Maintenance And Inspection - Hitachi DH 25PA Bedienungsanleitung

2. How to bore (Fig. 16)
(1) Connect the plug to the power source.
(2) A spring is installed in the center pin.
Push it lightly to the wall or the floor perpendicularly.
Connect the core bit tip flush to the surface and
start operating.
(3) When boring about 5 mm in depth the position of
the hole will be established. Bore after that removing
the center pin and the guide plate from core bit.
(4) Application of excessive force will not only decelerate
the working efficiency, but it will deteriorate the tip
edge of the drill bit, resulting in reduced service
life of the rotary hammer.
CAUTION
When removing the center pin and the guide plate,
turn OFF the switch and disconnect the plug from
the receptacle.
3. Dismounting (Fig. 17)
Remove the core bit shank from the rotary hammer
and strike the head of the core bit shank strongly
two or three times with a manual hammer holding
the core bit, then the thread becomes loose and
the core bit can be removed.
LUBRICATION
Low viscosity grease is applied to this rotary hammer so
that it can be used for a long period without replacing
the grease. Please contact the nearest authorized service
center for grease replacement when any grease is leaking
from a loosened screw.
Further use of the rotary hammer with incorrect grease
will cause the machine inefficiency and reduce the service
life.
CAUTION:
A special grease is used with this machine, therefore, the
normal performance of the machine may be badly
affected by use of other grease. Please be sure to let one
of our authorized service center undertaking replacement
of the grease.

MAINTENANCE AND INSPECTION

1. Inspecting the drill bits
Since use of a dull tool will cause motor
malfunctioning and degraded efficiency, replace the
drill bit with new ones or resharpen them without
delay when 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. 18)
The motor employs carbon brushes which are
consumable parts. When they become worn to or
near "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 Fig. 18.
In addition, always keep carbon brushes clean and
ensure that they slide freely within the brush holders.
5. Replacing carbon brushes:
Disassemble the brush caps with a slotted-head
screwdriver. The carbon brushes can then be easily
removed.
6. 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 an 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.
MODIFICATIONS
Hitachi Power Tools are constantly being improved
and modified to incorporate the latest technological
advancements.
Accordingly, some parts (i.e. code numbers and/or
design) may be changed without prior notice.
GUARANTEE
We guarantee Hitachi Power Tools in accordance with
statutory/country specific regulation. This guarantee does
not cover defects or damage due to misuse, abuse, or
normal wear and tear. In case of complaint, please send
the Power Tool, undismantled, with the GUARANTEE
CERTIFICATE found at the end of this Handling
instruction, to a Hitachi Authorized Service Center.
NOTE:
Due to HITACHI's continuing program of research and
development, the specifications herein are subject to
change without prior notice.
IMPORTANT
Correct connection of the plug
The wires of the mains lead are coloured in accordance
with the following code:
Blue: -Neutral
Brown: -Live
As the colours of the wires in the mains lead of this tool
may not correspond with the coloured markings
identifying the terminals in your plug proceed as follows:
The wire coloured blue must be connected to the terminal
marked with the letter N or coloured black. The wire
coloured brown must be connected to the terminal
marked with the letter L or coloured red. Neither core
must be connected to the earth terminal.
NOTE:
This requirement is provided according to BRITISH
STANDARD 2769: 1984.
Therefore, the letter code and colour code may not be
applicable to other markets except The United Kingdom.
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