTANT: To cut off the ignition current, push the combina-
tion switch all the way down past the resistance point to the
safety position (
).
Cold start (Choke)
Warm start (ON)
Engine off
Combination switch
in safety position
(ignition current cut off,
necessary for all mainte-
nance, repair, and instal-
lation work)
23
7
8
Working in winter
In order to prevent carburetor icing in conditions of low tempe-
rature combined with high humidity, and below + 5°C in order
to get up to operating temperature faster, heated air can be
taken from the cylinder.
Remove the cover (see “Cleaning the air Þ lter”).
Remove the insert (7) and insert it as shown for winter opera-
tion.
If the temperature is above + 5°C (40°F) the engine needs to
induct cold air. If this is not done, the cylinder and piston
can be damaged!
For temperatures above + 5°C (40°F) turn the insert 180° so
that after it is inserted the induction opening (8) is closed.
Put the cover back on.
6
Symbol visible - Normal operation
Symbol
visible - Winter operation
Checking the chain brake
The chain brake must be checked before every use of the
saw!
Start the engine as described above (have a secure footing,
place the chain saw on the ground so that the chain and guide
bar are not near anything).
Hold the front handle Þ rmly, with your other hand on the rear
grip.
Let the engine run at medium speed and push the handguard
(6) in the direction of the arrow using the back of your hand,
until the chain brake engages. The chain should now stop im-
mediately.
Bring the engine back to idle and release the chain brake.
Caution: If the chain does not stop immediately in this test,
turn off the engine immediately. Do NOT use the chain saw
in this condition! Contact a DOLMAR service centre.
24
SHL
SERVICE
Adjusting the carburetor
CAUTION: Carburetor adjustment may only be done by a
specialist DOLMAR service centre!
Do not undertake any adjustments to adjusting screws (H)
and (L) without a tachometer! Incorrect adjustment can lead
to engine damage!
A tachometer is needed for adjustments to adjusting screws
(H) and (L), because if the engine runs over its maximum
rated speed, it can overheat and run out of lubricant. This
can damage the engine!
Only adjusting screw (S) can be manipulated by the user.
If the saw chain moves in idle (i.e. without the throttle being
pressed), it is imperative to correct the idle speed!
Do not adjust the idle speed until after complete assembly
and testing of the saw!
Idle speed adjustment must only be undertaken when
the engine is warm, with a clean air Þ lter and properly in-
stalled guide bar and chain.
Use a screwdriver (4 mm blade) for idle adjustments.
Adjusting the idle speed
Turn adjusting screw (S) counter-clockwise (unscrew): Idle
speed decreases.
Turn adjusting screw (S) clockwise (screw in): Idle speed
increases.
Important: If the saw chain still moves during idle even
after you have adjusted the idle speed, do NOT use the
saw. Take it to a DOLMAR service centre!
Note:
Carburetor adjustment aids in proper functioning, economi-
cal consumption, and safe operation.
Because of new exhaust regulations, the carburetor adjust-
ing screw (H) now comes with a limit feature. The reduced
adjustment range (about 180 degrees) prevents excessively
rich carburetor settings. On some models, the adjusting screw
(H) is locked. This ensures compliance with exhaust regula-
tions, as well as good engine functioning and economical fuel
consumption.
25
α
α
ββ
min.
3 mm (0.11”)
The sharpening angle (α) must be identical for all cutters!
30° for chain type 092, 484
The teeth will have the proper angle (ß) automatically if the
proper round Þ le is used.
80° for chain type 092, 484
Different angles result in a roughly, irregularly running chain,
increase wear and tear and cause chain beakage.
MAINTENANCE
Sharpening the saw chain
CAUTION: Before doing any work on the guide bar or chain,
always switch off the engine and pull the plug cap off the
spark plug (see „Replacing the spark plug“). Always wear
protective gloves!
The chain needs sharpening when:
The sawdust produced when sawing damp wood looks like
wood ß our.
The chain penetrates the wood only under great pressure.
The cutting edge is visibly damaged.
