Freightliner Classic won't build air

Hey I have a 2005 Freightliner w/ Detroit engine, I'm trying to find the cause of a air leak and to see why the air compressor is running HOT - it also burns up that small air pressure hose .within 5 day of replacing it. I have replaced my air compressor 3 times in 3 weeks, the governors, the dryers,
Please HELP me find out What could be causing the air compressor to run hot

 

Maybe it's too late to answer your question but this might help others , there is a hot plug valve inside the compressor, it is replaceable , when it's worn or the gasket becomes weak, you would notice extra heat coming . I would replace the piston too since its easer to do once every parts is taken out.

 

I also have a problem the truck is not building air and there is oil on the air tanks

 

Witch way dose the air lines run and witch way dose the valve turn 12 DEL and 22 SUP is 22 across or up and down

 

Witch way dose the valve turn on fire wall of 1998 freight liner classic. 12 Del upand down 22 side to side or vice verca