Maintenance And Inspection - Hitachi C 7SB2 Safety Instructions And Instruction Manual

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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 effi ciency 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. 17)
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.
14
Washer (B)
Hexagonal
Flange Bolt
Fig. 16
Wear limit
38
(6mm) 0.24"
0.67"
(17mm)
Fig. 17
Saw Blade
Washer (A)
No. of carbon
brush