Questions about a part from my air compressor

[Lonesome715]

Pictured below is a part that came off the top of my compressor. I have had it apart fro so long I do not remember how it goes back together. The compressor itself has been reassembled for quite a while. I held off on this part because it got mixed up with something else. I am not even sure what it does. Is it a check valve? I need to know how it goes back together so I can wrap this part up. I have looked at diagrams in the TM section but none of the diagrams I have found shows this specific part or how it goes back together. Does any one here know?

 

[AceHigh]

I think you can just take it to a truck parts store, it is a common regulator.

 

[AceHigh]

I think this is it, is it not?

Air Governor For Trucks With Compressed Air System, M35, M809, M939, etc. 284358 / 10900525-5 / 4P5388

 

[Heavysteven]

Is it the air regulator off the firewall? To be honest I don't know what that is.

 

[Lonesome715]

That link if gor the regulator that mounts on the fire wall. The part I am dealing with installs right on top of the head on the compressor.

 

[gringeltaube]

Unloader valve assy....
This is how it goes together (pic below); gasket not shown.

G.

 

[nk14zp]

Unloader valve assy....
This is how it goes together (pic below); gasket not shown.

G.

You beat me to it.

 

[Lonesome715]

So the rubber peices go in cup first? I sure do appreciat that photograph.

 

[Lonesome715]

Oh, I forogt to ask, do I apply grease inside? When i took it apart I could not tell if it had grease or junk gunk biuld up.

 

[steelandcanvas]

Thanks G for the photo, I copied and filed it for future reference. I'm sure that assembly breakdown is in the TM, but photos are better.

 

[Lonesome715]

I also did not realize it needed a gasket. My rebiuld kit for the compressor did not include one. I am glad you brought that up. I will see if I an make one from some gasket material i have.

 

[gringeltaube]

Use thin gasket paper, or some gasket maker like Loctite 518.
Not really critical here.

Yes for some light grease. I will assemble this with silicon grease, which I prefer anytime over mineral grease, in all the air system...

And YES, the cups go in first, with the lip facing inward.


G.

 

[Lonesome715]

Thanks you for the clarification. I am drawing close to getting this thing done. One small detail at a time.