How To Use The Demolition Hammer; Maintenance And Inspection - Hitachi Koki H 90SE Instrucciones De Manejo

4. Mounting an accessory, such as a bull point, a cutter,
etc.
CAUTION:
Be sure to switch OFF and disconnect the attachment
plug from the receptacle to avoid a serious accident.
NOTE:
For accessories such as a bull point and a cutter, use
only Hitachi genuine parts.
* 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
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)
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. Pull the trigger switch after applying the tip of the bit
to the crushing position.
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.
This Demolition Hammer is equipped with a spring
cushion on the handle so that chipping vibration is
not conveyed to the operator.
Operate this Demolition Hammer without forcing the
handle too strongly.
CAUTION
Sometimes the power tool does not begin the striking
stroke even when the motor rotates because the oil
has become thick.
If the power tool is used at low temperatures or if it is
used after a long idle time, this Demolition Hammer
should be kept running in for about five minutes in
order to warm it up.
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 switch 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. 5)
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. 5. In
addition, always keep carbon brushes clean and
ensure that they slide freely within the brush holders.
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