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18
MAINTENANCE AND INSPECTION
CAUTION:
Pull out battery before doing any inspection or maintenance.
1. Inspecting the drill bits
Since use of a dull tool will cause motor
malfunctioning and degraded efficiency, replace
the drill bit with a new one or resharpening without
delay when abrasion is noted.
2. Check the Screws
Loose screws are dangerous. Regularly inspect
them and make sure they are tight.
CAUTION:
Using this power tool with loosened, screws is
extremely dangerous.
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. 17)
For your continued safety and electrical shock
protection, carbon brush inspection and
replacement on this tool should ONLY be
performed by a HITACHI AUTHORIZED SERVICE
CENTER.
5. How to replace grease
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 service center for grease replacement
when any grease is leaking from loosened screw.
Further use of the rotary hammer despite the
grease shortage causes seizure to reduce the
service life.
CAUTION:
A specific 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 service agents
undertake replacement of the grease.
6. Check for Dust
Dust may be removed with a soft cloth or a cloth
dampened with soapy water.
Do not use bleach, chlorine, gasoline or thinner,
for they may damage the plastics.
7. Disposal of the exhausted battery
WARNING:
Do not dispose of the exhausted battery. The
battery must explode if it is incinerated. The
product that you have purchased contains a
rechargeable battery. The battery is recyclable. At
the end of it’s useful life, under various state and
local laws, it may be illegal to dispose of this
battery into the municipal waste stream. Check
with your local solid waste officials for details in
your area for recycling options or proper disposal.
8. Storage
Storing in a place below 104°F (40°C) and out of
the reach of children.
9. Service and repairs
All quality power tools will eventually require
servicing or replacement of parts because of wear
from normal use. To assure that only authorized
replacement parts will be used, all service and
repairs must be performed by a HITACHI
AUTHORIZED SERVICE CENTER, ONLY.
10. 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.
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.
01Eng_DH25DAL_US 9/14/07, 20:4018