Hello, I'm having trouble with the air conditioning on my 416 L9P07254 backhoe. The system cools very well at 900 RPM, but when the engine speed is increased above 900 RPM, it stops cooling. When I stop the engine and restart it, it cools again. The system pressures are fine, and I haven't found the fault.
Could be the expansion valve.
Hi friend, good information. Could you tell me if there's any way to test that valve? Someone else told me it could be the compressor pressure switch... (I already bought the pressure switch to test it.)
Define system pressures are fine, What are they???
Not near enough information to diagnose much. AC belt tension? High/low pressures at idle and full throttle? Has any work been done on the ac system? Condenser been checked for air flow? Ac clutch engagement steady or random and at what rate? Freon level?