NHC 250 Oil Pressure

[archmark]

In looking at the AM General M939 series trucks on GP, it seems that every one of them seems to run a different oil pressure, anywhere from 35-95 PSI., low or high miles/hours notwithstanding. Is there a "normal" oil pressure for the AMG M939 series or do they really vary that much?.

All I can think of is that the reading taken by the GP personnel during their inspection prior to auction was done when some of the trucks were warmed up and others were cold. Just curious...

 

[98G]

15psi hot at idle is spec. Although I usually see more like 30, and 60 or more cold.

 

[bchauvette]

I personally stay away from a 15 psi warm oil pressure look at it as a minimum acceptable number. It will only go down as mileage increases. Start feeling cofortable at 30 psi warm idle. An example correct oil pressure statement should read something like : 30 PSI 700 rpm 110F.