Troubleshooting - Hitachi CM 75EBP Handling Instructions Manual

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.

TROUBLESHOOTING

Condition
Engine does not start
Engine starts but immediately stalls
Abnormal vibration
Engine starts, but the cut-off wheel
does not rotate
Engine does not stop
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.
Probable Cause
No fuel or low fuel
Fuel is not in the carburetor
Old fuel
Spark plug is wet
The fuel pipe is bent or detached
Carburetor failure
Spark plug failure
Electrical system failure
No fuel or low fuel
Fuel is not in the carburetor
The choke is closed
Carburetor failure
Spark plug failure
Clogged air fi lter
Faulty mounting of the cut-off wheel
Deformation of the cut-off wheel
Anti-vibration system failure
Belt is loose
Belt is too tight
Belt is out of pulleys
Electrical system failure
13
Remedy
Supply fuel
Supply fuel and push priming pump a
few times.
Supply new fuel
1. Remove spark plug and dry it
2. Pull starter and dry the fuel inside
the engine
Consult a Hitachi Authorized Service
Center
Consult a Hitachi Authorized Service
Center
Replace spark plug or correct the gap
Consult a Hitachi Authorized Service
Center
Supply fuel
Supply fuel and push priming pump a
few times.
Push choke lever securely
Consult a Hitachi Authorized Service
Center
Replace spark plug or correct the gap
Clean the air fi lter
Please refer to "Assembly of cut-off
wheel"
Replace the cut-off wheel
Consult a Hitachi Authorized Service
Center
Please refer to "Adjustment of belt"
Please refer to "Replacing of belt"
Consult a Hitachi Authorized Service
Center
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