The saw is pulled to the left or right when sawing. This is caused
by uneven sharpening of the chain.
Important: Sharpen frequently, but without removing too
much metal!
Generally, 2 or 3 strokes of the Þ le will be enough.
Have the chain resharpened at a service centre when you have
already sharpened it yourself several times.
Proper sharpening:
CAUTION: Use only chains and guide bars designed for
this saw (see the Extract from the spare-parts list)!
All cutters must be of the same length (dimension a). Cutters
with different lengths result in rough running of the chain and
can cause cracks in the chain.
The minimum cutter length: 3 mm. Do not resharpen the chain
when the minimum cutter length has been reached; at this point,
the chain must be replaced (see the Extract from the spare-parts
list and „Replacing the saw chain“).
The depth of the cut is determined by the difference in height
between the depth limiter (round nose) and the cutting edge.
The best results are obtained with a depth-limiter depth of 0.64
mm (.025“).
CAUTION: Excessive depth
increases the risk of kickback!
0,64 mm
(.025”)
0,64 mm
(.025”)
26
1 2
4/5
Chain typ
484
Chain typ
092
Files and how to work with them
Use a special saw chain round Þ le for sharpening. Standard round
Þ les are unsuitable. For the order number, see “Accessories”.
Type 484: File the Þ rst cutter half with a 4,8 mm dia. round
saw-chain Þ le, then switch to a 4.5 mm dia. Þ le.
Type 092: Saw chain round Þ le, dia. 4.0 mm.
The Þ le should cut only when pushed forwards (arrow). Lift the
Þ le when leading it backwards.
First sharpen the shortest cutter. The length of this cutter is then
the standerd for all other cutters of the chain.
New saw teeth must be Þ led to the exact same shape as the
used teeth, including on their running surfaces.
File depending on chain type (90° or 10° to the guide bar).
A Þ le holder makes Þ le guidance easier. It is marked for the
correct sharpening angle of:
α = 25°
α = 30°
α = 35°
(keep the marks parallel with the chain when Þ ling, see illustration)
and limits the cut depth to the correct 4/5 of the Þ le diameter.
See "Accessories" for the order number.
After having sharpened the chain, the height of the depth limiter
must be checked by means of a chain gauge. See „Accessories“
for the order number.
Correct even the smallest excess height with a special ß at
Þ le (1). See „Accessories“ for the order number.
Round off the front of the depth limiter (2).
α
27
Cleaning the inside of the sprocket guard
CAUTION: Before doing any work on the guide bar or chain,
always switch off the engine and pull the plug cap off the
spark plug (see „Replacing the spark plug“). Always wear
protective gloves!
CAUTION: Start the chain saw only after having assembled
it completely and inspected.
Remove the sprocket guard (1) (see PUTTING INTO OPERA-
TION for the correct model) and clean out the interior with a
brush.
Remove the chain (2) and guide bar (3).
NOTE:
Make sure there are no residues or foreign matter remaining in
the oil guide groove (4) or on the chain tensioner (5).
To install the guide bar, saw chain, and sprocket guard, see
PUTTING INTO OPERATION for the correct model.
NOTE:
The chain brake is a very important safety device and like
any other component subject to normal wear and tear.
Regular inspection and maintenance are important for
your own safety and must be done by a DOLMAR service
centre.
SERVICE
Cleaning the guide bar
CAUTION: Protective gloves must be worn.
Regularly inspect the bearing surfaces of the guide bar (7) for
damage, and clean them with a suitable tool.
Keep the two oiling holes (6) and the entire guide bar clean and
free of foreign matter!
4
5
1
3 2
6 7
28
8
12
1 1
9
Check the sprocket before mounting a new chain.
Worn out sprockets (8) may damage the new chain and must
therefore be replaced.
Remove the sprocket guard (See „PUTTING INTO OPERA-
TION“).
Remove the chain and guide bar.
Remove circlip (9).
CAUTION: The circlip will pop out of the groove. When removing
it, hold your thumb against it to prevent it from popping off.
Remove thrust washer (11).
