Grease Replacement; Maintenance And Inspection - Hitachi H 45SR Handling Instructions Manual

English
5. Installing Tools
CAUTION:
Be sure to switch power OFF and disconnect the plug
from the receptacle to avoid serious trouble.
NOTE:
Concerning the tools such as bull points and cutters,
be sure to use separately sold genuine parts that are
designated by HITACHI.
(1) Wipe off and clean up the shank section of the tool,
and apply grease or machine oil onto it.
(2) As shown in Fig. 4, pull grip (A) in the direction of
and insert the tool into a hole of the front cap.
(3) Adjust the hexagonal hole 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. 5)
6. Installing the dust cover
CAUTION:
Be sure to switch power OFF and disconnect the plug
from the receptacle to avoid serious trouble.
When the dust cover has been seated over the grip (A),
then dust will be prevented from getting into the tool
chuck during operation.
Install the dust cover as follows.
(1) Install the tool into the tool chuck.
(2) Insert the dust cover starting from the tip of the tool.
(3) Press the tool all the way in, then seat the dust cover
on the grip (A) as shown in Fig. 6.
(4) When installing tools such as cutters, insert the dust
cover into the tool and install the tool onto the tool
chuck before seating the dust cover on the grip (A).
7. Removing Tool
As shown in Fig. 4, pull grip (A), and pull out the tool.
CAUTION:
Be sure to grip the hanle and side handle or grip (B)
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. 7)
1. After placing the tip of the tool on concrete surface,
switch ON.
2. By utilizing the 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 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.
5
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. 8)
(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 an authorized Hitachi Service
Center.

MAINTENANCE AND INSPECTION

1. Inspecting the tool
Since use of a dull tool will degrade efficiency 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. 9)
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 figure. 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