Maintenance And Inspection - Hitachi C 10FSH Safety Instructions And Instruction Manual

MAINTENANCE AND INSPECTION

WARNING:
To avoid an accident or personal injury, always confi rm that the trigger switch is turned
OFF and the power plug has been disconnected from the receptacle before performing
any maintenance or inspection of this tool.
1. Inspecting the saw blade
Always replace the saw blade immediately upon the fi rst sign of deterioration or damage.
A damaged saw blade can cause personal injury and a worn saw blade can cause ineff ective operation and
possible overload to the motor.
CAUTION:
Never use a dull saw blade. When a saw blade is dull, its resistance to the hand
pressure applied by the tool handle tends to increase, making it unsafe to operate
the power tool.
2. Adjusting a loose slide pipe
8mm Hex. Socket
Set Screw
Holder (A) Bushing
Fig. 52
3. Inspecting the carbon brushes (Fig. 53 and Fig. 54)
The carbon brushes in the motor are expendable parts.
If the carbon brushes become excessively worn, motor trouble might occur.
Therefore, inspect the carbon brushes periodically and replace them when they have become worn to the
wear limit line as shown in Fig. 53.
Also, keep the carbon brushes clean so that they will slide smoothly within the brush holders.
The carbon brushes can easily be removed after removal of the brush caps (see Fig. 54) with a slotted (minus)
screwdriver.
NOTE:
When replacing the carbon brushes, use only Hitachi carbon brushes having "43" in the last
two digit of its Code No. (see Fig. 53). If you use other carbon brushes, the electric brake
will not operate.
1/4" (6mm)
11/16" (17mm)
4. About Handling the Motor (see Fig. 1)
Winding of the motor is said to be the heart of this tool. Exercise utmost caution not to damage the winding by
exposing it to wash oil or water.
NOTE:
Accumulation of dust and the like inside the motor can result in a malfunction.
After using the motor for 50 hours or so, carry out no-load running, and blow in the dry air
from a wind hole at the motor's rear. Such action is eff ective to discharge dust and the like.
5. Inspecting the screws
Regularly inspect each component of the power tool for looseness.
Re-tighten screws on any loose part.
WARNING:
To prevent personal injury, never operate the power tool if any components are loose.
6. Inspecting the lower guard for proper operation
Before each use of the tool, test the lower guard (see Fig. 8) to assure that it is in good condition and that it
moves smoothly.
Never use the tool unless the lower guard operates properly and it is in good mechanical condition.
After extended use of the power tool, the slide pipe (A) and the bushing can
become loose due to vibration. Never operate the tool if any components
8mm Nut
are loose to avoid personal injury.
(1) Loosen the 8mm nut and tighten the two 8mm hexagon socket set
screws until the power tool operates smoothly without looseness.
(2) Properly tighten the 8mm nut after completing these adjustment.
Slide Pipe (A)
Wear Limit Line
43
No. 43 indicates the last
two numbers of carbon
brush Code No.
Fig. 53
Groove for Driver Brush Cap
Fig. 54
English
27