Page 534 - Foton Workshop Manual - Auman EST-M

EG - 18 Engine section – Engine (Cummins ISF3.8)

Failure phenomenon Possible reason Failure elimination

Fuel level low in the fuel tank Filling oil tank

Fuel leaking Check if the fuel pipe, fuel joint and fuel filter leak

Fuel inlet resistance Check the fuel inlet resistance

Check if there is air in the fuel system. Thoroughly
Air in fuel system
Starting fuel pressure discharge the air in the fuel system
too low
Fuel joint loose Tighten all the fuel pipe joints and connection
The fuel suction standpipe in the fuel tank
Check and repair the standpipe
is disconnected

Check the output pressure of high pressure oil pump and
High pressure oil pump failed
replace it if necessary.

Use a diagnostic tester to detect whether the reading of the
opening percentage of the accelerator or joystick is correct
Accelerator pedal Accelerator pedal or
and it shall be 100%, when the pedal is pressed and it
failure
shall be 0, when the pedal is released. If necessary,
The engine reduces calibrate the accelerator pedal
speed slowly
Perform the test of stopping oil for a single cylinder and
Injector failed
replace the injector if necessary

Check if the clutch is broken. Repair or replace it when
Clutch failed or not working correctly
necessary

Fan drive belt loose Check the belt tension
Fan loose, broken or not balanced Check the fan

The fan clutch, hydraulic pump or
Separate each part and check if there is noise
refrigerant compressor too noisy

Intake or exhaust leaking Check if the intake system and exhaust system leak

Intake pipe or exhaust pipe contacts with
Check if the air pipe, chassis and cab are in contact
the chassis or cab
Engine too noisy
Engine oil level higher or lower than Check the engine oil level. If necessary, fill in or
specification discharge the engine oil

Engine oil too thin or diluted Check if the engine oil is contaminated

Engine oil pressure lower than
Check the engine oil pressure
specification

Coolant temperature higher than Refer to coolant temperature higher than normal
specification value—gradually too hot failure diagnosis

EG-018