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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:
Using this portable grinder with loosened screws is extremely dangerous.
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.
(2)Use the auxiliary hexagonal wrench or small screwdriver to pull up the edge of the spring that is holding down the carbon brush. Remove the edge of the spring toward the outside of the brush holder.
(3)Remove the end of the
<Assembly>
(1)Insert the end of the
(2)Insert the carbon brush in the brush holder.
(3)Use the auxiliary hexagonal wrench or small screwdriver to return the edge of the spring to the head of the carbon brush.
(4)Mount the tail cover and tighten the D4 tapping screw.
Wear limit | No. of carbon brush | ||
|
|
|
|
|
|
|
|
88
0.24" (6 mm)
0.67" (17 mm)
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. 88 indicated in Fig. 6.
4.Replacing carbon brushes (Fig. 7): <Disassembly>
(1)Loosen the D4 tapping screw retaining the tail cover and remove tha tail cover.
Spring
Carbon Brush | Brush Holder |
Fig. 7
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 a Hitachi Authorized Service Center.
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