If the sprocket (8) is worn out, the complete clutch drum (12)
will need to be replaced (for the part number, see “Extract from
the spare parts list”).
Install a complete new clutch drum (12), cup washer (11) and
new circlip (9) (for the part numbers, see “Extract from the
spare parts list”).
For replacing the guide bar, chain, and sprocket see „PUTTING
INTO OPERATION“.
NOTE:
Don’t use a new chain on a worn chain sprocket. By the time
2 chains have worn, the sprocket has become worn out, so
it should be replaced at least at every second chain replace-
ment. To distribute the chain oil evenly, run a new chain at
half-throttle for a few minutes before use.
New chains stretch, so check the chain tension frequently (see
“Checking the chain tension”).
Replacing the saw chain
CAUTION: Use only chains and guide bars designed for this saw (see the Extract from the spare-parts list)!
When changing the type of chain, the complete clutch drum (12) must be changed to Þ t the different chain. If neces-
sary, replace it.
29
1
2
7
3
4
5
3
4
6
CAUTION: To prevent eye injury, always wear eye protection
when cleaning the Þ lter with compressed air!
Do not use fuel to clean the air Þ lter.
Unscrew the hood lock (1) counter-clockwise and remove the
hood (2).
Push up the combination switch (3) (Choke position) to prevent
dirt particles from falling into the carburetor.
Pull the air Þ lter (4) up and out.
IMPORTANT: Cover the intake opening with a clean cloth to
prevent dirt particles from getting into the carburetor.
Choosing the right Þ lter: The ß eece Þ lter (available as acces-
sory) is for use in dry or dusty conditions. The nylon Þ lter is for
use in damp conditions.
Pry apart the top and bottom of the air Þ lter as shown in Fig-
ure.
Cleaning the ß eece Þ lter: Carefully tap out dust or carefully
blow out dust from the inside with compressed air. Do not
brush the ß eece, as this will force dirt particles into the fabric.
If the Þ lter is very dirty, it can be washed in lukewarm water
with regular dishwashing detergent. Note that the ß eece Þ lter
does not need to be cleaned until there is a noticeable loss of
power. If cleaning the Þ lter does not bring an improvement in
performance, it is time to replace it.
Cleaning the nylon Þ lter: Use a soft brush or blow out dirt
from the inside with compressed air. If the Þ lter is very dirty, it
can be washed in lukewarm water with regular dishwashing
detergent. Clean frequently (several times a day) when working
in very dusty or dirty conditions. Full engine power is possible
only with a clean air Þ lter!
Let the air Þ lter dry completely.
Put the top and bottom sections back together.
Before assembling the air Þ lter, check the choke ß ap for any dirt
particles. If there are any, remove them with a brush.
Clean the area around the O-ring (5) at the induction opening.
If the O-ring is damaged, replace it!
CAUTION: If the air Þ lter becomes damaged, replace imme-
diately! Pieces of cloth or large dirt particles can destroy
the engine!
Insert an air Þ lter (4).
Push down the combination switch (3
) and press the throttle
(6) all the way down one time in order to deactivate the throt-
tle lock.
Put the hood (2) back on, Þ rst guiding the two holders (7) into
their slots.
Screw the hood lock (1) back on tightly clockwise.
Cleaning the air Þ lter
30
11 12
13
8
0,5 mm
9
10
Replacing the spark plug
CAUTION:
Do not touch the spark plug or plug cap if the engine is
running (high voltage).
Switch off the engine before starting any maintenance work.
A hot engine can cause burns. Wear protective gloves!
The spark plug must be replaced in case of damage to the
insulator, electrode erosion (burn) or if the electrodes are very
dirty or oily.
Remove the Þ lter cover (see „Cleaning the air Þ lter“).
Pull the plug cap (8) off the spark plug. Use only the combination
wrench supplied with the saw to remove the spark plug.
Electrode gap
The electrode gap must be 0.5 mm.
CAUTION: Use only the following spark plugs:
NGK CMR7A-5.
Checking the ignition spark
Insert combination tool between hood and cylinder as shown.
