Maintenance And Inspection - Hitachi Koki C 7UR Mode D'emploi

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.
NOTE:
Use HITACHI carbon brush No. 38 indicated in Fig. 17.
4. Replacing carbon brushes:
Remove the brush caps with a slotted-head screwdriver. The
carbon brushes can then be easily removed. (Fig. 18)
5. Performance checkup and maintenance of lower guard
Keep the lower guard 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 perpendicularity be lost for some
reason, adjust in the following manner.
Wear limit
38
(6 mm) 0.24"
No. of carbon
0.67" brush
(17 mm)
Fig. 17
Brush Cap
Slotted-head
Screwdriver
Fig. 18
English
15