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What's the best way to slowly turn an engine over by hand in a 6.5L n/a hummer? I know I can "find" a way to do it but I'm sure there is a best practice where I won't strip or break something in the process.

Just picked up a M1097R1 from GP. The auction description it stated no batteries so nothing was operationally tested. I knew it would be a bit of a gamble but from the pics it was clean enough for me to roll the dice but now it's sitting on the trailer with a crank-no start issue. I have a...

M929A2 dump truck. As subject says, I need a replacement lever to engage the PTO in the cab but I've not had luck in the usual sources. It's thingy #12 (and 10, 11 preferably) in the attached sheets from the -24P. Any non-obvious sources I should try?

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 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...

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 need a new fuel cap for my M923. The little pot metal fillers in the four holes corroded to the point where they started leaking and falling out. The only reason I can think why they exist is that they would melt during a fire and allow pressure to escape the fuel tank so it doesn't explode...

Here's the scenario: Pick your flavor of M939 series truck with a NHC250 is located 200 miles away. Seller says truck runs, tires are good, and license tags just ran out last month. The only issue is it's hard to start and dies at idle if you don't keep the rpms up (sounds like air leaks in...

I read a lot on SS that 5-ton wreckers (M936s for sure and maybe M816s) came with field repairable or reusable hydraulic fittings. But when I look on pics of M936s for sale, I don't see the kind of reusable fittings I'm used to seeing that have wrench flats where the crimp would be. I found a...

I'm going to inspect the crane hydraulics of a M936A1 that is reported to not work and I want to get knowledgeable on crane ops before I go see it . All I know is "PTO engaged but no hydraulic pressure to crane" so I'm guess this has a high probability of operator error. And yes, I have all...

I own three M939 series trucks with the NHC250 so I'm familiar with how air leaks in the fuel supply system can cause havoc. I'm hearing the 8.3L isn't too different in that air leaks (along with a bunch of other nit-noid things) cause a lot of no-start headaches that people originally...

I’m looking for bulk oil hose and searched all over here and the web but can’t find a part number or other descriptive way to explain to my local industrial hose shop what I need to replace my oil pump hoses. Not having luck with the local truck repair shops either. Was hoping to reuse the...

Looking for a set of troop seats and a full set of tarp and bows for my 923 with standard drop sides. At least trying to understand what a decent set will cost me. Surprisingly, I'm coming up fairly empty on even finding prices from the usual major online surplus sellers. One did have them in...

A few months ago, I purchased a really clean military dump bed that looks like it was taken off a M51 Dump (M35 series 5-tons) as it has the PTO driven hydraulic pump that's integrated into the dump frame. My goals was to put it on my M925 after I shorten the frame a bit but since the M925 has...

It seems like almost every surplus tire dealer removes the run flats from the tires they sell. I'm referring to the big rubber donuts that can't even be given away for free afterwards. My question is because I bought two XZL 16.00R20's already on HEMTT wheels from GP so I assume they have...

I picked up some unused Goodyear AT-3A's at my local govplanet. Tires are good shape and less than 3-4 years old on average but they were stored flat on a pallet so the tires are collapsed some. When I try to mount them on my combat rims, there is 2-3" inches of space between the bead and rim...

Between the M923 and other items in the motorpool, I probably need about 4-6 oil analysis samples done each year, if I'm lucky. Just need the usual data of high metals, fuel dilution, etc. to know if I got a failing system. Would love to see my data online and have it stored permanently for...

I couldn't find anything in the forum about how to inspect the cylinder liners and piston heads without removing the head. Can you drop on borescope through the injector port? I think you need to remove a cup underneath the injector to drop through, but even then I'm not sure what is the...

Truck starts and runs solid. But when I let off the throttle to turn a corner or such, the engine rpm drops below idle and sometimes dies on me. Not a fun time when turning so I generally keep the throttle pressed a bit. I looked through the forum but only found the this thread that says the...

Looking for a source of quality flange nuts for studs that LMTV wheels together. Need at least 60 but will take a hundred since 20 per wheel. Any recommendations?