Excessively hot air on air compressor discharge???

The compressed air from the compressor will normally be hot enough to burn your hand. That is why the lines are copper or steel braided. Plastic will never work. You are lucky plastic lasted this long. Do not use plastic and switch to copper. The copper is also a great heat dissipater for that hot air. If the air is too hot going into the air dryer you will ruin it. Air dryer normal purge time is about 20-30 seconds in duration. But if it is purging every 30 seconds you have a massive leak in either the wet tank or signal lines betweens the wet tank to the governor, and from the governor to the compressor, governor to the air dryer. Make sure your wet tank isn't leaking big time, this will cause your excessive purging, which causes the compressor to work all the time, this explains your melted plastic discharge line, a big leak also explains your slow build up time. If you find no leak for your slow build up, remove the discharge line at the compressor and run the engine. The discharge air will not be hot yet, feel the air flow with your hand. Remove the fresh air intake pipe from the compressor, (or filter if it has one of the little donut filters), and see if the flow has increased or not. If the same, reinstall intake and discharge and remove the inlet to the air dryer, test again. The flow here will be somewhat the same as at the compressor. If it is a lot lower, something is wrong with the line. If not, continue down the line, remove the air dryer outlet and check again.

 

You need a compressor discharge line. They are stainless steel braid with a teflon liner. Get the longest one that you can possibly make work. That way the air is cooler when it gets to the dryer or tank. Air that is too hot is bad for the air dryer.

 

I second that plus I would clean out the dryer, replace the cartridge and because you replaced the governor, see if you have the lines mixed up, that will cause you to have the problem with the unloading of the air compressor take 10 to 30 seconds. The governors are not direct replacements all the time. I had one heck of a time with one of the trucks doing this after I replaced it, once I moved the line from the dryer off one port to another, it worked.

 

That air outline from the compressor needs top be steel or copper. It is against DOD regulations if memory serves me correctly. I am glad you got it corrected. The lines being swapped cause the unloader to work incorrectly.

 

Replaced my airdryer seems to run hotter then normal any help would realy be appreciated