Maintenance And Inspection - Hitachi DH25DL Handling Instructions Manual

CAUTION
Exercise care in preparing a pilot hole suitable for
the wood screw taking the hardness of the wood into
consideration. Should the hole be excessively small or
shallow, requiring much power to drive the screw into
it, the thread of the wood screw may sometimes be
damaged.
5. Hammering only
Align the " " mark with the "
change lever to set the "Hammering only" function.
(Fig. 8-a)
(1) Mount the bull point or cold chisel.
6. Using depth gauge (Fig. 12)
(1) Loosen the knob on the side handle, and insert the depth
gauge into the mounting hole on the side handle.
(2) Adjust the depth gauge position according to the depth of
the hole and tighten the knob bolt securely.
7. How to use the drill bit (taper shank) and the taper
shank adapter
(1) Mount the taper shank adapter to the rotary hammer.
(Fig. 14)
(2) Mount the drill bit (taper shank) to the taper shank
adapter. (Fig. 14)
(3) Turn the switch ON, and drill a hole to prescribed depth.
(4) To remove the drill bit (taper shank), insert the cotter into
the slot of the taper shank adapter and strike the head of
the cotter with a hammer supporting on the rest. (Fig. 15)
8. Switching between the "SAVE" and the "POWER"
modes
The hammering force of the hammer can be increased or
decreased to conform with intended usage, by operating
the shift knob as per Fig. 16.
Adjust the force to match the usage intended.
(1) "SAVE" mode ... decreased hammering force
This can prevent thin drill bits which are less than 5 mm in
diameter, from being bent or broken.
(2) "POWER" mode ... increased hammering force
○ This can be used to speedily and effi ciently drill holes
when the drill bits which are being used are greater than
5 mm in diameter.
○ This can be used to drill holes into wood or metal.
CAUTION
Do not drill holes in wood with the "SAVE" mode. There
is a likelihood that the motor will burn out because it can
easily lock up due to the low power.
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 service center for grease
replacement when any grease is leaking form loosened
screw.
Further use of the rotary hammer despite the grease shortage
causes damage to reduce the service life.
CAUTION
A specifi c grease (FG-6A) is used with this machine,
therefore, the normal performance of the machine may be
badly aff ected by use of diff erent grease. Please be sure to
let one of our service centers to undertake replacement of
the grease.

MAINTENANCE AND INSPECTION

1. Inspecting the tool
Since use of as dull tool will degrade effi ciency and cause
possible motor malfunction, sharpen or replace the tool
as soon as abrasion is noted.
" mark by rotating the
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. Cleaning on the outside
When the power tool is stained, wipe with a soft dry cloth
or a cloth moistened with soapy water. Do not use chloric
solvents, gasoline or paint thinner, as they melt plastics.
5. Storage
Store the power tool in a place in which the temperature
is less than 40°C and out of reach of children.
NOTE:
Make sure that the battery is fully charged when stored
for a long period (3 months or more). The battery with
smaller capacity may not be able to be charged when
used, if stored for a long period.
6. Service parts list
CAUTION
Repair, modifi cation 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 modifi ed to incorporate the latest technological
advancements.
Accordingly, some parts may be changed without prior
notice.
Important notice on the batteries for the Hitachi
cordless power tools
Please always use one of our designated genuine
batteries. We cannot guarantee the safety and
performance of our cordless power tool when used with
batteries other than these designated by us, or when
the battery is disassembled and modifi ed (such as
disassembly and replacement of cells or other internal
parts).
NOTE
Due to HITACHI's continuing program of research and
development, the specifi cations herein are subject to
change without prior notice.
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