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Rebuild thread: http://www.steelsoldiers.com/showthread.php?138637-5-Ton-Power-Steering-Assist-Cylinder-rebuild

I'm working on a rebuild thread with pictures, part numbers, and TM references. I'll get it up as soon as I can.

9 threads seem to be the most common. Logically it should be fairly consistent.

The wording in the TM is very vague. What's supposed to happen with the travel adjustment is basically assuring that you've got even fluid on each side of the cylinder when the wheels are straight. That way you have full travel on the cylinder (so you don't lose any turning ability on one side...

So I have everything back in place and adjusted close to where it was. Looking at it, the purpose of the travel adjustment should be solely to prevent the piston from contacting the gland or the cylinder back wall when the wheels are turned. Straightening the wheels and measuring 25.5" from stud...

I have all the new seals installed. I'm finishing cleaning out the cylinder itself. I need to flush out rust-dust and metal shavings. Let me know if you need help. You'll also probably need 2 new felt pads and 2 new dust shields.

I got it on eBay. Just search for "M939 power steering repair kit"

Measuring stud to stud would be more exact. If the specs say 25.5" then I'll go with that. I guess the real question is how do I make sure the cylinder fills evenly? At dead ahead, the piston should be close to 50/50 in/out, with the adjustment end to get the final way there. Once hooked back up...

Well, my thought is how do you know what dead ahead is? I would think that 25.5" from stud to stud would be that. Plus there's no good was to measure that when the cylinder is on. I don't know too much about hydraulic systems, but I'm guessing as the cylinder fills back up, dead ahead would make...

No one's rebuilt or replaced their PSAC? Kinda glad I'm taking pictures as I go then. Might be useful info.

My power steering assist cylinder (PSAC) was leaking so I'm tearing it down and replacing the seals. I'm waiting on new felt pads and dust shields, so I've been reading up on reinstallation. The only part I'm a little confused about is the travel adjustment. The TM states that when properly...