3.1Correct use .................................................................................................................................... 6
3.4When fuelling up ........................................................................................................................... 8
3.5In transport .................................................................................................................................... 8
3.6During assembly, cleaning, maintenance and repair .................................................................... 9
4.3Device views and important operating and function parts ........................................................... 12
4.4Throttle control, decompression valve, choke lever and part throttle setting .............................. 14
4.5Technical data ............................................................................................................................. 15
5Preparing for use ............................................................................................................................... 16
5.1Installing
the cut-off wheel ........................................................................................................... 16
5.2Installing cut-off wheels with 1" inner bore .................................................................................. 17
5.3Removing the cut-off wheel ......................................................................................................... 17
5.4Adjusting the wheel guard ........................................................................................................... 18
5.5Fuelling up ................................................................................................................................... 18
5.6Adjusting the ribbed belt tension ................................................................................................. 20
5.7Water connection for wet cutting ................................................................................................. 20
5.8Relocate cutting device from centre position to outer position .................................................... 21
6Starting up and switching off the engine ........................................................................................ 24
6.1Starting process .......................................................................................................................... 24
6.2Switching off the engine .............................................................................................................. 24
7Power tool use ................................................................................................................................... 25
10Wear parts .......................................................................................................................................... 39
11EC declaration of conformity ............................................................................................................ 39
Table of Contents
Information about these operating instructions
ENGLISH 4
These operating instructions are an integral part of the motor device.
They contain important information and instructions for handling the motor device. Always follow
any specified safety regulations and instructions, as they are a prerequisite for ensuring that you
are working safely with the equipment.
These operating instructions must be kept available at the place of use of the equipment at all
times, and they must be read carefully by everyone who works on or with the equipment (including
for maintenance, care and repairs).
These operating instructions must only be used as operating instructions for the motor device 879-12 /
879-14.
Any utilisation of the contents (text and graphics illustrations) – even in excerpts – without our prior written
consent shall be forbidden and may be prosecuted.
Text highlights
Xxxxx Underlined text marks interim headlines.
XxxxxText in italics marks advice and notes that facilitate use of the motor device for the user.
1 Xxxxx Numbered text with a black background marks main chapter headlines.
1.1 Xxxx Numbered text with a grey background marks main subchapter headlines.
Xxxxxxx Frames mark especially highlighted sections.
Structure
The operating instructions are structured by numbered main and subchapters. The table of contents on
page 3 shows an overview of the structure.
Header
To make it easier for the user to find the chapters, the header names the main chapter to which the
content on the respective page belongs.
Pictures and diagrams
Some graphical illustrations in these operating instructions are schematic illustrations or principle
illustrations and may not show exactly your device model. The conveyed contents, however, are binding in
any case.
1 Information about these operating instructions
1.1 Notational conventions used in the operating instructions
Warning, instruction and notice icons
ENGLISH 5
Important: If one or several icons in these operating instructions are centred and directly below a chapter
header the notice applies for the entire chapter.
Warning, instruction and notice icons used in the operating instructions and on the equipment:
Warning! Failure to comply with the instructions could cause accidents with potentially life-
threatening injuries.
Caution! Failure to comply with the instructions could result in damage to the equipment or other
material damage.
Carefully read the operating instructions. This applies before placing the equipment into
operation and before any cleaning, maintenance or assembly work.
Always wear the prescribed clothing. Î Chap. 3.3, page 7
Always wear sturdy shoes with good grip.
Wear safety gloves. This applies to all work with or on the equipment.
Choke flap: Cold start position Î pull the lever out
Operation and warm start Î press the lever in
Before starting the engine, put on hard hat, hearing protection, face shield and safety glasses.
Switch off the engine!
Smoking is prohibited anywhere near the power tool and in the location where it is refuelled!
Keep the power tool and fuel canisters away from open flames.
Warning: Danger of poisoning! - The power tool generates exhaust gases.
- Petrol vapours are toxic.
- Dangerous dust emissions when working.
Warning: Kickback!
