How To Use The Demolition Hammer; Grease Replacement; Maintenance And Inspection - Hitachi H 45MR Handling Instructions Manual

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4. Installing Tools
CAUTION
Be sure to switch power OFF and disconnect the plug
from the receptacle to avoid serious trouble.
NOTE
When using tools such as bull points, cutters, etc.,
make sure to use the genuine parts designated by our
company.
(1) Clean the shank portion of the tool.
(2) As shown in Fig. 1, pull grip (A) in the direction of
and insert the tool into a hole of the front cap.
(3) Adjust the groove position while turning the tool, and
furthermore insert it until it hits the end of the hole.
(4) Return grip (A) to its original position, pull the tool and
make sure it is locked completely. (Fig. 2)
5. Deciding Working Position of Tool
The tool can be turned every 30 degrees and can be
fi xed at the position of 12 steps.
(1) As sho wn in Fig. 3, if the grip (A) is turned in the
Ⓑ
direction of in a state where the grip (B) is pushed
Ⓐ
in the direction of , the blade angle can be changed
freely to any desired position.
(2) Release grip (B) and turn the tool, and make sure that it
is locked completely.
6. Removing Tool
As shown in Fig. 1, pull grip (A), and pull out the tool.
CAUTION
Be sure to grip the handle and side handle or grip (C)
portion during work. Do not hold by the grip (A) during
work. If you pull it by mistake, the bull point could jump out.

HOW TO USE THE DEMOLITION HAMMER

(Fig. 4)
1. After placing the tip of the tool on concrete surface,
switch ON.
2. By utilizing the 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 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.
(1) Remove the crank cover and wipe off the old grease
inside. (Fig. 5)
6
(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
Ⓐ
, 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. 6)
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.
5. Replacing carbon brushes
Loosen the set screw 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.
6. Service parts list
A: Item No.
B: Code No.
C: No. Used
D: Remarks
CAUTION
Repair, modifi cation and inspection of Hitachi Power
Tools must be carried out by a Hitachi Authorized
Service Center.
This Parts List will be helpful if presented with the tool to
the Hitachi Authorized Service Center when requesting
repair or other maintenance.
In the operation and maintenance of power tools, the
safety regulations and standards prescribed in each
country must be observed.
MODIFICATIONS
Hitachi Power Tools are constantly being improved
and modifi ed to incorporate the latest technological
advancements.
Accordingly, some parts (i.e. code numbers and/or
design) may be changed without prior notice.
NOTE
Due to HITACHI's continuing program of research and
development, the specifi cations herein are subject to
change without prior notice.
an authorized Hitachi Service