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That is were the VIN is on my M936 1984.

I knew he had them, I just looked at them a day or so ago. Albert

I found some on Erik's site. http://www.eriksmilitarysurplus.com/fucapreseq28.html

Welcome from AZ.

I think it is a good idea to be able to disengage the front axle when in low range. I do not use low range much in the M939's, but I do not put it in reverse when I do.

The supplies all sell them. GIJoeCzar here on S/S has them also.

I got a new seal and that stopped the leaking.

I used a rust remover on one I had, made it almost like new on the inside, well almost.

Glad I could help!!!

It was round when new. That looks like a rim with the 10 3/4" bolts. The other older 5 ton wheels do not have a grove for the o-ring and they are a bear to get to seal. The one you are showing is the better wheel for working on for sure. Here is the p/n 12363606 Erick's has them. Sometime...

What I have found on the O-rings is. The 5/8" 10 bolt older wheels take a 8mm o-ring and the newer 3/4" 10 bolt wheels take the 5mm o-ring that when you pull it off it looks triangular. The newer 3/4" wheel that uses the 5mm o-ring is the same o-ring used on the M35A3 wheels.

Yes the larger one has the spring brakes and a service side. The smaller one just has the service side. If you load the P2P Softwhare here on SS it will help you understand how the system works. http://www.steelsoldiers.com/showthread.php?79228-TM-s-for-the-939-series-trucks The M939 MV truck...

Here is a pic of a truck I am working on. The wires run down and back, then up to the start relay. The grd goes right to the frame under the Alt.

On each of the rear axles there are service brakes and spring brakes. The bigger ones are the spring brakes, used for the parking brakes.

The right nuts or the ones that are used for the front wheels. The thimbles are what holds the first wheel on when you are running dual wheels.

You can down load the P2P software here on SS and it will help you trouble shoot the problem. I used it a lot when I had a brake problem.

Kurt you are right fire "BAD"..

Yes you can not start it with out the key. But you can short the switch out and get it started. But that would take a little time and you would have to know about it.

It maybe the treadle valve or one of the check valve.

I would think it maybe a line that is leaking. I would turn the truck off and push on the brakes and see if you can hear a leak, also get a soldier B to help out. FYI, if your truck has a ball valve on the front service glad hand, Do not close it, it will cause brake problems. I know first hand.