6
OPERATING INSTRUCTIONS
Installing the wheel guard (Fig. 1 & 2)
Important:
Always be sure that the tool is switched off and
unplugged before installing or removing the wheel guard.
Mount the wheel guard with the tab on the wheel guard
band aligned with the notch on the bearing box. Then
rotate the wheel guard 180° clockwise (for 9523NB) or
counterclockwise (for 9524NB and 9525NB). Be sure to
tighten the screws securely.
Side grip (auxiliary handle) (Fig. 3)
For 9524NB and 9525NB
For your own safety, always use the side grip. The side
grip can be installed on either side of the tool.
Installing or removing the depressed center
wheel (Fig.4 & 5)
Important:
Always be sure that the tool is switched off and
unplugged before installing or removing the wheel.
Mount the inner flange onto the spindle. Fit the wheel on
over the inner flange and screw the lock nut onto the
spindle.
Press the shaft lock to prevent spindle rotation, then use
the lock nut wrench to tighten the lock nut securely.
WARNING:
Only actuate the shaft lock when the spindle is not mov-
ing.
Switching ON and OFF (Fig. 6)
CAUTION:
Before plugging in the tool, always check to see that the
switch actuates properly and returns to the “OFF” posi-
tion when the rear of the switch lever is depressed.
To switch on, depress the rear of the switch lever and
push it forward. Then depress the front of the switch lever
to lock it.
To switch off, depress the rear of the switch lever.
Operation (Fig. 7)
Keep the edge of the wheel or disc at an angle of about
15°–30° to the workpiece surface. During the break-in
period with a new wheel, do not work the tool in the B
direction. It will cut into the workpiece. Once the edge of
the wheel has been rounded off by use, the wheel may
be worked in both A and B directions.
WARNING:
• It should never be necessary to force the tool. The
weight of the tool applies adequate pressure. Forcing
and excessive pressure could cause dangerous wheel
breakage.
• Continued use of a worn-out wheel may result in wheel
explosion and serious personal injury. Depressed cen-
ter wheel should not be used after it has been worn
down to 75 mm for Model 9523NB or 90 mm for Models
9524NB and 9525NB in diameter.
MAINTENANCE
CAUTION:
Always be sure that the tool is switched off and
unplugged before carrying out any work on the tool.
Replacing carbon brushes (Fig. 8 & 9)
Whenever carbon brushes must be replaced, they cut out
the tool automatically. When this occurs, replace both
carnon brushes at the same time. Use only identical car-
bon brushes.
To maintain product safety and reliability, repairs, mainte-
nance or adjustment should be carried out by a Makita
Authorized Service Center.
