How To Use The Demolition Hammer; How To Replace Grease; Maintenance And Inspection - Hitachi H 55SA Handling Instructions Manual

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HOW TO USE THE DEMOLITION HAMMER

(Fig.2)
1. After placing the tip of the tool in the base hole, 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.

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
authorized HITACHI Service Center. Proceed for
replacement of grease.
2. Grease Replacement
CAUTION
Before replacing the grease, turn the power off and pull
out the power plug.
(1) Remove the crank cover and wipe off the grease inside.
(Fig. 3)
(2) Supply 30 g of HITACHI Electric Hammer Grease A to
the crank case.
(3) After replacing the grease, install the crank case
securely.
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

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. 5)
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.
○ Replacement procedure
Loosen the set screw and remove the cap cover.
Remove the brush cap and carbon brush. After
replacing the carbon brush, do not forget to tighten
the brush cap securely and to install the cap cover.
18
5. 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.
MODIFICATION
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.
Information concerning vibration
Vibration total values (triax vector sum) determined
according to EN60745.
Chiselling:
a
Vibration emission value
Uncertainty K = 1.5 m/s
2
The declared vibration total value has been measured in
accordance with a standard test method and may be used
for comparing one tool with another.
It may also be used in a preliminary assessment of exposure.
WARNING
○ The vibration emission during actual use of the power
tool can diff er from the declared total value depending on
the ways in which the tool is used.
○ Identify safety measures to protect the operator that
are based on an estimation of exposure in the actual
conditions of use (taking account of all parts of the
operating cycle such as the times when the tool is
switched off and when it is running idle in addition to the
trigger time).
h , Cheq = 15.6 m/s
2