Page 476 - Foton Workshop Manual - Auman EST-M

DI - 422 Diagnosis - Mechanical fault diagnosis

Failure phenomenon Possible reason Failure elimination

Refer to engine running rough or misfiring failure
Engine misfiring
diagnosis

Verify if the idle speed setup is correct Increase
Engine idle speed too low
the idle speed
Check if the fan hub, generator, compressor and
Belt driving accessory failed hydraulic pump interfere Separate the belt driving
accessories and check if there is vibration

Fan loose, broken or not balanced Check the fan

Check the hydraulic pump and air compressor
Gear driving accessories failure Separate the gear driving accessories and check if
Engine vibration too much there is vibration
Engine suspension worn, broken or not
Check the engine suspension
correct

Compare the drving system parts with the engine
Dynamic driving system parts failure or
and equipment specifications Separate the driving
not correct
system parts and check if there is vibration

Flywheel or flexible connecting disc screw Check the flywheel or flexible connecting disc
loose or broken and installing screw

Flywheel housing not aligned Check the flywheel housing alignment
Separate the engine oil and check the filter to
Engine broken internally
determine the possible broken part

DI-422