Page 473 - Foton Workshop Manual - Auman EST-M
P. 473
Diagnosis - Mechanical fault diagnosis DI - 419
Failure phenomenon Possible reason Failure elimination IN
Fan drive belt loose Check the belt tension
DI
Fan loose, broken or not balanced Check the fan
The fan clutch, hydraulic pump or EG
Separate each part and check if there is noise
refrigerant compressor too noisy
Check if the intake system and exhaust system TR
Intake or exhaust leaking
leak
Intake pipe or exhaust pipe contacts with Check if the air pipe, chassis and cab are in AX
the chassis or cab contact
Engine oil level higher or lower than Check the engine oil level. If necessary, fill in or FR
specification discharge the engine oil
Engine oil too thin or diluted Check if the engine oil is contaminated ST
Engine oil pressure lower than
Check the engine oil pressure
specification BR
Coolant temperature higher than Refer to coolant temperature higher than normal
BW
specification value—graually too hot failure diagnosis
Disconnect the driving system Check if the
The drive system is too noisy EL
engine is nosiy
Engine too noisy
Engine suspension worn, broken or not Check the engine suspension and replace it if
correct necessary
Ceiling mechanism adjustment not correct Measure and adjust the top mechanism
Check if the rocker arm, rocker arm shaft and
Ceiling mechanism parts broken
valve are broken or worn excessively
Perform diagnosis to find the broken injector If
Injector failed
necessary, replace the injector
Flywheel or flexible connecting disc screw Check the flywheel or flexible connecting disc
loose or broken and installing screw
Side gap at gear system too big or teeth of
Check the gear backlash and gear teeth
gear broken
Refer to engine noise too big-connecting rod or
Noise of main bearing or connecting rod
engine noise too big-main bearing failure
bearing
diagnosis
Refer to engine noise too big-turbine booster
Turbine booster noise
failure diagnosis
Refer to engine noise too big-combustion knock
Combustion noise too big
failure diagnosis
DI-419
