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There are no studs on an A2 PTO. Just bolts and yes one is hidden inside and requires a long allen head socket wrench. Since long allen head sockets are somewhat of a specialty I made my own from a typical standard length short allen head socket by just removing the allen head shaft and getting...

And there is no manual lock in for fan clutches on M939A2s like the earlier versions with 250 NHC. My experience the fan rarely comes on much in normal driving conditions. The cooling system is giant for the displacement of the 8.3L

Im open to that thanks, maybe someone will pm me. But it would be nice to see what it looks like.

Its funny but at the auction there happened to be 40+ M1070s all at the same location and date. By far the largest amount I had seen at one time, but only 3 or 4 had this writing on them and although it surely wasnt the only thing I was basing my bids on but I did want one with the crazy...

My M1070 does not seem to have a battery disconnect and I was wondering if someone would be nice enough to take a couple pictures of yours so I could copy it. The manual doesnt show what it looks like and even if it did it would most likely just be a drawing anyways. I wanted it to somewhat...

I finally got my M1070 today. I have been crawling around,under and in it this afternoon seeing how everything is set up but there is one thing I will never figure out! I suppose it must be something fairly common like maybe a warning or USA? I dont know what each character represents so I cant...

Skip the first reply! It can take some time to fill up all 6 tires at once, depending on the CTIS starting pressure and at what rpm and duration the engine has run at. You can get some idea by watching the stock gauges to see how fast your trucks air pressure is recovering while in fill up...

It can take some time to fill up all 6 tires at once, depending on starting pressure and at what rpm and the duration the engine has run. It also depends CTIS system will open up the truck's air supply to the tires after it hits around 120 then it will continue filling unless or until the...

Thanks for TM's on the torque specs. Its not quite as different as I thought or had figured.

Thanks for the editing guys!

I was comparing the drivetrains of the M1070 versions available to us and the newer Cat powered version the military is upgrading to and was surprised. I know I will never be able to get a hold of a C18 to re power with and it would be too long at the current spot. (A C18 would cost twice or...

Thanks, she is still working like a charm. In the future I think I will install a 24vdc electric solenoid valve inline to the front tires so I can cut them out of the system when needed. That way I can leave the front tires at my desired pressure and just adjust the rear. And since this truck is...

Got it working Well I got my CTIS system working now for the first time, And I thought I would describe how I was able to track down the problem(s) just in case anyone else is having similar issues. First I put a gauge inline at where the black nylon output line comes out of, the cab mounted...

I have a m931A2 I am working on and I am not sure if the fan actuator is working correctly or not. The trucker who picked it up mentioned to me on the phone to take a look at the fan clutch but didn't expand on it. I have not been able to run the truck on the road yet do to other problems, but I...

Thanks, I do unplug and plug it in every time I mess with it or try to get it to work. Actually that was the first thing I did when I picked them up from GLS yard as all the trucks had flat tires at various stages of air pressure. I didn't think about the governor though, So maybe the system...

I now have 3 939A2s and none as of yet have a working CTIS system, and none have ever worked since I have owned them. All 3 now have the 5 flashing light deal. After the first two trucks didnt work I was just going to give up on them since they are wreckers and I dont need different pressure...

Look how much longer the front end is

heres a bigger picture

With most of the M1070s I have seen for sale being so low mile and relatively new I was wondering why the Army didnt just update them like the new model, with the Cat C18, newer 7 spd Allison and new model 1 spd transfer case, instead of replacing them with a completely new unit. But then I was...

I see what you mean. My idea(s) stem from the fact that all my experience with rear steer is from the heavy equipment or Agriculture realm, and that means hydraulic. I knew that this limitation in knowledge would have to be addressed prior to advancing from the the theoretical.