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Wrench
Depressed
center wheel
Wheel washer
Spindle
MAINTENANCE AND INSPECTION
WARNING
Be sure to switch power OFF and disconnect the plug from the receptacle during maintenance and
inspection.
Using cracked, deformed or damaged wheels can lead to wheel breakage and resulting serious
injury.
1.
Replacing the depressed center wheel
Replace the depressed center wheel when it has
been worn out to about 2-3/8" (60 mm) in external
diameter. Confi rm that there is no crack or any damage
to the depressed center wheel. If there is a crack or a
transformation in the wheel, replace it immediately.
2.
Inspecting the screws
Regularly inspect all screws and ensure that they
are fully tightened. Should any of the screws be
loosened, retighten them immediately.
WARNING
Using this grinder with loosened screws is extremely
dangerous.
3.
Confi rm that there is no damage in the wheel guard,
the electrical cord and the housing, etc.
Check that the on/off switch operates normally.
4.
Inspecting the carbon brushes
For your continued safety and electrical shock
protection, carbon brush inspection and replacement
on this tool should ONLY be performed by a HITACHI
AUTHORIZED SERVICE CENTER.
12
Wheel nut
Wheel guard
Push button
Fig. 5
CAUTION
Tighten the wheel nut securely and confi rm that
the depressed center wheel does not wobble.
2.
Disassembly
To remove the depressed center wheel, simply
reverse the above-mentioned procedure.
5.
Replacing supply cord
If the supply cord of Tool is damaged, the Tool must
be returned to Hitachi Authorized Service Center for
the cord to be replaced.
6.
Service and repairs
All quality power tools will eventually require servicing
or replacement of parts because of wear from normal
use. To assure that only authorized replacement
parts will be used, all service and repairs must be
performed by a HITACHI AUTHORIZED SERVICE
CENTER, ONLY.
7.
Maintenance of the motor
WARNING
Always wear protective goggles and dust respirators
when blowing air from the tail cover air hole with the
use of an air gun, etc.
Failure to observe this may result in ejected dust
being inhaled or entering your eyes.
The coil on the motor is an important part of the unit.
Make sure that it is not damaged or subject to oil or
water.