Notes in chap. 7.2 as of page 26 must be observed under all circumstances!
Warning: Danger of fire from sparks.
Wear breathing protection equipment.
Never use toothed circular saw blades.
Never use a damaged cut-off wheel.
Only use cut-off wheels approved for a speed of 4,550 min
-1
[4,550 rpm].
Noise level L
WA
= 110 dB(A)
Fuel tank Î Chap. 5.5, as of page 18
2 Warning, instruction and notice icons
Safety provisions
ENGLISH 6
This power tool must only be used to cut/shorten metals (hot cut) and mineral materials, such as concrete
(cold cutting). Use only the cut-off wheels approved for the material being cut and only for the working
situation indicated in chap. 7 on page 25.
For specifically trained users in rescue missions, other approved cut-off wheels are also offered that can
be used to cut various composites. These special applications are only permitted to specifically trained
users.
This power tool must only be used for outdoor work.
Use of this power tool for any other purpose, such as sawing of wood and to remove/grind off a material
using the side surfaces of the cut-off wheel is forbidden.
Unapproved cutting tools, such as saw blades or knives, must never be installed on the motor device.
Before using the power tool, read these operating instructions thoroughly and keep them in a safe and
accessible location. They must be kept available at the place of use of the equipment at all times, and they
must be read by everyone who works on or with the equipment (including for maintenance, care and
repairs).
Use this power tool with care. Improper or careless use of this power tool could cause serious injury or
death. The tool can generate large forces and torques resulting from the high speed rotation of the cut-off
wheel.
Working with and on the power tool must be done carefully and with the greatest care. Thorough risk
estimation must be performed before taking up the work. Never perform any work processes that you are
not ready for or the risks of which you cannot entirely assess. If you are still unsure after studying these
operating instructions, ask a specialist for help.
The ignition unit of this power tool generates an electromagnetic field in operation. This field may affect the
function of pacemakers under certain conditions. Persons with a pacemaker must consult their physician
and the pacemaker manufacturer before using this power tool.
General information on vibration: The following symptoms may occur from frequent vibration of fingers,
hands or wrists: Fingers, hands or wrists falling asleep, tickling, pain, stabbing pain, changes of the skin
tone or skin. If such symptoms are found, see a physician.
Failure to observe the safety notes may be potentially fatal.Observe the accident prevention provisions of
the local committees, authorities and the professional associations.
x For any accidents that may occur, a first aid kit must be present at the workplace at all times.
Material that has been removed must be refilled at once.
x Danger of fire from sparks! When working close to easily flammable objects or vegetation, a fire
extinguisher must be provided.
x A first time operator should obtain practical instruction by a specialist before using the power tool.
x Children and teens (minors) under 18 years of age must not work with this power tool; this does not
include youths older than 16 who are trained under supervision.
x The power tool generally must be operated by only one person – also when starting up.
Keep unnecessary personnel away from the work area. Do not work around animals.
If a person or animal approaches, the power tool must be stopped at once.
The user is responsible for any injury and property damage he causes.
x This power tool must only be used by persons who are familiar with this type of machine, its operation
and the operating instructions. Never lend this power tool to personnel not familiar with this power tool.
Always include these operating instructions.
3 Safety provisions
3.1 Correct use
3.2 General safety notes
Safety provisions
ENGLISH 7
x Only work with this power tool when you are in good shape, rested and healthy.
x Persons under the influence of alcohol or drugs, including prescription drugs, should never use this
power tool, as their ability to quickly react to potential danger may be impaired.
x Never operate this power tool when you are fatigued or exhausted. Tiredness and exhaustion may result
in loss of control. Be alert – if you get tired or exhausted while operating your power tool, take a break.