CAUTION! Do not insert the combination tool into the
spark plug hole! Make contact only with the cylinder (oth-
erwise you might damage the engine).
Using insulated pliers, press the unscrewed spark plug (9)
against the combination tool (away from the spark plug hole)
with the spark plug cap Þ rmly on the plug.
Put combination switch (10) in the ON position.
Pull the starter cable hard.
If the function is correct, an ignition spark must be visible near
the electrodes.
Checking the mufß er screws
Unscrew 3 screws (11) and remove the upper half of the muf-
ß er (12).
Note: For saw models with catalytic converters (PS-350 SC,
420 SC), remove the converter along with the upper mufß er
half.
The screws on the bottom mufß er half (13) are now accessible,
and it is possible to check them for tightness. If they are loose,
tighten by hand (Caution: do not over-tighten).
31
1
2
9
4
10
12
11
7
8
6
5
13
3
14
Replacing the starter cable/ Replacing the return
spring pack/Replacing the starter spring
Unscrew four screws (1).
Remove fan housing (2).
Remove the air guide (3) from the fan housing.
CAREFUL! Injury hazard! Do not unscrew screw (7) if the
return spring is under tension.
If the starter cable is to be replaced although it is not broken,
it will be necessary to Þ rst de-tension the cable drum return
spring (13).
To do this, use the grip to pull the cable all the way out of the
fan housing.
Hold the cable drum with one hand, and with the other push the
cable into the space (14).
Carefully let the drum turn until the return spring is no longer
under tension.
Unscrew screw (7) and remove the driver (8) and spring (6).
Carefully remove the cable drum.
Remove any cable pieces.
Thread a new cable (dia. 3.5 mm, length 900 mm) as shown
in the illustration (don’t forget the washer (10)) and knot both
ends as shown.
Pull knot (11) into the cable drum (5).
Pull knot (12) into the starter grip (9).
Put the drum on its spindle and turn it slightly until the return
spring engages.
Place the spring (6) in the driver (8) and place them together
in the cable drum (5) while turning slightly counter-clockwise.
Insert screw (7) and tighten.
Guide the cable into the slot (14) on the cable drum and turn
the drum with the cable clockwise three times.
Hold the cable drum with your left hand and with your right hand
untwist the cable, pull it tight and hold it.
Carefully release the cable drum. The spring will wind the cable
around the drum.
Repeat the procedure once. The starter grip should now stand
straight up on the fan housing.
NOTE: With the cable pulled all the way out, it must still be
possible to turn the pulley another 1/4 turn against the return
spring.
CAUTION: Danger of injury! Secure the cable grip when
pulled out! It will whip back if the cable pulley is released
by accident.
Replacing the return spring pack
Disassemble the fan housing and cable drum (see above).
CAREFUL! Injury hazard! The return spring can pop out!
Always wear eye protection and protective gloves!
Lightly tap the fan housing on a wooden surface with the entire
surface of the hollow side, and hold it down. Now lift the fan
housing carefully and in small steps. This will allow the return
spring pack (13), which should now have fallen out, to relax in
a controlled manner if the return spring has popped out of the
plastic pack.
Carefully insert a new return spring cassette and press down
until it engages.
Place the cable drum on it and turn it slightly until the return
spring engages.
Install the spring (6) and driver (8) and screw on tight with
screw (7).
Tension the spring (see above).
Replacing the starter spring
NOTE: If the spring (6) in the Featherlight-Starting system is
broken, more effort will be required to start the engine and you
will notice some resistance when pulling the starter cable. If
you notice this, check the spring (6) and replace if necessary.
Mounting the fan housing
Insert the air guide (3) in the fan housing so that the two
recesses (4) engage.
Position the fan housing against the housing, press against it
lightly and pull the starter grip until the starter engages.
Tighten screws (1).
32
16
Replacing the suction head
The felt Þ lter (16) of the suction head can become clogged.
It is recommended to replace the suction head once every
three months in order to ensure unimpeded fuel ß ow to the
carburetor.
To remove the suction head for replacement, pull it out through
the tank Þ ller neck using a piece of wire bent at one end to
form a hook.
