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  1. Suprman

    m939a2 starting problem in cold weather

    Get a trickle charger and block heater. It should start every time. My A2 truck will start at single digits after a minute or so of cranking. It's not happy about it but it goes. The trucks with the older 250 motor need a bit of extra help at that low temp.
  2. Suprman

    Military now doing criminal back ground checks to get on posts.

    Even with the window sticker back in the mid 90's at 29 Palms I had to show ID at the gate. Pendleton they would usually just wave you thru though I would go in one of the small gates not the main.
  3. Suprman

    M923A2 8 rib generator pulley needed

    Stuff gets outsourced for cost benefit. Its hard to find people here that have a good work eithic and want to do a good job.
  4. Suprman

    Military now doing criminal back ground checks to get on posts.

    I thought they always did a ncic check when civilians go on base.
  5. Suprman

    M923A2 8 rib generator pulley needed

    Wow never heard of that happening before. First time for everything though.
  6. Suprman

    M923A2 8 rib generator pulley needed

    What happened to yours? It's not a high failure part.
  7. Suprman

    M923A2 8 rib generator pulley needed

    You are probably looking at the A1 section you need to find it under A2. Different motors different belts.
  8. Suprman

    M932a2 oil pressure

    The 8.3 has low oil pressure at idle. 1 psi per 100 rpms is fine.
  9. Suprman

    What does your M939 series truck weigh.

    I have never weighed mine but the data plate should be accurate. When the military is loading equipment especially aircraft, if equipment weighs more than stated it can cause serious issues.
  10. Suprman

    CTIS Quick release/dump valve needed

    The whole system is one air line in and it splits off via a quick release valve on each axle, which all 3 are daisy chained. When the system sends pressure to fill, if a tire has less pressure then its less resistance to incoming pressure and that tire will fill. If all tires had equal pressure...
  11. Suprman

    CTIS Quick release/dump valve needed

    I will look I have one somewhere. Yours probably isn't bad though. The wheel leak is causing the valve to see less pressure and it thinks it should dump. If you fixed the wheel leak the problem should go away.
  12. Suprman

    CTIS Quick release/dump valve needed

    The m939a2 dump valve looks the same it may work. I can tell you that they don't go bad often. A system air leak like a bad hub seal will mimick a bad valve.
  13. Suprman

    AIR DRYER INOP- No power- source?

    At 120 psi the ctis system will cut out to save air for truck use. You want to be around 135 and when driving the ctis will have all the air it needs. If your governor system is working but the air dryer is not expelling moisture after turning the governor up a bit, check the line going to the...
  14. Suprman

    AIR DRYER INOP- No power- source?

    There is a valve body in the cab for the ctis. Air comes into the ctis system thru this valve then out to the wheels. You will hear air sounds in the cab but no air should escape. If air is coming out of the valve body then it needs to be rebuilt. The air dryer is all mechanical. The air line...
  15. Suprman

    A Wild Geese Chase...parking brake M923

    It's a release of air from the brake system. The trucks will make a wide variety of honks and groans from the stack. It's normal. But somewhat annoying.
  16. Suprman

    Frying Alternators

    Maybe the stock 60a alternator just isnt enough to charge both banks. After you installed the second one and before it went bad, what did your voltage gage show?
  17. Suprman

    M923A2 clicking sound coming from fuel tank

    I always thought it was the pump pump pump of the lift pump going and the return fuel pulsing back to the tank. And if the tank level was low the return into the tank reverberates.
  18. Suprman

    reserve

    They are taking pointers from GP.
  19. Suprman

    6CTA m939a2 overheating issue

    Most auto shops have a test kit for combustion in the coolant. Chances are you have some type of head gasket or sleeve failure.
  20. Suprman

    6CTA m939a2 overheating issue

    When you flush it out you need to drain it and then take off the upper radiator hose and stick a water hose in there to really get all the rust and gunk out. I have heard stories off all kinds of yuck and gunk coming out.
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