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* It is possible to attach an accessory, such as a bull
point, a cutter, etc., with any of the three types of
the accessory shank portion shapes shown below.
Air Tool Shank Bit
Standard Hex. Shank Bit (Combo Type)
Retaining Groove Bit without Collar
⅜ Mounting air tool shank and standard hexagonal
shank tools.
(1) Clean, then smear the accessory shank portion
grease or machine oil.
(2) Move the retainer to open position A and seat
the accessory, such as a bull point, a cutter, etc.,
in the hexagonal hole in the front cover (See
Fig.1).
(3) Clamp the accessory into place by bringing the
retainer to the clamp position. To make sure that
the accessory is properly mounted, pull on the
accessory (Fig. 2).
⅜ Mounting standard hexagonal shanks and retaining
groove shanks without collars.
(1) Clean, then smear the accessory shank portion
with grease or machine oil.
(2) Move the retainer to position A. Align the
accessory shank portion so that its recessed
portion is under clamp and seat the accessory,
such as a bull point, a cutter, etc., in the hexagonal
hole in the front cover (See Fig. 3).
(3) Clamp the accessory into place by bringing the
retainer to clamp position B. To make sure that
the accessory is properly mounted, pull on the
accessory (Fig. 4).
NOTE
When removing the accessory, such as a bull point,
a cutter, etc., carry out the above procedures in
reverse.
HOW TO USE THE DEMOLITION HAMMER
1. Squeeze the trigger switch after applying the tip of
the bit to the crushing position.
In some cases, it is necessary to punch the tip of the
bit against the crushing position forcibly in order to
begin the striking motion.
This is not due to malfunction of the power tool. It
means that the safe guard mechanism against no-
load striking is working.
2. Operate this Demolition Hammer by utilizing its empty
weight. The performance will not be better even if it is
pressed or thrust forcibly against the work surface.
Hold this Demolition Hammer with a force just
sufficient to counteract the reaction (Fig. 5).
GREASE REPLACEMENT
This Demolition Hammer is of full air-tight construction to
protect against dust and to prevent lubricant leakage.
Therefore, this Demolition Hammer can be used without
lubrication for long periods. Replace the grease as
described below.
Grease Replacement Period
After purchase, replace grease after every 6 months of
usage. Ask for grease replacement at the nearest
authorized Service Center.
MAINTENANCE AND INSPECTION
CAUTION
Be sure to swith OFF and disconnect the attachment
plug from the receptacle to avoid a serious accident.
1. Inspecting this Demolition Hammer
Since use of a dull accessory, such as a bull point, a
cutter, etc. will degrade efficiency 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. Inspecting the retainer (Fig. 1, Fig. 2)
The retainer may become loose due to excessive
use. Always, pay attention to its proper functioning
to securely hold the accessory shank portion. If any
wear and tear is found, bring this Demolition Hammer
to an authorized service center for maintenance
service.
4. 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.
5. 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 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. 6. In
addition, always keep carbon brushes clean and
ensure that they slide freely within the brush holders.
6. Replacing carbon brushes
Loosen the screws (Hexagon socket hd. bolt M4×8) of
the cap covers, then remove the cap covers (Fig. 7).
After removing the brush caps, the carbon brushes
can be removed.
After replacing the carbon brushes, tighten the brush
caps, then mount the cap covers securely.
7. Service parts list
A: Item No.
B: Code No.
C: No. Used
D: Remarks
CAUTION
Repair, modification and inspection of Hitachi Power
Tools must be carried out by a Hitachi Authorized
Service Center.
01Eng_H65SD2_WE 4/19/07, 3:07 PM5