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Nice CAD work there! Resin printers are great for this sort of work.

What printer are you using? I use a resin machine for small things, mostly miniatures.

I had no idea they did the generator thing with several vehicles. That's really neat! Gosh this all makes me want to cobble together the nice bits of some beat up trucks into wacky stuff like this. A deuce with a M939 cab for example. That deuce looked like an oddly-short M923 - the height...

Also check the axle vent, and clean or replace as needed. You should probably check all the vents. The same part is used on the military jeeps too.

I've seen one like you described for sale on Facebook awhile ago. That one also had a built-in 3-phase generator. At the time the seller had it in pieces and gave up on the restoration. It was an odd-looking truck!

Thanks for bringing the 5TTR up! I saw the pic in the OP posted here awhile ago. It was a book scan, so your pic is much cleaner (y) I find it interesting that they'd rebuild M939 trucks instead of M809 trucks - maybe they wanted an existing air brake setup? It makes me want to find a...

Your truck sounds great! It makes me want to get a multifuel for the sound :driver:

Straddle brake drum and use both hands to slide it off and lift it - one hand on the hub, one gripping the edge of the brake drum. Set it on a couple wood boards in front of the spindle so you keep it out of the dirt while you go get something to safely move the hub-drum assembly.

Can't you downshift with the gear selector to do the same thing? I do that with my M35A3, shifting down to 3rd gear to engine brake. The operator's manual for my truck says this is okay to do. I have an Allison AT1545P locking 4-speed in my truck. I'd like to have an M809 and a M939, though...

I'm curious about the dual-circuit brake system. For the M35 trucks, a kit was made available to convert trucks from single-circuit to dual-circuit. Other trucks, like some M35A2 trucks built in the late 1980s and the M35A3 built in the 1990s came with dual-circuit brakes from the factory...

Welcome to the site, and thanks for sharing your truck's story with us! That's pretty neat that the army did an engine swap. Did the truck keep the vacuum equipment too? I'm guessing the diesel motor came with a vacuum pump.

That's wild! Are the studs under that carbon buildup still usable?

Nice work! Your 3D model is quite detailed (y)

Thanks! Your info was very helpful in making this happen :) The only holes I engineered to print are small pilot holes for attaching the box cover to the base. Everything else I left solid for drilling holes of the desired size and location for any hardware. The print was made with zero...

I think A61 is supposed to be an air pack (air-assisted brake booster). A22 looks like some kind of bracket.

Good to know! My truck came with red stuff in it, but I have no idea if that was a military thing or a previous private owner thing 🤷‍♂️

It should be red coolant. I've been told diesels like the red stuff more. :unsure: I put red stuff in my truck anyway.

I think there should be a pressure safety valve at the air tanks. If you wanted you could add a second one just off the compressor. That was a M35A3 MWO that I applied since my truck never got it in-service.

You know, if you really wanted the turbo to whistle, a little bit of fabrication would get you a jet engine with a centrifugal compressor :cool: A turbojet that size can make a lot of things whistle!

Thanks for weighing them! I did the bearings on my truck a couple years ago and screwed up my lower back for a day due to following poor lifting form getting a hub-drum assembly off the axle on my first-ever try. I figured the assembly had to weigh somewhere around 70-80 lbs. I wasn't too far...