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HOW TO REPLACE GREASE
This machine is of 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.
1.
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.
2.
Grease replenishment
CAUTION
Before replenishing the grease, turn the power off
and pull out the power plug.
(1)
Remove the crank cover and wipe off the grease inside.
(Fig. 18)
(2)
Supply 30g of Hitachi Electric Hammer Grease A
(Standard accessory, contained in tube) to the crank case.
(3)
After replenishing the grease, install the crank cover securely.
NOTE
The Hitachi Electric Hammer Grease A is of the low viscosity type. If necessary purchase
from an Hitachi authorized Service center.
MAINTENANCE AND INSPECTION
1.
Inspecting the tool
Since use of a dull tool will degrade effi 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.
4.
Inspecting the carbon brushes (Fig. 19)
The Motor employs carbon brushes which are
consumable parts. When they become worn to
or near the "wear limit", it could result in motor
trouble. When an auto-stop carbon brush is
equipped, the motor will stop automatically.
At that time, replace both carbon brushes with
new ones which have the same carbon brush
Numbers shown in the fi gure. In addition, always keep carbon brushes clean and ensure
that they slide freely within the brush holders.
17 mm
26
Crank cover
Fig. 18
Wear limit
73
7 mm
No. of Carbon Brush
Fig. 19
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