Ok, so I’ve been told not to fuss with the dash air conditioner. We have a 30’ breakaway with the 5.9 Cummins. PO had it unhooked by removing the belt. A forum search tells me a lot of folks do this. But my question is, why?
What makes this system unusable?
Thanks y’all in advance! this site is an unbelievable resource!

Expensive maintenance, never ending fix. Long lines from rear to front prone to leaks. We just run the generator and the roof A/C, that keeps the whole coach cool, better than just cold air in front.

I have an 8.3 Cummins, and the compressor only has one belt, and it really needs 2. I keep losing or breaking belts. Do you know of a pulley that has 2 grooves to run 2 belts??

Thank you, Mark

Measure the diameter of the pulley and determine if it has a Woodruff key or press fit shaft from the compressor. Then contact March Performance Products and give them the data. They make pulley systems for ac, Power steering and alternator installations. The only problem with the dash systems is they are way too small (in BTU’s) to cool a coach of any size. There are solutions but they involve more time and money.

We ran the dash air on our last two coaches and loved it . I plan to make sure our next coach has dash air as well .

We run our dash a/c all the time. The caveat is that we have a 22' Class C on a Ford chassis and the dash a/c unit was designed and sized for what we have. On our 28' Regal, we ran the roof a/c as others have. A lot more cubic feet to cool.

Jim

quote:

Originally posted by Tom and Julie:
Measure the diameter of the pulley and determine if it has a Woodruff key or press fit shaft from the compressor. Then contact March Performance Products and give them the data. They make pulley systems for ac, Power steering and alternator installations. The only problem with the dash systems is they are way too small (in BTU’s) to cool a coach of any size. There are solutions but they involve more time and money.

The compressor has a dual pulley...I need the pulley for the engine!

Any pics of a dual belt on an 8.3 out there?

Thank you, Mark

We ran the ac compressor on a 8.3 Cummins with one belt for five years with no problems .

Could the alignment be off a little ?

quote:

Originally posted by Harold,Cat&Sam:
We ran the ac compressor on a 8.3 Cummins with one belt for five years with no problems .

Could the alignment be off a little ?

I have had no problems with my single belt on the 8.3. I would second the alignment question. Mine was originally not lined up well. The AC bracket allows for some adjustment.

I run the dash air. Had to put a used compressor in a few years ago. And yes I lose a little and have to aid about 2 cans a year. NO big deal. Did convert to R134 a few years ago. BTW single belt drive. The only problem is it could use a higher capacity system. Return to Yuma over labor day weekend we were fine until the temps reached over 100F. Had to fire up the generator and turn on roof air. Was still warm inside.

Howdy Mr Gary

That's similar to what we would do . The dash air did fine until the outside temperature topped 90 , then we would start the generator and run the two roof airs along with the dash air . Have to keep the pup cool

The gasoline engine A/C compressor is located right on top of the drivers side valve cover, the lines are in the way of lots of stuff too.
When I first got Nose I converted the R-12 system to R-134A and had the system running, it was not a lot of cold but it did cool mine and the passengers face. Then I had to do some engine work, change the valve stem seals, I had to take the compressor out of the system, so I never reinstalled it, took the condenser unit out when I put in the new radiator. I do miss it a bit, but it is not going back in, if I ever sell Nose they can have the system.