Someone please help if you know about air compressors, warning, long. So I have a Campbell Hausfield compressor from around 96 for home use. Its a 60 gallon upright from a tractor supply.

Had problem with my compressor shutting off, so I replaced the valve at the bottom of the copper tube where it meets the top of tank and it worked for a long time. Those valves have special high temp disc to withstand the heat

The tube started to get hot so I replaced it (the valve) again thinking I got a bad one. Still had problems and replaced the pressure switch.
Inlet tubes do get hot. Being copper will conduct heat from head way down to the tank valve. But geez they should not be "cheery red".

Seemed to be okay for a few months till I worked it a long time and was under my car when I heard something fall, the plastic air cleaner melted off the head, and the tube was cherry red again. Motor made noises so I bought a new one from master tool repair, their updated universal motors do not have a dedicated unloader line like the original so they sell you a brass T connector, so the unloader line comes off off the head at in the same fitting that the main tube to fill the air.
I broke it in with the mobil 1 oil the suggested, it ran fine with no load (valve open at the bottom so no pressure) for over a half hour.

Problem is the first time I used it the unloader line (the one they give you is vinyl or plastic) melted at the head and blew off.


I thought maybe I did something wrong and bought a new line and just installed it, the tank only ran for maybe 10 minutes, I put my hand near the fitting at the head and could feel the heat coming off, and a few seconds later it blew off again. What am I overlooking to constantly get failure after failure?