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With the pump off and I'm researching rebuild options, what other things do I need to consider? -Bumping up the HP would be nice as this is my "parade" M923 that's about to be singled out with 16.00s. I'm assuming a bump will help with bigger tires but have no idea what's a good bump without...

That's a nice fix- thanks for sharing.

I looked at Wes's video on removing the PT pump and decided I could take a swing at pulling off it quickly. Within an hour (including watching Wes's video) it was boxed and in back of my truck as I head back home. Thanks, Wes. And yes, the front looks good- spins freely but the gear pump on...

I was afraid of that. Okay- I'll do the research on R&R of the fuel pump as I think it requires a special half moon wrench. It may be a bit before I can remove the pump as I'm out all next month but it doesn't look too bad as a project. Just need to figure out what to do with the pump once...

I pulled the dampener and intake fitting off and had Soldier B crank. Looks like the gear pump is not turning, right? https://youtube.com/shorts/ORWau1JK7aI

Are you referring to the banjo bolt on the outside of the pump closest to the front of the engine with a line running down the side of the engine and back to the tank? If so that is an overflow valve to keep the fuel pressure in the PT pump at a constant pressure. Like you said, the little...

You may want to see if you can "de convert" back to 24v while it's back at Memphis. I know it sucks paying double for nothing but it might be better in the end. Lastly, there a many, many 24v to 12v dc converters available on Amazon built for exactly what you're looking to do. Lots of folks...

If I can find those beadlocks, I'll look for a NSN or PN on them. But yeah, I just gave up on using beadlocks on those set of 16.00 tires on combat wheels. Thought it was more than 1/4" of issue for me but it's been a while. I want to say I even tried to remove the rubber strips to help but I...

Thanks, Will. I'll be sure to take care when working the filter cap. I didn't know the PT body was aluminum- I'll be careful snugging up anything that touches it. The inlet is an elbow so good info on removing the damper to be able to look at the gear pump. And yeah, Diesel Creek is a great...

Igor designed amazing aircraft...

I've had trouble using the steel/rubber beadlock with 16.00s. The steel/rubber beadlock came out of 395s and were too wide to use on the 16.00s by almost an inch (it's been a while since I tried it). The only thing I could think of was the 16.00 Goodyear bead was thicker than the Michelin 395...

Oh...and never pay for a military manual for anything unless you're hankering for a paper version. WAAAAYYYY too many folks and websites trying to help you/me/us out by keeping the military manuals free and available.

Don't forget there is a sticky with a spreadsheet that has most of the civilian equivalent part numbers you'll need. https://www.steelsoldiers.com/threads/5-ton-parts-quick-reference-spreadsheet.82404/ I haven't dug into my brakes but I'm willing to bet you can find pretty much all the brake...

Hi Will- Thanks for jumping in. I followed your advice in this thread, post #3 about divide and conquer the system. https://www.steelsoldiers.com/threads/cummins-pt-pump-diagnostics.196616/ When I pressurize the tank I have pretty good fuel flow out of the IP inlet supply line from the frame...

My M923 with NHC 250 has been sitting a while from a crank-no start issue and I've confirmed I have no fuel coming out of the fuel shut off valve when cranking. Here's what I've done so far: -Verified adequate fuel flow to pump by pressuring fuel tank with 10psi so I don't think it's a fuel...

I didn't even consider this was effectively a bobbed truck drivetrain but yes, that makes complete sense. These trucks have so many design quirks that don't pass the common sense test, I just had to verify there was no issue with running without a rear axle being powered. And yes, I was...

I gambled and purchased a non-working M929 and had it towed to the house. The tow company removed both the middle prop shaft (between transfer case and middle axle) and rear prop shaft (between the middle and rear axle) , hoisted the front end off the ground, and used tow truck air to release...

That makes sense as I think the C12 is about 40% larger displacement than the 8.3. The C12 is still not as big as the NHC250 in liters but I can see where 2 650cca batteries in series will struggle some on the crank. It's just a lot of displacement to compress on two small batts. And I'd say...

I know the military prefers over to have over 2,000 CCA available with their battery set up but I'm curious if there is any Cummins documentation on cranking amps needed for the M939 series. The reason is I'm looking at a getting a couple new Group 31 batteries and will need to determine if I...

I just found where I lifted the pic from my post #19- it's also from a post #19 in this thread: https://www.steelsoldiers.com/threads/m939a2-shifting-issues.213336/ Lots of good info that I used in building my troubleshooting Thanks @Elijah95