Replacing Light Bulb; Maintenance And Inspection - Hitachi C 18DMR Handling Instructions Manual

* Washer (A) is supplied for 2 types of saw blades
with the hole diameters of 16 mm and 30 mm.
(When buying the Circular Saw, one type of
washer (A) is spplied.)
In case the hole diameter of your saw blade
does not correspond to that of washer (A), please
contact the shop where you purchased the
Circular Saw.
(3) To assure proper rotation direction of the saw blade,
the arrow direction on the saw blade must coincide
with the arrow direction on the saw cover.
(4) Using the fingers, tighten the left-hand bolt retaining
the saw blade as much as possible. Then depress
the lock lever, lock the spindle, and thoroughly
tighten the left-hand bolt.
CAUTION
After having attached the saw blade, reconfirm that
the lock lever is firmly secured in the prescribed
position.

REPLACING LIGHT BULB

CAUTION
Make absolutely sure that the battery is removed
from the main body before replacing the light bulb.
Immediately after the light is turned OFF, the bulb
retains high temperature. Make sure to cool down
the light bulb thoroughly before replacing it so as
to prevent burns.
When replacing the light bulb, check the shape of
base as well as the rating (12 V, 5 W), and then
carry out perfect mounting. Otherwise, the light
bulb can come off and/or cause overheat.
1. Detaching light bulb
(1) Remove the convex part of the light cover from the
concave part of the handle cover, and then pull out
the light cover in the arrow-marked direction as
shown in Fig. 22.
(2) Push the back of the socket, and remove the socket
and the light bulb together from the handle cover
(Fig. 23).
(3) Remove the light bulb from the socket (Fig. 24).
2. Attaching light bulb
Take procedures here that are contrary to the
detaching procedures.
NOTE
When attaching the light bulb to the socket, insert
the light bulb until it lightly bumps against the
socket.
When attaching the socket to the handle cover,
align the socket with the hole of housing while
watching the back of the socket shown in Fig. 24,
and insert the socket until it lightly bumps against
the handle cover.

MAINTENANCE AND INSPECTION

CAUTION
Pull out battery before doing any inspection or
maintenance.
1. Inspecting the saw blade
Since use of a dull saw blade will degrade efficiency
and cause possible motor malfunction, sharpen or
replace the saw blade as soon as abrasion is noted.
CAUTION
If a dull saw blade is used, reactive force is increased
during cutting operation. Avoid the use of the dull
saw blade without repair.
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. Performance checkup and maintenance of lower
guard
Keep the lower guard in good shape for smooth
performance at all times. Be sure to make prompt
repair in case of any malfunction.
5. Adjusting the base and saw blade to maintain
perpendicularity
The angle between the base and the saw blade has
been adjusted to 90°, however should this
perpendicularity be lost for some reason, adjust in
the following manner:
(1) Turn the base face up (Fig. 25) and loosen the wing-
bolt.
(2) Apply a square to the base and the saw blade and
turning the slotted set screw with a slotted-head
screwdriver, shift the position of the base to produce
the desired right angle.
6. Check for dust
Dust may be removed with a clean rag or a cloth
dampened with soapy water.
Do not use bleach, chlorine, gasoline or thinner, for
they may damage the plastics.
7. Storage
Storing in a place below 40°C and out of the reach
of children.
8. 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 genuine
replacement parts must be used, all service and
repairs must be performed by a HITACHI
AUTHORIZED SERVICE CENTER, ONLY.
9. Service parts list
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 may be changed without
prior notice.
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