Page 533 - Foton Workshop Manual - Auman EST-M

Engine section – Engine (Cummins ISF3.8) EG - 17

IN
Failure phenomenon Possible reason Failure elimination
DI
Thermostat broken Replace the thermostat

Coolant temperature
Fan drive or control device failure Check the fan drive and control device
higher than normal EG
Long time idle can cause too low temperature in
value---suddenly
Engine idle time too long
engine oil and coolant
overheated
TR
Cooling system part failed Perform the cooling system diagnosis test

Check the engine oil cooler and replace it if AX
Engine oil cooler failed
necessary

Air compressor cylinder head cracked or with holes Check the cylinder head and gasket of air FR
or gasket leaking compressor
Coolant mixed with
Perform pressure test for the cooling system and ST
Internal coolant leaking
engine oil
check if there is any leakage
Cylinder head gasket leaking Check the cylinder head gasket BR

Cylinder head cracked or with holes Perform the pressure test for the cylinder head
BW
Cylinder body cracked or with holes Check the cylinder body

Check the engine oil level Verify if the engine
EL
Engine oil level higher than specification oil scale calibration and oil sump capacity is

correct Filling engine oil to specified level

Check and clean the crankshaft box respirator
Crankshaft box venting system blocked
and degassing pipe

Air compressor worn excessively or broken inside Replace or reinstall the air compressor

Crankshaft box gas
Check the sealing parts of turbine booster
(gas blowby) too Turbine booster seal leaking
compressor and worm
much
Valve stem clearance too big or valve stem oil seal
Check the valve rod and sealing part
broken

Check if the valve pipe is broken and replace the
Cylinder valve guide pipe worn excessively
cylinder head if necessary
Check if the piston and piston ring is worn or
Piston or piston ring worn or broken
broken

EG-017