Maintenance And Inspection - Hitachi Koki G 10SR2 Safety Instructions And Instruction Manual

MAINTENANCE AND INSPECTION

WARNING:
1. Replacing the depressed center wheel
Replace the depressed center wheel when it has been worn out to about 2-3/8" (60mm)
in external diameter. Confirm 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. Confirm 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 (Fig. 6)
The motor employs carbon brushes which are
consumable parts. Replace the carbon brush
with a new one when it becomes worn to its
wear limit. Always keep carbon brushes clean
and ensure that they slide freely within the
brush holders.
CAUTION: Using this grinder with a carbon brush which is worn in excess of the wear
limit will damage the motor.
NOTE: Use HITACHI carbon brush No. 21 indicated in Fig. 6.
Replacing carbon brushes:
Remove the brush caps (Fig. 1) with a slotted screwdriver. The carbon brushes can then
be easily removed.
5. 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.
6. Service parts list
CAUTION: Repair, modification and inspection of Hitachi Power Tools must be carried
out by an Hitachi Authorized Service Center.
All manuals and user guides at all-guides.com
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.
No. of carbon
brush
Wear limit
21
0.24" (6mm)
0.67" (17mm)
Fig. 6
English
15