English
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MAINTENANCE AND INSPECTION
WARNING:
To avoid serious accident, ensure the switch is in the OFF position and
disconnect the plug from the receptacle during maintenance and
inspection.
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 screws
Loose screws are dangerous. Regularly inspect them and make sure they are tight.
CAUTION: Using this power tool with loosened screws is extremely dangerous.
3. Inspecting the carbon brushes (Fig. 20)
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.
CAUTION:
Using this circular saw with a carbon brush which is worn in excess of the wear limit will
damage the motor.
NOTE:
Use HITACHI carbon brush No. 38 indicated in Fig. 20.
4. Replacing carbon brushes:
Remove the brush caps with a slotted-head
screwdriver. The carbon brushes can then be
easily removed. (Fig. 21)
5. Performance checkup and maintenance of
safety cover
Keep the safety cover in good shape for smooth
performance at all times. Be sure to make
prompt repair in case of any malfunction.
6. 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
Wear limit
No. of carbon
brush
Fig. 20
0.24"
(6mm)
38
0.67"
(17mm)
Fig. 21
Brush Cap
Slotted-head
Screwdriver
01Eng_C7SB2_US
7/29/11, 3:23 PM
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