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I've had the fan and fan clutch replaced. The truck runs fine, and only gets hot enough to engage the fan after a few minutes of highway driving. When it does engage, there is still a roaring sound more than I would expect. I've got several M939 trucks and also driven CDL trucks, none of...

I brought back a M1078 LMTV from Ft Bragg, NC last month. As the engine gets to 210 degrees, the air valve engages, the fan comes on, horrible vibration sound for 30 seconds, and then the fan cuts off. Drove about 4 hours with this pattern. On I-40 the fan blade finally broke off, fractured...

My "new" M936 transfer PTO has never worked since I brought it home from GL. Now it's in the shop and we found the PTO pump gears are stripped, so all the internal gears were dry and the bearings shot. I'm having a hard time finding a replacement PTO. So, here's the question: is there a off...

I won a M923A2 from Eastover, SC and plan on picking it up tomorrow. I see this thread is 4 years old. Anyone know of a reason I can't drive it off the base? It's listed as "starts and operates". I've had good success picking them up from 3 other sites in the past 2 years.

Yup, transfer in neutral. then I've tried both ways: PTO lever back, then 1-5 gear transmission, or vice versa. Same result, grinding of gears, like a clutch can't engage. Never do get any power or hint of flow from hydro pump, even as the PTO to hydro shaft turns. I'll get some joy...

Here's an update to my recent transfer case PTO question. On my recently acquired 1984 M936, I still am working on getting the PTO to power the hydraulic pump: this truck had a MWO modification which added an automatic engine accelerator, which revs up when I engage the PTO lever. This is not...

Thanks so much, It will be awhile before I have time take off the PTO, but I will report back what I find.

I Have an M936 with a transfer case PTO that won't engage. I've tried the other tricks mentioned on SS, such as bleeding air down to below 30 PSI, or wiggling the transfer case lever to find a sweet spot. I've lubed the linkages, and when I follow the manual directions for engagement, the auto...