Monitoring Engine Operation; Charge Current; Oil Pressure - Mercedes-Benz OM 904 LA Operating Instructions Manual

Operation

Monitoring engine operation

Charge current

The charge current indicator lamp must go
out after the engine has started.
4
Charge current indicator lamp
If the indicator lamp does not go out or if it
lights up when the engine is running, stop
the engine and check the poly-V-belt.
48
!
Make sure that the poly-V-belt contact
surfaces are not damaged (e.g. torn),
oily or glazed as this could cause the
poly-V-belt to slip.
Do not run the engine without a poly-V-
belt. The alternator and coolant pump
would not be driven, which would result
in engine damage.

Oil pressure

!
After the engine has reached normal
operating temperature, the engine oil
pressure must not fall below:
2.5 bar at rated speed
0.5 bar at idling speed
If the oil pressure falls below these val-
ues, stop the engine and trace the
cause.