Maintenance And Inspection - Hitachi Koki H 60MR Bedienungsanleitung

English
MOUNTING AND OPERATION
Action
Mounting a tool
Deciding working position of tool
Move the side handle
Select the number of strikes*
(applicable only to H60MRV)
Switch operation
How to use the demolition hammer*
Replacing carbon brushes
Selecting accessories
*1 CAUTION: Do not make any adjustment of the dial
during operation. Holding the main 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
6
5
4
3
2
1
*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 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 off and pull
out the plug from the receptacle.
Figure Page
1 91
2 91
3 91
1
4 91
5 92
6 92
2
7 92
― 93
Number of strikes/min.
1650
1590
1460
1320
1110
930
(1) Remove the crank case cover and the crank cover and
wipe off the old grease inside.
(2) Supply 80 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 case cover
and 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 an authorized Hitachi Service Center.

MAINTENANCE AND INSPECTION

CAUTION
Be sure to switch OFF and disconnect the attachment
plug from the receptacle to avoid a serious accident.
1. Inspecting accessories
Since use of a dull accessory, such as a bull point, a
cutter, etc. will degrade effi ciency and cause possible
motor malfunction, sharpen or replace with a new one 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. 7)
The Motor employs carbon brushes which are
consumable parts. When they become worn to or near
the "wear limit" ⓐ, it results 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 Fig. 7. In addition,
always keep carbon brushes clean and ensure that they
slide freely within the brush holders.
5. Replacing carbon brushes
Loosen the set screws ⓒ and remove the tail cover ⓓ.
Remove the brush caps ⓔ and carbon brushes ⓕ. After
replacing the carbon brushes, do not forget to tighten the
brush caps securely and to install the tail cover.
CAUTION
In the operation and maintenance of power tools, the
safety regulations and standards prescribed in each
country must be observed.
GUARANTEE
We guarantee Hitachi Power Tools in accordance with
statutory/country specifi c regulation. This guarantee does
not cover defects or damage due to misuse, abuse, or
normal wear and tear. In case of complaint, please send
the Power Tool, undismantled, with the GUARANTEE
CERTIFICATE found at the end of this Handling instruction,
to a Hitachi Authorized Service Center.
4