Page 535 - Foton Workshop Manual - Auman EST-M

Engine section – Engine (Cummins ISF3.8) EG - 19

IN

Failure phenomenon Possible reason Failure elimination
DI
Disconnect the driving system Check if the engine is
The drive system is too noisy
noisy
EG
Engine suspension worn, broken or not
Check the engine suspension and replace it if necessary
correct
TR
Ceiling mechanism adjustment not correct Measure and adjust the top mechanism

Check if the rocker arm, rocker arm shaft and valve are AX
Ceiling mechanism parts broken
broken or worn excessively

Perform diagnosis to find the broken injector If FR
Injector failed
necessary, replace the injector

Flywheel or flexible connecting disc screw Check the flywheel or flexible connecting disc and ST
Engine too noisy loose or broken installing screw

Side gap at gear system too big or teeth of BR
Check the gear backlash and gear teeth
gear broken
BW
Noise of main bearing or connecting rod Refer to engine noise too big-connecting rod or engine
bearing noise too big-main bearing failure diagnosis

Refer to engine noise too big-turbine booster failure EL
Turbine booster noise
diagnosis

Refer to engine noise too big-combustion knock failure
Combustion noise too big
diagnosis

Check if the piston and piston ring is broken. If
Piston or piston ring worn or broken
necessary, replace them

Fuel grade not meeting the application or
Use high quality fuel to run the engine
fuel quality too bad

Air in fuel system Check if there is air in the fuel system

Coolant temperature higher than Refer to coolant temperature higher than normal

specification value—gradually too hot failure diagnosis

Engine too
Ceiling mechanism adjustment not correct Measure and adjust the top mechanism
noisy---combustion
knock Perform diagnosis to find the broken injector and
Injector failed
replace it if necessary

Camshaft timing not correct (after the
Check the gear driving system timing
engine is reassembled or serviced)

Check the piston installation position and if there are
Piston assembled incorrectly
bits on the top of piston

EG-019