Page 536 - Foton Workshop Manual - Auman EST-M

EG - 20 Engine section – Engine (Cummins ISF3.8)

Failure phenomenon Possible reason Failure elimination

Check the engine oil level Verify if the engine oil scale
Engine oil level lower than specification calibration and oil sump capacity is correct Filling engine
oil to specified level

Check if the engine oil is contaminated. If the engine oil is
Engine oil too thin or diluted contaminated, refer to the engine oil contamination failure
diagnosis

Engine oil pressure lower than Check the engine oil pressure. If the pressure is low, refer
specification to the engine oil pressure failure diagnosis
Engine too
Main bearing screw loose, worn or not Check the the torque of main bearing screw and check if
noisy---main bearing
correctly tightened the screw is worn

Main bearing broken or excessively worn,
Check if the main bearing is broken, worn excessively and
not correctly assembled or wrong bearing
if the part number is correct.
installed

Crankshaft journal broken or
Check the crankshaft journal
out-of-round

Flywheel or flexible connecting disc Check the flywheel or flexible connecting disc and
screw loose or broken installing screw
Fuel grade not meeting the application or
Use high quality fuel to run the engine
fuel quality too bad

Ceiling mechanism adjustment not
Measure and adjust the top mechanism
correct

Perform diagnosis to find the broken injector and replace
Injector failed
it when necessary
Engine too
noisy---piston Check the piston installation position and if there are bits
Piston assembled incorrectly
on the top of piston

Connecting rod bent or not aligned Dismount and check the connecting rod

Connecting rod wrongly assembled Dismount and check the connecting rod

Piston pin or piston pin sleeve loose, Dismount the piston and check if the piston pin and and
worn or installed incorrectly pin sleeve are broken, worn and correctly installed

EG-020