Recent content by Doubled

Cut the bell end off a valve stem. Take a short piece of 1/4" rubber hose and clamp the valve stem in one end of the hose. Remove one of the vent tubes and clamp the hose to the fuel tank. Crimp the vent line you took off with a pair of vise grips. Put about 10lbs of air in the tank via the...

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Thanks for that information. I have a couple trucks with that engine. I haven't had it happen yet but I will know what to look for when it does. One thing I like about those engines is how easy they start. it barely cranks over and fires up :-D

Engine Size Yes that's the 6CTA8.3 Cummins used between 1999 and 2002 in the M939's.

Thanks for the link. There was some info I was needing there!

Looking at that right front tire I would say yes on the CTIS Looks like the engines is the 6CTA8.3 Cummins is there pic of the the Left hand side of the motor?

I lika dat!! I lika dat alot :D

Just wanted to report back. I rigged up a way to pressurize the fuel tank with 10PSI and found two leaks. There was a tiny pin hole in the plastic line to the primer pump and the bolt in the top of the fuel filter was leaking. It had an O ring but the washer was turned and wasn't dropping down...

Parts? I'm considering parting out a M931A1 that I picked up that has a bad motor. Email me if there's any major components you need. david@doubledstrucks.com

If they don't hold air If your tires won't hold air and you need to replace the O-Rings in the wheels I can refer you to a couple suppliers.

That's what I was thinking. I got the order from the other post. Thanks for your input!!

I searched the forum and found a post that had the steps on it. I copied the steps and added some comments from the thread. I just was hoping someone who was experienced at them would chime in.

Are the following steps a correct procedure for replacing an "O" Ring on a M939 series 5 ton wheel? If so are steps 6 and 7 in the right order? Pics would be nice if you have them Thanks!! Double D 1. Deflate Tire 2. Remove the bolts holding the two halves of the rim together 3. Remove...

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Good Catch there!!! LOL