Hitachi C 12LDH Safety Instructions And Instruction Manual page 25

3. Inspecting the carbon brushes (Fig. 46 and Fig. 47)
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. 46.
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. 47) with a slotted
(minus) screwdriver.
Wear limit line
38
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 effective 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. 7) 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.
7. Storage
After operation of the tool has been completed, check that the following has been performed:
(1) Trigger switch is in OFF position,
(2) Power plug has been removed from the receptacle,
(3) To prevent unauthorized operation of this tool, insert a padlock through the hole in the switch trigger.
When the tool is not in use, keep it stored in a dry place out of the reach of children.
8. Replacement of Poly-V-Belt
Poly-V-belt
Pulley (B)
Fig. 48
No. 38 indicates the last
two numbers of carbon
brush Code No.
Fig. 46
The power of the motor is transmitted to the saw blade by a Poly-
V-Belt. When the Poly-V-Belt is broken or damaged, remove the
Pulley (A)
pulley cover by loosening the three 5 mm screws (see Fig. 2) and
replace the damaged one with the new one.
When connecting the belt on pulleys, first connect 2 or 3 teeth of
Poly-V-Belt to the grooves of the pulley (A) and pulley (B). Then
turning the pulley (A) and pulley (B), connect all teeth of the belt to
the pulleys.
Brush cap
Groove for driver
Fig. 47
English
25