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MAINTENANCE AND INSPECTION
WARNING:
Be sure to switch power OFF and disconnect the plug during maintenance and
inspection.
Using cracked, deformed or damaged wheels can lead to wheel breakage and
resulting serious inlury.
1. Inspecting the wheel
Ensure that the wheel is free of cracks and surface defects.
2. Inspecting the mounting screws
Regularly inspect all mounting screws and ensure that they are properly
tightened. Should any of the screws be loose, retighten them immediately.
WARNING:
3. 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 portable 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.
4. 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
A:
Item No.
B:
Code No.
C:
No. Used
D:
Remarks
14
Using this portable grinder with loosened screws is extremely
dangerous.
No. of Carbon Brush
Wear Limit
21
0.20" (5 mm)
0.47" (12 mm)
Fig. 6
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