Why does my campbell hausfeld 80 gallon 2 phase air compressor start to bog down at 90 psi

SOURCE: air compressor not working

If your motor is running and not the pump, the malfunction is either in the pump or the coupling between the motor and the pump.

Some of these compressors are manufactured so cheap now that there can be just a set screw that is loose and the motor shaft is spinning free inside of the crankshaft.

If you drain the oil out of the pump and take off the pump crankcase cover, you should be able to see the problem.

SOURCE: air compressor can't start (hums) under pressure

maybe high pressure vavle is bad

SOURCE: Air compressor motor stalls under pressure

this sounds like a bad pressure switch.if the unit is not shutting off at the same pressure each time this would be the cause.2 if the pressure is not unloading the air pressure on the compressor side of the unit it will cause the unit to struggle when it starts a cycle because the piston is under a load .how this works is say the unit starts from 0 psi when it get to the desired pressure you have it set on the unit kicks off . the other adjustment most units have on them is what pressure to cycle back on.so when the unit reaches say 100 pounds ,it kicks off and bleeds the air off the compressor side so when it starts back up it wont start up with pressure on the piston.

SOURCE: Campbell Hausfeld Air Compressor won't start

The compressor starting problem is common to most of the small portable compressors. Poor design and undersized components are to blame. If you have one of these units i suggest looking into a product called the Smart Start by Conrader Valves. It is interchangeable with the standard air filters and allows the compressor to start without fail. check it out- www.conrader.com.

SOURCE: Campbell Hausfeld extreme duty 4 gallon air

check for a crimped or damaged line going to the presure switch or it might b the presure switch itself