Page 543 - Foton Workshop Manual - Auman EST-M

Engine section – Engine (Cummins ISF3.8) EG - 27

IN

Failure phenomenon Possible reason Failure elimination
DI
Coolant temperature lower than Refer to coolant temperature lower than normal value

specification failure diagnosis
EG
Engine oil not meeting the specification
Replace the engine oil or filter
of working condition
TR
Engine oil pressure switch, pressure Measure the engine oil pressure Run the engine and

Engine oil pressure gauge or sensor failed or installation compare the reading with the vehicle pressure gauge or
AX
high position not correct engine oil pressure sensor/switch

Measure the engine oil pressure Run the engine and
Failure of oil pressure sensor/switch or FR
compare the reading with the vehicle pressure gauge or
circuit installed in the engine
engine oil pressure sensor/switch
ST
Failure in the engine oil pressure Check if the installed engine oil pump part number is

regulator of main oil way correct
BR
Engine oil level higher or lower than Check the engine oil level. If necessary, fill in or

specification discharge the engine oil
BW
Check if there is external leakage in the engine. Tighten

Engine oil leaking the crews, pipe plugs and joints. If necessary, replace the
EL
gasket

Engine oil not meeting the specification
Replace the engine oil or filter
of working condition

Engine oil contaminated by coolant or
Refer to engine oil contamination failure diagnosis
fuel

Coolant temperature higher than Refer to coolant temperature higher than normal

Engine oil pressure specification value—gradually too hot failure diagnosis

low
Failure in the engine oil pressure Check the main oil way engine oil pressure regulator

regulator of main oil way assembly

Engine oil suction pipe or transfer pipe
Dismount and check the oil sump or oil suction pipe
loose or broken, gasket or O-ring leaking

The oil pressure sensor/switch or pipeline Dismount the front gear chamber to check if the coolant

on the engine is blocked blocks the engine oil pressure sensor/switch terminal

Engine oil pump failed Check the engine oil pump

Engine oil cooler blocked Check the engine oil cooler

Engine oil temperature exceeding Refer to engine oil temperature higher than specification
specification failure diagnosis

EG-027