15
15
Cleaning the air Þ lter compartment / fan com-
partment
Remove cover.
Remove the fan housing.
CAUTION: To prevent eye injury, always wear eye protection
when cleaning the Þ lter with compressed air!
The entire area (15) can now be brushed clean or cleaned with
compressed air.
Cleaning the cylinder Þ ns
A bottle brush can be used to clean the cylinder Þ ns.
33
General Chain saw Clean exterior, check for damage. In case of damage,
have repaired by a qualiÞ ed service centre immediately
Saw chain Sharpen regulary, replace in good time 25-26
Chain brake Have inspected regularly at an authorized service centre
Guide bar Turn over to ensure even wear of bearing surfaces
Replace in good time 13, 27
Starter cable Check for damage. Replace if damaged. 31
Before each start Saw chain Inspect for damage and sharpness 25-26
Check chain tension 13, 17
Guide bar Check for damage
Chain lubrication Functional check 21
Chain brake Functional check 23
Combination switch,
Safety locking button,
Throttle lever Functional check 22
Fuel/oil tank
cap Check for tightness
Every day Air Þ lter Clean (several times daily if necessary) 29
Guide bar Check for damage, clean oil intake bore 27
Guide bar support Clean, in particular the oil guide groove 21, 27
Idle speed Check (chain must not run) 24
Every week Fan housing Clean to maintain good cooling air ß ow. 10
Air Þ lter compartment Clean to maintain good cooling air ß ow. 32
Fan compartment Clean to maintain good cooling air ß ow. 32
Cylinder Þ ns Clean to maintain good cooling air ß ow. 32
Spark plug Check and replace if necessary 30
Mufß er Check tightness of mounting, Check screws 10, 30
Chain guide Check 10
Screws and nuts Check their condition and that they are Þ rmly secured.
Every 3 months Suction head Replace 32
Fuel, oil tanks Clean
Annually Chain saw Check at an authorized service centre
Storage Chain saw Clean exterior, check for damage. In case of damage,
have repaired by a qualiÞ ed service centre immediately
Guide bar/chain Demount, clean and oil slightly
Clean the guide groove of the guide bar 27
Fuel, oil tanks Empty and clean
Carburetor Run empty
Page
Instructions for periodic maintenance
To ensure long life, prevent damage and ensure the full functioning of the safety features the following maintenance must be per-
formed regularly. Guarantee claims can be recognized only if this work is performed regularly and properly. Failure to perform the
prescribed maintenance work can lead to accidents!
The user of the chain saw must not perform maintenance work which is not described in the instruction manual. All such work must
be carried out by a DOLMAR service centre.
34
Service, spare parts and guarantee
Maintenance and repair
The maintenance and repair of modern engines as well as all safety devices require qualiÞ ed technical training and a special work-
shop equipped with special tools and testing devices.
Any work not described in this Manual may be performed only by a DOLMAR service centre.
The DOLMAR service centres have all the necessary equipment and skilled and experienced personnel, who can work out cost-
effective solutions and advise you in all matters. To Þ nd your local distributor, please visit www.dolmar.com
Repair attempts by third parties or unauthorized persons will void all warranty claims.
Spare parts
Reliable long-term operation, as well as the safety of your chain saw, depend among other things on the quality of the spare parts
used. Use only original DOLMAR parts, marked
Only original spare parts and accessories guarantee the highest quality in material, dimensions, function and safety.
Original spare parts and accessories can be obtained from your local dealer. He will also have the spare part lists to determine the
required spare part numbers, and will be constantly informed about the latest improvements and spare part innovations.
Please bear in mind that if parts other than original DOLMAR spare parts are used, this will automatically invalidate the DOLMAR
product guarantee.
Guarantee
DOLMAR guarantees the highest quality and will therefore reimburse all costs for repair by replacement of damaged parts resulting
from material or production faults occurring within the guarantee period after purchase. Please note that in some countries particular
guarantee conditions may exist. If you have any questions, please contact your salesman, who is responsible for the guarantee of
the product.
