Maintenance And Inspection - Hitachi CD 7SA Safety Instructions And Instruction Manual

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Dust cover (B)
B
C
Dust cover
(B)
Hook

MAINTENANCE AND INSPECTION

WARNING: Be sure to switch power OFF and disconnect the plug from the receptacle during 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 screws
Regularly inspect all screws and ensure that they
are fully tightened. Should any of the screws be
loosened, retighten them immediately.
WARNING: Using this metal cutting saw 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. 15)
The motor employs carbon brushes which are
consumable parts. Replace the carbon brush with
a new one when it becomes worn to its wear limit.
Always keep carbon brushes clean and ensure that
they slide freely within the brush holders.
Wear Limit
0.67" (17 mm)
12
Dust cover (A)
A
Hole for inserting
the hook
Fig. 13
No. of Carbon Brush
43
0.24" (6 mm)
Fig. 15
When the two special bolts are loosened, dust
covers (A) and (B) can be removed with the cutting
dust still inside. (See Fig. 14)
The cutting dust can then be thrown away without
spilling it.
Dust cover (B)
Dust cover (A)
CAUTION:
●
Using this cutter with a carbon brush which is worn
in excess of the wear limit will damage the motor.
NOTE: Use HITACHI carbon brush No. 43 indicated
in Fig. 15.
5. Replacing carbon brushes
Disassemble the brush caps with a slotted-head
screwdriver. The carbon brushes can then be easily
removed.
6. 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.
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 (i.e. code numbers and/
or design) may be changed without prior notice.
Special bolt
Fig. 14