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Maybe they have the dual PTO to drive a pump for the water at the middle or the back of the truck. My M51 (5-ton) has a dual and I am now fighting with it. I think only wreckers have rear winches.

I have been looking through TMs and threads quite a lot now, but I am missing something. According the operating instructions, with everything in neutral put, unlock the winch control lever and put the winch control lever in position Low or High, or even more speed levels in between. No...

Finally found a good linkage scheme for the M51. TM 9-2320-211-20-2-2 page 385 - 368 Just will put it here to make it easier ... That section has good description as well on page 392 and 394. Seeing the pic on page 392, it looks that my dump control lever is going as far as it should; I...

Safety latch is open; you can see it laying away from the lever, still wet from several treatments of WD40 Don't forget, the dump truck PTO lever works different from the standard cargo versions. THe dump truck has an up position for front winch and down position to engage the hoist hydraulic...

This is as far forward - down position I can get the dump bed control lever. The PTO attached to the transmission. Turned out that the winch really was completely frozen. I removed the front power shaft to the winch, but still could not get the winch side output (top red arrow) free and the...

Correct. But per CARNAC and Dave Dolyle, the accompanying paperwork not always does so. Neither CARNAC nor US Military historians could find more data on the truck as mentioned above, leaving the gaps unexplained. The hood number can still be seen vaguely on the hood when I bought the...

Did the army kept track of this? Presumably the hood number follows the truck throughout its life, but both CARNAC and Dave Doyle mention that keeping track left something to be desired.

How do you test it? The lever on the controller that links to the rear shifter shaft can be moved forward and backwards some space, but it does not feel like its shifting something, just free space. Then it "clacks" against a stop, at least that how it feels when moved by hand. The one linked...

What I mean with the more active, it might not have been in POMCUS all the time but active in another unit here in Europe. According the owner who bought it as surplus, it already had a shabby look, a serious twisted head rack on the dump bed and a messed up winch. When they bought it, it had...

I know they are not active when in POMCUS. The only thing is, the history of my truck is unclear. Almost certainly, it was made in 1965, based upon the sequence of serial numbers and hood numbers. However, the truck was overhauled in 1973, and its history can be traced only from 1973 to 1986 as...

Great and quick service, you really came through on this. That's what I was hoping for. Any way to get more info about that? Maybe the starting 99 is a year indication, in which case this might be the number designating this truck for surplus. I tried with the US historians both Frankfurt and...

After 10 years, I found that my truck has two more tags which I never noticed. They were in the driver side rear door post, so "hiding in plain view". Any comment on this is more then welcome, especially if you can help identify the tags. A barcode sticker. This I never saw before on a...

Actually, I hope I don't have a problem, but cannot get things back together. About 10 years ago I made this truck into an M51 - M52 switchable dump-tractor truck. To do so, I disconnected the drive shaft to the pump for the dump hydraulics and also the connections between the controls in the...

Just for people trying to find information, MyothersanM1 did a complete retrofit of an M809 series (M818 tractor) truck from air-assisted hydraulic to full air brakes. Perfectly described with lots of pics and description of parts. He did mention that his costs were around $ 6K, not counting...

Here you see the vent line running up to the MC from the Airpack. The line is disconnected, you see the connector hanging free on the right.

Oops, good that I did not try too hard. something is missing: On the left, you see that there is an additional connector between the MC still in white and the outgoing line. Problem is, I am sure that my collection of connectors remaining in the "truck box" does not include that one...

Thanks a lot for the link. Problem is that this does not count as document, so quick transport is crazy expensive, slow mail still $$ enough. Let's see how the hydraulic line holds up for now.

Thanks, I think we all have been there and know the feeling. Did I already mention that I want a few quiet minutes in a dark alley with the total @#$%@$!^ who made the layout for the lines? Had to take of the main line from the air tank to the air pack to get the air pack side connected. Then...

This is what I mean. The regulator section of the airpack, main air connector. The left wall was dented when removing the airpack. Two other connectors got destroyed because we could not get them free normally. By the time they were free, either the tread was dented or the bolt part rounded...

Mine definitely went to the air pack The air pack just after removing it from the truck. The image on right shows a close-up of the air regulator section. On top you see a connector that splits into a large pipe going to the front of the truck and a smaller connection sticking upwards. That...