Please note that we cannot accept any responsibility for damage caused by:
Disregard of the instruction manual.
Non-performance of the required maintenance and cleaning.
Incorrect carburetor adjustment.
Normal wear and tear.
Obvious overloading due to permanent exceeding of the upper performance limits.
Use of guide bars and chains which have not been approved.
Use of guide bar and chain lengths which have not been approved.
Use of force, improper use, misuse or accidents.
Damage from overheating due to dirt on the fan housing.
Work on the chain saw by unskilled persons or inappropriate repairs.
Use of unsuitable spare parts or parts which are not original DOLMAR parts, insofar as they have caused the damage.
Use of unsuitable or old oil.
Damage related to conditions arising from lease or rent contracts.
Damages caused by disregarding loose outer bolted connections.
Cleaning, servicing and adjustment work is not covered by the guarantee. All repairs covered by the guarantee must be performed
by a DOLMAR service centre.
35
Trouble shooting
Malfunction System Observation Cause
Chain does not run Chain brake Engine runs Chain brake actuated.
Engine does not start or Ignition system Ignition spark Malfunction in fuel supply system, com-
only with difÞ culty pression system, mechanical malfunction.
No ignition spark STOP switch in position, fault or short-circuit in
the wiring, Spark plug cap or spark plug defective
Fuel supply Fuel tank is Þ lled Combination switch in Choke position,
carburetor defective, suction head dirty, fuel
line bent or interrupted.
Compression Inside Cylinder base packing ring defective, radial
system shaft packings defective, cylinder or piston
rings defective
Outside Spark plug does not seal.
Mechanical Starter does not engage Spring in starter broken, broken parts
malfunction inside the engine.
Warm start difÞ culties Carburetor Fuel tank is Þ lled Wrong carburetor adjustment.
Ignition spark
Engine starts, but Fuel supply Fuel tank is Þ lled Wrong idling adjustment, suction head or
dies immediately carburetor dirty.
Tank venting defective, fuel line interrupted,
cable defective, Combination switch defective,
Decompression valve dirty
InsufÞ cient power Several systems Engine is idling Air Þ lter dirty, wrong carburetor adjustment,
may be involved mufß er clogged, exhaust channel in cylinder
simultaneously clogged, spark arrester screen clogged.
No chain lubrication Oil tank/pump No oil on the chain Oil tank empty.
Oil guide groove dirty.
Oil-pump adjusting screw incorrectly adjusted.
36
26
33
27 28 29 30 31/32
25
10
8
9
7
2220
6
5
4
19
1
2
3
14
17
15
16
18
13
11
12
21
23
PS-350 S, 350 SC
PS-420 S, 420 SC
Extract from the spare parts list
Use only original DOLMAR parts. For repairs and
replacement of other parts, see your DOLMAR service centre.
37
Extract from the spare parts list
Use only original DOLMAR parts. For repairs and
replacement of other parts, see your DOLMAR service centre.
PS-350 S, 350 SC
PS-420 S, 420 SC
Pos. DOLMAR-No. Qty. Denomination
1 412 030 661 1 Sprocket nose bar 3/8”, 30 cm (12”)
412 035 661 1 Sprocket nose bar 3/8”, 35 cm (14”)
412 040 661 1 Sprocket nose bar 3/8”, 40 cm (16”)
1 412 030 061 1 Sprocket nose bar 3/8”, 30 cm (12”)
412 035 061 1 Sprocket nose bar 3/8”, 35 cm (14”)
412 040 061 1 Sprocket nose bar 3/8”, 40 cm (16”)
2 528 092 746 1 Saw chain 3/8“ for 30 cm
528 092 752 1 Saw chain 3/8“ for 35 cm
528 092 756 1 Saw chain 3/8“ for 40 cm
1 414 033 141 1 Sprocket nose bar .325”, 33 cm (13”)
414 038 141 1 Sprocket nose bar .325”, 38 cm (15”)
414 045 141 1 Sprocket nose bar .325”, 45 cm (18”)
2 512 484 756 1 Saw chain .325“ for 33 cm
512 484 764 1 Saw chain .325“ for 38 cm
512 484 772 1 Saw chain .325“ for 45 cm
3 952 010 130 1 Chain protector for 30-35 cm (3/8”)
952 010 140 1 Chain protector for 40 cm (3/8”)
952 020 130 1 Chain protector for 33 cm (.325”)
952 020 140 1 Chain protector for 38-45 cm (.325”)
4 941 713 160 1 Universal wrench SW 13/16
5 940 827 000 1 Offset screwdriver
6 944 340 001 1 Carburetor screwdriver
7 320 163 447 1 Suction head
8 181 114 202 1 Fuel tank cap, cpl.
