Need muffler for M939/M944A1.

[Mark3395]

Well, I got the M944 home from Rock Island and am now unlading, cleaning, and doing the odd repairs.

Muffer is rusted out despite the cap at the end of the pipe. Does anybody know a commercial part number for that muffler?

I drove the truck to my shop. Has less than 2k miles on it. Need to clean the lathe up, but it's virtually new. Air pressure holds at 120 on both gages, but the low air pressure warning and light won't go out. Don't know enough about this truck yet. Has 4 draincocks for air tanks, and one doesn't apparently vent air. Maybe that's the source of the warning.

Drive fine though, great brakes, speed, and smooth engine. Had it inspected and serviced at a truck shop beefore driving it the 30 miles to my shop. Worst part was replacing 5 flat tires.

But5 it's need pulling out all the stuff that cam with it. Biggest problem is that it came with all the canvas, but none of the poles to set it up.

Is anybody starting a parts interchange list for the 939 series yet?

Tx.

Mark

 

[BKubu]

Mark,
There is a low air sensor on the end of the air tanks right behind the passenger side toolbox/step (I believe there are two of them, one for the primary and one for the secondary air system). You will see a wire coming into the sensor. This is your problem.

The mufflers are getting scarce. I am sure the big dealers have them, but guys like Winslow don't. Check with Dave Newman at Eastern Surplus. A new muffler is not going to be cheap. Owning an M939 series truck is not like owning a deuce from a parts-cost perspective. Get ready to work out your wallet. That is one drawback from owning one of the trucks. I have learned that the hard way over the last decade.

Bruce

 

[skidunits4you]

On my fire depts 939 we replaced the muffler with one from a truck parts store I do not remember the part number but I measured the one on the truck and they matching it close you would have to look close to see its not OEM I did weld flanged on it so it clamped on with the original clamps. Good luck

 

[skidunits4you]

I will have to look around the 939 came with the bows but I dont know if they are still around I will check tommorrow

 

[BKubu]

I have seen civvy mufflers that worked, but none (that I have seen...small sample size) that fit behind the heat shield. If you want your truck stock, you are probably stuck trying to find the right muffler. If you just want a muffler, you definitely can find a civilian muffler because I had one on my old M932A2.

 

[halftrack]

Is anybody starting a parts interchange list for the 939 series yet?

Tx.

Mark

I have along with Chris. Its just filter numbers right now, but I will be adding belt numbers, pulley numbers, and air valves, which all can be bought at your local heavy duty truck parts store. The more and more I dig in finding parts, the more I realized they used off the shelf civy parts.

 

[Mark3395]

Thanks for the good word Bkubu. I'll check the leads out.

Skid, the poles I'm talking about are different than cargo bows. They're used to hold the 4 big canvas pieces that form a tent around the van, and are normally stored on the roof of the van. They're missing and I guess I'll have to copy some. Thanks for thinking of looking though.

I guess I'll try first to find the OEM muffler. I'll call Eastern.

If I learn of any part numbers I'll provide them to you halftrack. I believe I need belts immediately.

Thanks guys.

Mark

 

[atvcat33]

i got mufflers, pipes, extension pipe, and long and short stacks for 9 series

mufflers runs 260.00 w/o shipping, brand new

 

[Dieselsmoke]

My buddy Bob has brand new mufflers $50. PM me for his contact info.