When I try to use one of the 2 valves it locks up and won't function.
When I shut off the engine I can work the valve and it will move freely again.
Any thought on what might be causing this?
I notice there is a switch valve shown on the diagram in my manual but no explanation of what it does...
My MF 255 with Perkins diesel engine is showing about 10 PSI idling and 35-40 PSI at 1500RPM.
Engine runs good, doesn't use any oil.
Does anyone know what oil pressure should be?
Is there a pressure relief valve in the oil pump?
Thanks