9 963 229 036 1 O-Ring 29,3 x 3,6 mm
10 195 160 050 1 Return spring pack, complete
11 195 160 030 1 Spring
12 195 160 020 1 Driver
13 195 160 060 1 Starter cable 3,5x900 mm
14 965 603 040 1 Spark plug
15 181 114 202 1 Oil tank cap, cpl.
16 963 229 036 1 O-Ring 29,3 x 3,6 mm
17 195 173 150 1 Air Þ lter (ß eece)
17 195 173 050 1 Air Þ lter (nylon)
18 195 213 100 1 Sprocket guard, cpl.
195 213 150 1 Sprocket guard (with fast tensioner), complete
19 923 208 004 2 Hexagonal nut M8
20 181 223 310 1 Clutch drum cpl. .325“, 7-tooth
195 223 310 1 Clutch drum cpl. 3/8“, 6-tooth
21 181 224 081 1 Cup washer
22 927 408 000 1 Circlip
23 963 220 013 1 O-Ring 20 x 1,3 mm
Accessories (not delivered with the chain saw)
25 953 100 090 1 Chain gauge
26 953 004 010 1 File handle
27 953 003 100 1 Round Þ le, dia. 4,5 mm
28 953 003 070 1 Round Þ le, dia. 4,8 mm
29 953 003 090 1 Round Þ le, dia. 4,0 mm
30 953 003 060 1 Flat Þ le
31 953 030 030 1 File holder 3/8“
32 953 030 030 1 File holder .325“
33 950 233 210 1 Tachometer
- 949 000 035 1 Combined can
(for 5l fuel, 2.5l chain oil)
38
EU Conformity Declaration
The undersigned, Tamiro Kishima and Rainer Bergfeld, as authorized by DOLMAR GmbH, declare that the DOLMAR machines,
Type: 194, 195
Chain saw EU prototype test certiÞ cate No.
PS-350 S, PS-350 SC (194) M6T 09 10 24243 106
PS-420 S, PS-420 SC (195) M6T 09 10 24243 106
manufactured by DOLMAR GmbH, Jenfelder Str. 38, 22045 Hamburg, Germany, conforms to the basic safety and health require-
ments of the applicable EU Directives:
EU Machinery Directive 2006/42/EG.
EU EMC Directive 2004/108/EG.
Outdoor Noise Directive 2000/14/EG.
The most important standards applied to properly meet the requirements of the above EU Directive were: EN 11681-1, EN ISO
14982, CISPR 12.
The conformity assessment procedure 2000/14/EG was performed per Annex V. The measured noise level (L
wa
) is 111,7 dB(A). The
guaranteed noise level (L
d
) is 113 dB(A).
The EU Type-Examination Certificate was performed by: TÜV Product Service GmbH, Zertifizierstelle, Ridlerstr. 31,
D-80339 Munich.
The technical documentation is on Þ le at DOLMAR GmbH, Jenfelder Strasse 38, Department FZ, 22045 Hamburg, Germany.
Hamburg, 4.11.2009
For DOLMAR GmbH
Tamiro Kishima Rainer Bergfeld
Managing Director Managing Director
39
Form: 995 701 352 (4.11 GB)
SpeciÞ cations subject to
change without notice
DOLMAR GmbH
Postfach 70 04 20
D-22004 Hamburg
Germany
http://www.dolmar.com
To Þ nd your local distributor,
please visit www.dolmar.com
2

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