How To Use The Demolition Hammer; Grease Replacement - Hitachi H 60MRV Handling Instructions Manual

8. Select the number of strikes (Fig. 8)
CAUTION: Do not make any adjustment of the dial
during operation.
body with one hand can swing you
around, resulting in an injury.
This machine has an electronic controlled circuit
built-in, enabling stepless regulation of the number
of strikes. Make the most of this machine by
adjusting the dial according to the working contents;
chiseling, demolishing, or the quality of the material
to be chiseling or demolishing.
The scale "1" of the dial is for the minimum speed
with 930 strikes per minute, and the scale "6" is
for the maximum speed with 1650 strikes per minute.
Standard number of strikes
Dial Number of strikes/min.
6
5
4
3
2
1
Fig. 6
Fig. 7
Holding the main
1650
1590
1460
1320
1110
930
Dial
Fig. 8

HOW TO USE THE DEMOLITION HAMMER

(Fig. 9)
1. After placing the tip of the tool on concrete surface,
switch ON.
The switch can be turned ON if the trigger is pulled
and OFF when it is released.
If the stopper is pressed while the trigger for the
switch is pulled, even if your finger is released from
the trigger, the switch remains ON - convenient for
continuous operation.
To turn the switch OFF, pull the trigger again, and
then the stopper comes off.
2. By utilizing the empty weight of the machine and
by firmly holding the demolition hammer with both
hands, one can effectively control the subsequent
recoil motion.
Proceed at a moderate work-rate, the use of too
much force will impair efficiency.
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 fully oil sealed construction to protect
against dust incursion and to prevent lubricant leakage.
This machine can be used without grease replenishment
for an extended period of time. However, perform the
grease replacement to extend the service life. 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.
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 case cover and the crank cover
and wipe off the old grease inside (Fig. 10).
Fig. 9
5