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M923 Not Building Air Pressure

0352

New member
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Location
Tacoma, WA
The truck is a 1985 AM General M923A2. I just started it today but, it would not build air pressure. The air seems to be leaking out of an air purge attached to what I think is the air dryer (Pictures Attached). I can't find any air leaking from any other place on the truck. Any help would be greatly appreciated.
20140727_101741.jpgAnnotated.jpg

UPDATE:

I took apart and cleaned the lower assembly. The truck now seems to work properly. I will still replace/rebuild the unit for proper function, but now I can at least move the truck. Thanks to everyone for the quick response and links.
 
Last edited:

juanprado

Well-known member
Steel Soldiers Supporter
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Location
Metairie/La (N'awlins)
very common.

You can take a screwdriver or 3/8 socket extension in the middle of the hole and push the piston back maybe 1/2 inch. Squirt plunger area with silicone spray lube to help you keep it lubed.

dryer needs to be rebuilt. Complete top to bottom kit is 100-120. Several epay and ss members are selling new complete dryers for $140-$170ish.

I rebuilt mine since I had secured the parts before lots of them came out on GL. In retrospect, I would have bought new and been done with it. :)
 
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