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⅜ Replacing carbon brushes:
(For parts name, refer to Fig. 1)
Loosen the two set screws and remove the tail cover. Remove the brush caps
and carbon brushes. After replacing the carbon brushes, tighten the brush caps
securely and to install the tail cover with securely tightening two set screws.
5. How to replase grease
This machine is full air-tight construction to protect against dust and to prevent
lubricant leakage. Therefore, the machine can be used without lubrication for
long periods. Replace the grease as described below.
⅜ Grease replacement period
You should look at the grease when you change the carbon brush. (See item 4
in the section MAINTENANCE AND INSPECTION.) Ask for grease replacement
at the nearest HITACHI Authorized Service Center. Proceed for replacement of
grease.
⅜ Grease replenishment
CAUTION: Before replenishing the grease, turn the power off and pull out the
power plug.
(1) Disassemble the crank cover and
thoroughly wipe off the old grease
inside. (FIg. 21)
(2) Supply 30g (the standard volume to
cover the connecting rod) of Hitachi
Electric Hammer Grease A in the crank
case.
(3) After replacing the grease, reassemble
the crank cover securely. At this time,
do not damage or lose the oil seal.
NOTE: The HITACHI Electric Hammer
Grease A is of the lower
viscosity type. When the
supplied grease tube is
consumed, purchase from a
HITACHI Autorized Service
Center.
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.
Crank Case Cover
Fig. 21