Page 531 - Foton Workshop Manual - Auman EST-M

Engine section – Engine (Cummins ISF3.8) EG - 15

Failure phenomenon Possible reason Failure elimination IN

Coolant level higher than specification Check the coolant level
DI
Check if the cooling water pipes and relevant parts
External coolant leaking
leak

Radiator cover not correct or failed or low EG
Check the radiator pressure cover
specification in standing pressure
Cooling system hose blocked or leaking Check the radiator hose TR
Filling pipe or degassing pipe blocked, choked Check if the degassing pipe and filling pipe are
or pipeline arrangement not correct arranged correctly and if they are blocked AX

Engine too hot
Air or burnt mixed gas getting into the cooling Check if there is air or burnt mixed gas in the FR
Coolant loss
system cooling system

Check if there is coolant leakage in the engine oil
Engine oil cooler leaking ST
cooler

Air compressor cylinder head cracked or with Check if there is coolant mark on the intake and
BR
holes or gasket leaking exhaust pipes of air compressor

Perform pressure test for the cooling system and
Internal coolant leaking BW
check if there is any leakage in coolant

Cylinder head gasket leaking Check the cylinder head gasket
EL
Perform the pressure test for the cylinder head and
Cylinder head or body cracked
check the cylinder body

Current electric error code is current or Read the error codes and perform service on the

non-current error code high frequency counter failures in corresponding with the error codes

Check the air-air cooler, AC condenser and
Air-air cooler radiation fin
radiation fin. Clean them if necessary
Add coolant to the specified height and check if
Coolant level lower than specification
the cooling system leaks
Verify the concentration of anti-freeze fluid in the
Mixing ratio of anti-freezing liquid and water in
Coolant temperature coolant Add anti-freezing liquor or water to the
coolant not correct
too high correct concentration
The fan shield is broken or missed, or the air Check the shield and deflector. If necessary,
deflector is broken or missed repair, replace or install it

Check the fan drive belt. If necessary, replace the
Fan drive belt broken or loose
belt

Fan drive or control device failure Check the fan drive and control device

Test the thermometer and sensor. If necessary,
Coolant thermometer or sensor failed
repair or replace

EG-015