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TM9-2320-272-24-2 shows in section 3-221 (page 3-631) that you're supposed to discard the O-ring each time you dismount the tire from the wheel. It's cheap insurance against leaks.

That makes my back hurt just watching it.

It's in the TM's. (kidding!) This is all I found: http://www.marcorsyscom.usmc.mil/sites/pdmeps/DOCUMENTS/TrainingTools/1E%20-%20BMMP-Updated-Oct%202008.pdf

I fit a 5lb ABC from home depot without issue. Don't over think it.

Thanks for posting that. It sure did look effortless in the M923. I think I widened it a bit as I went up, meaning that my tires didn't fall into those holes and have to climb 3' of nearly vertical sand/dirt.

Washington Metropolitan Area Transit (#90) Maybe?

It was fun meeting the some new people! We had three Pinzgauers (Yannick, Chris (no handle?) and ???) and a genuine military HMMWV (Nelson?) show up. I didn't get many pictures as I was in the seat a lot of the time. If anyone has pics, post them up! The stuckiest part of the day was when I...

I don't know the part #, but it's the same one used for the M809/M813 trucks. they run about $2 to $4 on ebay. Gear oil should be 80/90wt (75/90 is also fine) Those hubs and drums sure are heavy, aren't they! :)

is there any benefit to running negative pressure in the axles? (specifically with regard to leaks)

Good point. Poor choice of words on my part. The axle will not cool instantly, but it will cool when being run under water.

Heat increases air pressure. If your axle is at zero psi, in a closed system, the pressure will increase above zero as things heat up (positive pressure in the axle). The vents that I pulled off would only let that get to about 1psi before they vented. If the axle inside heated to more than...

I removed the vents from mine, as well. Each gave a healthy breath as I removed them. When I blow threw the vents, it takes about 1 or 2 psi to make them open. Trying to suck on them (tasty!) Does nothing. No air comes in. I haven't put them on a vacuum pump to see if air can...

Check on the TOP of the frame behind the steering box. That's where mine were.

Great write up! Was your inner bearing grease packed and your outer oil bathed? Do you know if the separating (black plastic) sleeve will allow oil to bath the inner bearing?

Looks nice. I thought they were goodyear duratrac. I haven't bought tires for a while, I guess!

Hey Yannick, What tires are you running on that Pinz? They look taller than I've seen (and better proportioned!)

Who let the dogs out? See you sunday.

Power Take Off Dave. He had an old red and white Ford pickup with a giant PTO winch on it. He's unstuck a lot of people with that setup. I think your winch is bigger, though.

I had a leak at one of the rears. It wasn't the seal particularly, but the plastic collar (called a sleeve) that separates them. It grendaded. My best guess would be that my spindle nut wasn't tight enough causing a bit of a wobble. The smaller (outer) nut came off with a large pair of...

Interesting. What year is the truck? I'd guess it's a 250 (855ci). The 8.3 (6cta8.3) is only in the a2 models starting about 1989 or so.