Working with the power tool can be strenuous. If you have any condition that might be aggravated by
strenuous work, check with your doctor before operating this power tool.
x If materials that may contain asbestos or other toxic substances are to be cut, inform the relevant
authority first. Work must only be performed upon approval and only under supervision and compliance
with the required safety measures.
x Be aware of hidden hazards, such as electrical cables, water or gas pipes and flammable substances in
the area to be cut!
x When cutting pre-tensioned and steel-reinforced concrete pillars, observe all instructions and standards
that the respective authorities or component manufacturers have stipulated. Cutting of reinforcement
bars must be performed in the prescribed order and under consideration of the relevant safety
provisions.
x Never alter, change or modify any safety equipment or functional assemblies of this power tool.
x Prevent accidents! Only use this power tool if it is in good, safe condition! Always check the power tool
prior to use.
x Only use those accessories and attachments that have been supplied and approved for attachment to
this power tool by us. Only cut-off wheels approved for this power tool must be used as cutting tools.
x Reliable operation and safety of this power tool also depend on the quality of the spare parts used. Use
only genuine spare parts. Original spare parts are identical with original production parts and guarantee
the best quality in material, dimensions, function and safety. Original parts and accessories are available
from your specialist dealer. Your dealer has been supplied with appropriate documentation to determine
the correct parts. Your dealer is frequently supplied with updates about improvements to the equipment.
Please note that the use of non-original parts will void your warranty.
x Always store the power tool in a safe place and in such a way that it will not pose any danger. Stop the
engine. Never let the power tool run unsupervised!
Persons who disregard safety instructions, operating or maintenance instructions are liable for any
damage or consequential losses.
In order to prevent injuries, please make sure that you wear the prescribed clothing and protective
equipment.
Clothes should be tight-fitting (no lapels), but not hindering. When performing any work, wear a
working suit of firm materials with sufficient flame inhibition that cannot ignite by flying sparks
(materials of leather, cotton after flame-inhibiting treatment or heavy close-meshed linen fabrics).
Check the information in the work clothes and ensure that non-flammable materials and no synthetic
materials like polyester or nylon are contained in the clothes. The working clothes must never be
contaminated with flammable substances such as petrol or similar products.
Do not wear scarves, ties, jewellery or other clothes that may get caught in the cut-off wheel, objects in the
environment, or the power tool. Tie back long hair and secure it under a hard hat.
Wear a protective hard hat during any work. Use personal hearing protection.
Eye and face protection is mandatory pursuant to ANSI Z 87.1.
Wear firm safety shoes with steel toes and a good grip.
Wear a protective apron.
Wear protective gloves with non-slip palms.
When wet cutting is not utilized, the operator and bystanders should always wear adequate
breathing protection equipment.
3.3 Personal protection equipment (PPE)
Safety provisions
ENGLISH 8
Petrol is highly flammable. Keep away from open flame and do not spill fuel. Do not smoke at the
workplace or at the site of fuelling!
x Always switch off the engine before fuelling.
x Fire hazard! Never refuel while the engine is still hot!
x Always carefully open the tank cap so that any overpressure present can reduce slowly and no fuel will
splash out.
x Prevent skin and eye contact with fuel and other mineral oil products by wearing protective clothing, eye
and face protection. In case of eye contact, rinse at once with lots of clear water. In case of persistent
irritation, see a doctor immediately!
x Regularly change and clean protective clothes.
x Avoid breathing in fuel vapour.
x The refuelling site should be well ventilated.
x Avoid any soil spillage of fuel or oil (protection of the environment). Use a suitable mat.
x Immediately clean any fuel spilled on the power tool. Change contaminated clothing without delay.
x Always tighten the fuel tank cap firmly by hand without using any tools. Tank cap is equipped with an
overturning protection and must be turned closed until a clear "skipping".
The fuel tank cap must not be able to work itself loose as a result of the vibrations of the engine.
x Danger to life from burns! Observe leaks. Do not start up and work when fuel is escaping.
x Fuels and oil must only be stored in properly and correctly labeled containers.
x Before carrying the power tool (even across short distances from one working area to the next), always
turn off the engine and wait until the cut-off wheel has stopped. Carry the power tool by the top handle
and have the cut-off wheel point backwards.
x Danger of burns! Do not touch the hot muffler.
x Never carry or transport the power tool with the cut-off wheel running.
x To avoid spilling of fuel and to prevent damage, the power tool must be secured against tipping when
transporting it in vehicles. Check the tank for fuel for tightness.
