M939A2 Shifting issues

[Elijah95]

Got all the parts a month ago, just installed them all this past Tuesday. I installed the dual Filter Housing upgrade to replace the original filter canister with 2x 2 micron filters, replaced the lines from the pickup tube to the filter housing into the manual pump, the pickup tube (which was steel and covered with rust and pitted), replaced the manual pump (the inside screen was covered in old, deteriorated rubber) and the fuel overflow valve and now everything is back up and running. Runs better than it did before hand with more pressurized and cleaner fuel.

Thank you all who helped me diagnose this issue and to help me get it back up and running. Leaning more and more about this beast every day.

Out-#%€£ing-standing, glad to hear and it’ll be running like a raped ape for many more years now. If you want a little more go-juice, consider turning the main fuel up and low-boost fueling up a smidge too


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[TechnoWeenie]

What did you use for the pickup tube? Where did you get it from?

 

[Dumpy198]

What did you use for the pickup tube? Where did you get it from?

BIG MIKE'S MOTOR POOL — FUEL TANK PICK UP TUBE FOR M939 - 12302605 (bigmikesmotorpool.com)

 

[Dumpy198]

Out-#%€£ing-standing, glad to hear and it’ll be running like a raped ape for many more years now. If you want a little more go-juice, consider turning the main fuel up and low-boost fueling up a smidge too


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Oh I definitely plan on that, it's an 8mm and a 10mm set if I remember?

 

[Wreckclues]

replaced the pickup tube (which was steel and covered with rust and pitted),

What year is your rig? I had the same problem with my 1976 M813.

 

[Dumpy198]

What year is your rig? I had the same problem with my 1976 M813.

1991 M925A2