Maintenance And Inspection - Hitachi C 7D Handling Instructions Manual

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 (24 V, 5 W), and then
carry out perfect mounting.
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 housing, and then pull out the
light cover in the arrow-marked direction as shown
in Fig. 20.
Light Cover
Convex
Concave
Fig. 20 <Side View>
(2) Push the back of the socket, and remove the socket
and the light bulb together from the housing. (Fig.
21)
(3) Remove the light bulb from the socket. (Fig. 22)
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 housing, align the
socket with the hole of housing while watching the
back of the socket shown in Fig. 21, and insert the
socket until it lightly bumps against the housing.
Back of the Socket
10
Otherwise, the light
Housing
Housing
Fig. 21
Housing
Socket
Fig. 22 <Top View>

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. Check the mounting screws
Loose mounting 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 tooll.
Exercise due care to ensure the winding does not
become damaged and/or wet with oil or water.
4. Inspecting the carbon brushes (Fig. 23)
The motor employs carbon brushes which are
consumable parts. Since and excessively worn
carbon brush can result in motor trouble, replace
the carbon brush with new ones when it becomes
worn to or near the "wear limit". In addition, always
keep carbon brushes clean and ensure that they
slide freely within the brush holders.
NOTE:
When replacing the carbon brush with a new one,
be sure to use the Hitachi Carbon Brush Code No.
999058.
11.5mm
Light Bulb
Wear limit
3mm
Fig. 23