Recommendation: Empty the tank before transport.
x Empty the tank before shipping.
x Remove cut-off wheel before shipping.
Recommendation: Keep the original packaging in order to protect the equipment against transport damage
in case you ever need to ship it or transport it.
3.4 When fuelling up
3.5 In transport
Safety provisions
ENGLISH 9
x The power tool must not be assembled, maintained, repaired or stored in the vicinity of open flames.
x Before assembly, cleaning, maintenance and repair, always turn off the engine and the cut-off wheel
must have stopped.
Only the idle speed setting must be performed with the engine running.
x Wear protective gloves for any work.
x The power tool requires regular maintenance. Only perform such maintenance and repair work on your
own that are described in these operating instructions and that you consider yourself skilled at
performing. Any other work must only be performed by specialist workshops authorised by us.
x Danger of burns! Do not touch the muffler while it is still hot – not even for maintenance or to check it for
tight fit.
x Only perform repairs with original spare parts.
x Danger of accident and injury! Never modify the power tool, as this may impair safety!
Before start-up, check the entire power tool for operationally safe conditions. In addition to the notes in the
operating and maintenance notes (Î chap. 8, page 29), check the following items:
x One-touch stop button must be easy to operate.
x The throttle control must move freely and return automatically to the idle position. It must not be possible
to operate the throttle control without pushing (unlocking) the throttle control lock (throttle control
locked).
x The cut-off wheel must be attached firmly to the spindle.
x Danger of fire! Ignition cable and spark plug connector must be firmly in place. Loose connection can
result in sparks which could ignite any escaping fuel/air mixture!
x In case of irregularities, visible damage, improper settings or limited function, the power tool must not be
started. In such cases, have the power tool inspected by specialist workshops authorised by us.
x Only use the power tool if it is in completely assembled condition.
x Keep at least 3 metres [approx. 10 feet] distance from the fuelling site when starting.
Never start the power tool in closed rooms.
x Hold the tool securely and firmly when starting.
Always start up on level ground and securely hold the power tool.
x Perform the starting process as described in chap. 6 on page 24.
x Check the idle setting after starting. The cut-off wheel must not rotate in idle mode.
3.6 During assembly, cleaning, maintenance and repair
3.7 Before start-up
3.8 When starting
Safety provisions
ENGLISH 10
In addition to the safety provisions already listed, the following safety provisions also apply when working
with the motor device:
x Danger of poisoning! Once the engine is running, the power tool produces toxic exhaust that may be
invisible and odourless. Never start the power tool in closed rooms. Special danger also applies in
narrow situations, troughs or ditches. Only work here when it is absolutely certain that there is sufficient
air exchange and that no toxic gases may accumulate.
x Increased danger of fire! Do not smoke at the workplace – not even in the proximity of the power tool.
x Secure the workplace against accidental access by third parties, e.g. with warning signs. Only persons
involved and wearing adequate protective equipment and clothes must be present within 30 metres
[approx. 30 yards] around the working area.
x Check the site of deployment for possible dangers.
– Spark formation during cutting means that work must never be performed close to potentially
explosive gases of liquids, or easily flammable objects.
– No electrical lines, water or gas pipes or flammable substances must be placed in the area to be cut.
– Objects that may fall off or topple over during work must be secured or removed from the working
environment first.
– Prepare the workplace so that secure operator mobility is possible.
x The work piece to be cut must be free of foreign bodies such as screws, nails or stones.
x When working in residential areas, observe the noise protection provisions.
x Work carefully, considerately and calmly and do not endanger others.
– Ensure good sight and light conditions.
– Always remain within calling distance of other persons who may administer first aid in emergencies.
– Schedule work breaks.
– Be attentive towards possible danger sources and take the corresponding preventive measures.
Consider that use of hearing protection limits perception of sounds. Signal sounds, calls, etc. that
announce danger may also be missed.
