6
English
3. Extension cord
When the work area is removed from the power source,
use an extension cord of suffi cient thickness and rated
capacity. The extension cord should be kept as short
as practicable.
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 shown 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 during
work. Do not hold by the grip (A) during work. If you
pull it by mistake, the bull point could jump out.
7. Move the side handle
For bar type handle
Fixing the side handle (Fig. 4).
(1) Rotate the side handle in a clockwise direction to
secure it.
(2) Set the side handle to a position that is suited to the
operation and then securely tighten the side handle.
For D type handle
The side handle can be fi xed at any desired position;
360 degrees, and can also be fi xed at any position in
the back-and-forth direction.
(1) Loosen the handle by turning the grip in the direction
of
as shown in Fig. 5.
(2) Adjust it to a position where vertical (up-and-down)
operation can be facilitated as illustrated in Fig. 6, Fig.
7, and Fig. 8.
(3) Turn the grip in the direction of
and fi x the handle.
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 fi nger 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
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.
(1) Remove the crank cover and wipe off the old grease
inside. (Fig. 10)
(2) Supply 76 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. 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 power OFF and disconnect the plug
from the receptacle to avoid serious trouble.
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. 11)
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.