M939 A2 air system/leaks troubleshooting

[Jim832904]

My first 5 ton has arrived to be prepped for snow removal on the 3 mile driveway. Got the engine to run thanks to this forum for the fuel system priming advice. I have no air building on either dash gauge. Shop air application shows me a gladhand shut off valve stem missing/leaking and a large leak on a steer axle brake chamber. Need to be sure this chamber can be safely disassembled to change the pancake like a civilian truck system. It looks like service brakes only on that axle. Haven't had time to hunt down the TM's yet.

 

[porkysplace]

TM's for the 939 series trucks

 

[Jim832904]

Thanks. Still have leaks.

TM's for the 939 series trucks

Are there other TMs?
I blocked off the leaking brake chamber and gladhand and still have alot of air noise from the intake stack and alot of air from the exhaust port on the regulator/sender looking thing on the first(wet) air tank. That thing has a stem on the end that looks like it had a handle for adjustment at one time. Should it be exhausting air? What is its function? Guess I'm going to disconnect each brake chamber until I find all of the leaks. Is there a better way? I still have no air on either dash gauge.

 

[Suprman]

Take pics post them identify which parts you are talking about.

 

[porkysplace]

The -24 covers most everything , the -24P is the parts manual .
This may or may not help you wiyh your problem.Air Brake system troubleshooting
m931a2 compressor won't build air