Engine Oil Pressure Gauge
Notice: A sudden decrease or absence of engine oil pressure may indicate mechanical failure. Bring the vehicle to a safe stop and investigate the cause to prevent further damage. Do not operate the engine until the cause has been determined and corrected.
See Fig. for an example of the engine oil pressure gauge. If the engine oil pressure falls below the preset levels shown in Table., first the check engine lamp will illuminate, and, if the condition does not improve, the stop engine lamp will also illuminate and the buzzer will sound. At this point, the engine will derate or shut down, depending on the type of engine protection system installed.
Table 1, Oil Pressure Specifications
|
Oil Pressure Specifications 1 |
||
|---|---|---|
|
Engine Model |
Pressure at Idle RPM |
Pressure at Rated RPM |
|
Mercedes-Benz MBE900 2 |
50 psi (345 kPa) |
50 psi (345 kPa) |
|
Cummins ISB |
10 psi (69 kPa) |
30 psi (207 kPa) |
- Oil pressures are given with the engine at operating temperature. With the engine cold, oil pressure may be higher. Individual engines may vary from the listed pressures; observe and record pressures when the engine is new to create a guide for checking engine condition.
- EPA07 MBE900 engines are equipped with an oil pressure switch. When above minimum pressure, the dash gauge will display the values listed in this table. If below minimum oil pressure, the dash gauge will read 0 psi.
Table 1, Oil Pressure Specifications
