Grease Replacement; Maintenance And Inspection - Hitachi H 60mc Instruction Book

2. By utilizing the empty weight of the machine and by fi rmly holding the demolition hammer
with both hands, one can eff ectively control the subsequent recoil motion.
Proceed at a moderate work-rate, the use of too much force will impair effi ciency.
CAUTION
After long time of use, the cylinder case becomes hot. Therefore, be careful not to
burn your hands.

GREASE REPLACEMENT

This machine is of full air-tight construction to protect against dust and to prevent lubricant
leakage. This machine can be used without grease supplement for an extended period of time.
However, perform the grease replacement to maintain the service life. Replace the grease as
described below.
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 Hitachi Authorized 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 off and pull out the plug from the
receptacle.
(1) Remove the crank cover and wipe off the
old grease inside. (Fig. 6)
(2) Supply 76 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. At this time, do not
damage or lose the oil seal.
NOTE
The Hitachi Electric Hammer Grease A is of the low viscosity type. When the grease is
consumed, purchase from the Hitachi Authorized Service Center.

MAINTENANCE AND INSPECTION

CAUTION
Be sure to switch power OFF and disconnect the plug from the receptacle to avoid
serious trouble.
19
English
Crank cover
Fig. 6