– Observe tripping dangers and obstacles. Never work on unstable grounds.
– Always hold the power tool with both hands and always ensure a safe and firm stance.
– Never cut standing on a ladder.
– Guide the power tool so that no body part is located in the extended swivel range of the cut-off
wheel.
– Do not hold the work piece in your hand and bring it into contact with the wheel.
– Process only the work piece to be cut with the rotating cut-off wheel.
Never touch the floor or other objects with the cut-off wheel running.
– Do not use the power tool to level off and shovel away objects.
x Switch off the engine when the power tool starts to behave noticeably differently.
x Danger of burns! Do not touch the muffler while it is still hot.
Danger of fire! Muffler radiates enormous heat.
Never put the hot power tool into dry grass or on flammable objects.
x Danger of hearing damage and burns!
Never work with defective muffler or without muffler.
3.9 During work
Power tool description
ENGLISH 11
If metals or mineral materials, such as stone, masonry, concrete or ceramics are processed with the power
tool, fine dust, dust, steam and smoke that contain substances hazardous to health may arise. These
substances may cause severe or fatal diseases, such as respiratory diseases, cancer, damage to the
reproductive system and genetic code (malformation of progeny).
For example, crystalline silicone dioxide can be released when processing quartz-containing materials
such as stone, masonry, granite or concrete. Respirable crystalline silicone dioxide may trigger severe or
fatal respiratory diseases, such as silicose, and is suspected of being carcinogenic.
A list of substances hazardous to health might possibly be available from the country-specific authorities,
institutes or professional associations.
x If you cannot assess the risk connected with use and setup of the power tool and the material
processed, read up the following documents on the health and safety risks:
– Material-specific safety data-sheets
– Operating instructions of the power tool
– Work instructions and safety provisions of your employer
– Information and recommendations of your dealer, specialist dealer or specialist workshop
– Information of the country-specific authorities, institutes and professional associations
x Always observe all the work instructions, safety notes and safety provisions for the secure and effective
handling of the cutting materials and the power tool that have been published by your employer,
country-specific authorities, institutes and professional associations.
x If possible avoid the generation of fine dust, dust, steam and smoke by the corresponding work conduct
and work techniques.
x If possible, use cut-off wheels suitable for wet cutting and the water connection of the power tool.
When cutting with water supply, the dust is reduced, visibility is improved and the cut-off wheel service
life is increased by the cooling effect of the water.
x If danger from inhalation of fine dust, dust, steam and smoke cannot be excluded by technical
measures, such as use of the power tool's water connection or a suitable extraction device, all persons
in the proximity and users of the power tool must wear suitable breathing protection equipment to
protect them from dust.
x Basic device
x Cut-off wheel
x Spindle adapter disk for cut-off wheels with 1" inner bore
x Tools: Combination tool (spark plug spanner with screwdriver), blocking pin and additional small
screwdriver
x These operating instructions (incl. EC Declaration of conformity: Î Chap. 11, page 39)
a: Type designation
b: Serial number
c: Bar code
d: Year of build
3.10 Dust emission
4 Power tool description
4.1 Scope of delivery
4.2 Type plate
Power tool description
ENGLISH 12
1. Cut-off wheel 16. Starter handle
2. Wheel guard 17. One-touch stop button
3. Handle for wheel guard adjustment 18. Fuel tank cap
3.2Indications de sécurité générales .................................................................................................... 6
3.3Tenue de travail préconisée / EPP (Équipement de protection personnel) ..................................... 8
3.4Lors du remplissage du réservoir .................................................................................................... 8
3.5Lors du transport .............................................................................................................................. 9
3.6Lors du montage, du nettoyage, de la maintenance et des réparations .......................................... 9
3.7Avant de démarrer ......................................................................................................................... 10
3.9Au travail ........................................................................................................................................ 10
3.10Emission de poussière ................................................................................................................... 11
4Description de l'appareil à moteur ...................................................................................................... 12
4.1Contenu de la livraison .................................................................................................................. 12
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