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jjb your own list shows military spec fluids are accepted in military trucks, also these trucks didn't start life with 15w40 which was chosen to make logistics easier they started life with 10wt which at the time was chosen because of the hard use they were expecting the trucks to endure. If you...

10wt is what it came with from the factory and the military changed to using 15w40 for easier logistics, bet you good money none were drained and refilled just to change from one to the other.

No only the auto engagement of the front drive, I want to be able to roll in low rear drive only or 6x6 when I flip the switch.

Nice, but I bet that cab is going to weigh 4k

Don't sweat the heat it wasn't a problem on the 809 series

I personally disable that and the auto engagement for the front drive

Tim check and see how much it would be to just rent a fairgrounds and tell them what you are wanting to do, you never know might be free or at least cheap.

Yeah you should be able to just remove the air line from the actuator and cap it and the spring should push it back so you can shift the transfer case, if not unscrew the actuator and use the magnet to remove the detent pin.

No, on all 939A2's they were built with an inline small silver fuel filter like you would find on a jeep. They were such a failure that the guy's would take boxes of them with them and the military issued a replacement kit with an old style big canister filter and hoses. The filter on the engine...

Okay colt at this point we need to check out a few things. Do you have the shifter down, parallel to the floor, in high range? Check the switch on the shifter with a multimeter then at the solenoid. If you have power and the air is dumping when you push the button, then remove the actuator, it...

Okay time to break it down step by step get a small container, quart or bigger run a short line to the IP and see how long it runs the IP should be able to pull the fuel a foot or so no problem, if it doesn't you have an IP problem, if that works move back to the filter, then the pump then the...

Smokinyoda leave the interlock disabled and the auto engagement switch is probably disabled also,the only air you need is coming straight from the dash switch so find it and hook it up then check engagement. You may need to rotate the rear shaft as well as the front to get the clutch to engage...

Guy's come on these trucks are 30-40 years old replace all the rubber fuel line, and if you have that tiny inline filter replace it with a big military or civilian spin on type you will be happy you did.

Arise dead thread! Does anybody know what FS code yellow was used for the Marine trucks? Like on the shackles and such. I would like facts not guessing please.

Oops how many days did that set you back?

Yeah bud I have several cabs, Hattiesburg, MS 500

That was a picture I put on here. Call me and I can help you out.

Sounds like you need to PM your whole air system, I would start at the drain on that tank and disconnect it from the tank and clean it out and then do all the rest of the drains, then start on the feed lines and check valves, you are going to find lots of rust and crap.

Yes and not enough juice is the problem

98G is correct but you have to understand when he says no air that means shut the truck off then open the gladhand on the driver front and let it bleed off all the air and you might even need to pump the brake petal to get all of it out.