Monthly Maintenance; Quarterly Maintenance - Hitachi CM 75EAP Handling Instructions Manual

NOTE
○ When you remove the spark plug, please take care so
that dust does not get inside the engine.
○ The spark plug should be replaced after about 100
operation hours or earlier if the electrodes are badly
eroded.
Fuel fi lter (Fig. 34)
Remove the fuel fi lter (39) from the fuel tank and thoroughly
wash it in solvent. After that, push the fuel fi lter into the tank
completely.
39
NOTE
If the fuel fi lter (39) is hard due to dust and dirt, it must be
replaced.
Anti-vibration systems (Fig. 35)
Check the springs (40) for any loosening or damage. If
you fi nd any failure in those parts, please contact a Hitachi
Authorized Service Center.
40
40
Replacing of belt
1. Remove nut (9) using the combi box spanner (6)
and loosen the tensioner bolt (11) by rotating it
counterclockwise with the hex. wrench (4). Then,
remove the arm cover (10). (Fig. 11, 12)
2. Loosen the three bolts (41) on the clutch cover (42) and
remove clutch cover (42). (Fig. 36)
4
41
Fig. 34
40
Fig. 35
42
Fig. 36
3. Remove the belt (43) and set a new one in the grooves of
the pulleys (44)(45) securely. (Fig. 37, 38)
44
44
43
4. Before assembling, turn the tensioner bolt (11) and
adjust the length protrusion of the tensioner bolt (11)
from the arm cover (10) to 0 mm (Fig. 39)
0 mm
5. Assemble clutch cover and arm cover by following the
aforementioned steps in reverse.
6. Readjust the tension of the belt. Please refer to
"Adjustment of belt".
Maintenance schedule
Daily maintenance
○ Clean the exterior of the machine.
○ Check that the nut on the arm cover is suffi ciently tightened.
○ Check that the bolts for the cut-off wheel are suffi ciently
tightened.
○ Check that the cut-off wheel does not rotate when the
engine is idling
○ Clean the air fi lter.
Weekly maintenance
○ Check the recoil starter, especially rope.
○ Clean the exterior of the spark plug.
○ Remove the spark plug and check the electrode gap.
Adjust it to 0.6 mm or change the spark plug.
○ Check that the air intake at the recoil starter is not clogged.

Monthly maintenance

○ Rinse the fuel tank with gasoline, and clean fuel fi lter.
○ Clean the exterior of the carburetor and the space
around it.

Quarterly maintenance

○ Clean the cooling fi ns on the cylinder.
○ Clean the fan and the space around it.
○ Clean the carbon of muffl er.
CAUTION
Cleaning of cylinder fi ns, fan and muffl er shall be done
by Hitachi Authorized Service Centers.
12
43
45
Fig. 37
43
Fig. 38
10
11
Fig. 39
45