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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.
Grease replacement period
After purchase, replace grease after every 6 months of usage. Ask for grease
replacement at the nearest HITACHI Authorized Service Center. Proceed for
replacement of grease.
Grease replenishment
CAUTION: Before replenishing the grease, turn the power off and pull out the
power plug.
(1) Remove the crank case cover and wipe
off the grease inside.
(2) Apply 0.7 oz (20 g) of HITACHI Electric
Hammer Grease A (standard accessory,
contained in tube) to the crank case.
As the tube contains 1 oz (30 g) of
grease, supply 2/3 of the contained
grease.
(3) After replenishing the grease, install the
crank case securely.
NOTE: The HITACHI Electric Hammer
Grease A is of the lower
viscosity type. When the
supplied
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.
18
grease
tube
is
Crank Case Cover
Fig. 21
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