Maintenance - Makita 9526NB Instruction Manual

OPERATING INSTRUCTIONS
Installing the wheel guard (Fig. 1 & 2)
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 9526NB) or
counterclockwise (for 9527NB and 9528NB). Be sure to
tighten the screws securely.
Installing side grip (auxiliary handle) (Fig. 3)
For 9527NB and 9528NB only
Screw the side grip on the tool securely. The side grip
can be installed on either side of the tool, whichever is
convenient.
Installing or removing depressed center wheel
CAUTION:
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. (Fig. 4)
To tighten the lock nut, press the shaft lock firmly so that
the spindle cannot revolve, then use the lock nut wrench
and securely tighten clockwise. (Fig. 5)
WARNING:
Only actuate the shaft lock when the spindle is not mov-
ing.
Switch action (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)
Hold the tool firmly with both hands. Turn the tool on and
then apply the wheel or disc to the workpiece.
In general, 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 griader
in the B direction or 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 in diameter for Model 9526NB or
90 mm for Models 9527NB and 9528NB in diameter.
Use of the wheel after this point is unsafe and it should
be removed from service and rendered unusable by
intentional destruction.
6

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)
Remove and check the carbon brushes regularly.
Replace when they wear down to the limit mark. Keep
the carbon brushes clean and free to slip in the holders.
Both carbon brushes should be replaced at the same
time. Use only identical carbon brushes.
Use a screwdriver to remove the brush holder caps. Take
out the worn carbon brushes, insert the new ones and
secure the brush holder caps.
To maintain product safety and reliability, repairs, mainte-
nance or adjustment should be carried out by a Makita
Authorized Service Center.