English
20
1. 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
authorized Hitachi Service Center.
In the case that you are forced to change the grease by yourself, please follow the following
points.
2. How to replace grease
CAUTION
Before replacing the grease, turn the power o
ff
and pull out the plug from the
receptacle.
(1) Remove the crank cover and wipe o
ff
the old
grease inside. (
Fig. 8
)
(2) Supply 40 g (the standard volume to cover the
connecting rod) of Hitachi Electric Hammer
Grease A to the crank case.
(3) After replacing the grease, install the crank cover
securely.
NOTE
The Hitachi Electric Hammer Grease A is of the
low viscosity type. When the grease is consumed,
purchase from an authorized Hitachi Service Center.
MAINTENANCE AND INSPECTION
1. Inspecting the tool
Since use of a dull tool will degrade e
ffi
ciency and cause possible motor malfunction,
sharpen or replace the tool as soon as abrasion is noted.
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. Failure to do so could result in
serious hazard.
3. Maintenance of the motor
The motor unit winding is the very “heart” of the power tool. Exercise due care to ensure the
winding does not become damaged and/or wet with oil or water.
Crank cover
Fig. 8
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