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  1. Plane Fast

    Bigboy down again,M923 won't build air past 59psi

    It sounds like the leak he has is in the intake. The unloader would not cause that type of leak as described. If the unloader is faulty or stuck. It will cause the air dryer to over pressurize and/or have longer then normal blow off. The other would be slow or no air pressure building. If the...
  2. Plane Fast

    Bigboy down again,M923 won't build air past 59psi

    Does the trans vent go to a junction or straight to the intake? If it's a junction, you are just pressurizing the trans with the leaking air. I have to be off the computer for a bit. I will say if the truck was running fine before it was parked. It is just a stuck valve. The trucks don't...
  3. Plane Fast

    Bigboy down again,M923 won't build air past 59psi

    You may just have held enough with you thumb to fine the weak seal in the pan. The trans does move some air.
  4. Plane Fast

    Bigboy down again,M923 won't build air past 59psi

    I'll have to think about that one. Although the air loss you are having is not from the trans
  5. Plane Fast

    Bigboy down again,M923 won't build air past 59psi

    Im sure it could. ( I do have two nos treadle valves if needed ) I would try to work the valve a bit first. If your truck has been sitting, it may just be stuck. I've never done this, but some guys run a few drops of air tool oil in the air system. This may free up what is sticking. Look at some...
  6. Plane Fast

    Bigboy down again,M923 won't build air past 59psi

    Unloader will not cause air to leak into your intake. The treadle valve and I believe the transfer case vent into the intake. When you push down on the brake pedal, and release. The "goose sound" is coming from your intake. The treadle valve maybe stuck open.
  7. Plane Fast

    Great... Now I want a MUTT!

    I need to go on a rescue mission! Poor MUTT!:shrugs: http://youtu.be/OZ24n2XOhUY
  8. Plane Fast

    What have you done to your 5 ton this week?

    Added my IR lights today.
  9. Plane Fast

    Bobbed m923a2 and axles

    I think one of your biggest hurtles will be a transmission that can handle 3000HP.
  10. Plane Fast

    Bobbed m923a2 and axles

    M939 series trucks are also know as 5 tons.
  11. Plane Fast

    Bobbed m923a2 and axles

    Man, I'm not sure. They are some type of Ag tire. The truck your trying to build will not have much of a 5 ton left. 3000hp and the frame will look like a cork screw! Good luck on your build and take lots of photos. I would look into just building from scratch.
  12. Plane Fast

    Bobbed m923a2 and axles

    Something like this? And no it's not mine.
  13. Plane Fast

    What is it Worth?

    Yep!aua
  14. Plane Fast

    What is it Worth?

    The frame is not right as well. The frame over the front axle should bow up, not straight. I guess aftermarket? Maybe an OMIX body too.
  15. Plane Fast

    Piston Rings Worn Out, Time for a Rebuild

    Yeah....Your probably right. Lately the price of parts are close to the price of gold!
  16. Plane Fast

    Piston Rings Worn Out, Time for a Rebuild

    Man, I hate to hear your still having issues. If the truck is in good shape. I would see if you can get your hands on some of the new canned motors that sold in CA a few months back. I think they sold for just under $900.
  17. Plane Fast

    Cucv purchase sight unseen, payment recommendations?

    Yikes! I guess there is always one bad apple.
  18. Plane Fast

    Sort of new from Northeast Ohio

    Welcome from PC. My second home appears to be Groveport!:roll:
  19. Plane Fast

    M931A2 won't air up over 80 psi

    Yep.. Bring the bolts up and tilt them to the rear and up. I had to remove the fuel line bracket as well. (One bolt)
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