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98G in Tucson has some 8.3 blocks. http://www.steelsoldiers.com/showthread.php?132009-NOS-Cummins-Engine-Blocks&highlight=

:ditto: If you have not serviced the bearings it is time to check them out. If you just got the truck you do not know the history of the service, I have been down that road before and it will not end well.

It should still have the factory fresh smell.[thumbzup]

Yes I have, It does not lose air and cuts in and out with in limits. Low buzzer comes in as it should. Will get a new reg. and try that next.

Thanks, some good ideas to try.

OK, I have put a complete new air dryer on the truck and I still have the same problem. It just looks like the air compressor is coming on to soon.

Is the expello valve in the compressor head?

Grimpyrobb, I do not know how to change the turn on PSI only the turn off psi on the reg. Suprman, I saw the little line that runs back to the reg. (governor).

Yes that is the first thing I did.

What is the pressure that the air compressor should turn back on? The problem I am having is that the Air Dryer is popping off a lot. The truck builds pressure ok and the Air Dryer popes off the at round 120psi and it looks like the compressor comes back on at about 110psi and builds back to...

Sounds like you need to adjust your Governor down a little, it is on the firewall on the motor side. The St-3 check valve is at the back end end of the wet tank, the PPV is on the front end of the wet tank.

It that the one at the end of the wet tank? Mine is not steady, it pops off every 30 sec. or so. But I will make sure it is not the ST-3 popping off.

When I got my M929 it was very dirty inside. The floor mat was loose so I took that out and used the power washer on it. It turned out nice and clean. But like jeepskiner said, just do not stay on the gauges or under the dash very long. It was summer time here in AZ and it dried fast. LOL

M813rc, Thanks for the pics that will help!! MWMULES, that is an idea also, Thanks!! I was thinking of using the truck cover pattern.

JC, I could make up a set for you, if your not in a rush. LOL

Does anyone have a TM or TB that show the S-280 3 color camo layout? I have looked and looked. I found some for the trucks and trailers but not one for the S-280 shelter.

I have a problem with one of my trucks that the dryer popping off every 30 sec. I was thinking it maybe the regular on the fire.

If you have a M939 or M939A1 it may have the vent tube running up the motor intake, that is a good place to pressurize the the tank from. 3-5 psi. On the M939A2's I am not sure where a good place is.

If you do not want to take the hub& axle apart I would use USGI rubber, I have not had very good luck with the China rubber ones. If you do take the hub & axle apart I would use Silicone.

Thanks!