Maintenance And Inspection - Hitachi CD 7SA Handling Instructions Manual

B
Dust cover (B)
When the two special bolts are loosened, dust covers
(A) and (B) can be removed with the cutting dust
still inside. (See Fig. 13)
The cutting dust can then be thrown away without
spilling it.
Dust cover (B)

MAINTENANCE AND INSPECTION

1. Inspecting the carbide tipped saw blade
Since use of a dull saw blade will cause motor
malfunctioning and degraded efficiently, replace with
a new one 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. Fail-
ure 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. 14)
The motor employs carbon brushes which are
consumable parts. Since an excessively worn carbon
brush can result in motor trouble, replace the carbon
brushes with new ones having the same carbon
brush No. shown in the figure when it becomes
worn to or near the "wear limit". In addition, always
keep carbon brushes clean and ensue that they
slide freely within the brush holders.
10
Dust cover (B)
Dust cover (A)
A
C
Hole for
inserting the
hook
Hook
Fig. 12
Special bolt
Dust cover (A)
Fig. 13
6mm
17mm
5. Replacing carbon brushes
Disassemble the brush caps with a slotted-head
screwdriver. The carbon brushes can then be easily
removed.
6. Replacing supply cord
If the supply cord of Tool is damaged, the Tool
must be returned to Hitachi Authorized Service
Center for the cord to be replaced.
7. 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.
NOTE
Due to HITACHI's continuing program of research and
development, the specifications herein are subject to
change without prior notice.
Wear limit
43
No. of carbon brush
Fig. 14