02-13-2024, 01:59 PM
Hello all! I have air leaks that, so far, I haven't been able to find. I watched the videos on Newell's air systems and found them very helpful in understanding how these systems are designed. I bought a leak detector, a few DOT compression fittings, and with bubble soap and lights, started checking all the connections mapping my system as I went.
In all the bays, left side and right, I didn't find any leaks. The front and rear 6-packs seemed fine. Inside, I found a small leak in a 1/4" push-in fitting in the break system under the dash. I replaced it with a compression fitting. I found a leak in the driver's chair, but the previous owner had a cut off valve installed. I closed it and the leak stopped. I still have the dash gauges to check as soon as I can figure out how to get to them. All the toilet connections are good. I have 3 air doors that I haven't got to to check.
I have not been able to get under the coach due to another issue with HWH that only allows the coach to get to travel height.
The results so far: the 120v pump comes on every 4.5 minutes. This seems like a sizable leak to me. Usually, it's been holding for about 45 minutes.
I turned off the 120v and turned on the 12v (which I never turn on). Sure enough, about 45lbs, the pump comes on, however, it's extremely noisy and the gauge doesn't change. I'm thinking the pump is gone. It's a little difficult to get to behind the Aqua Hot overflow tank.
My main question at this point is: Could a defective 12v pump cause the leak? Does anyone know a replacement model? What should I check next?
In all the bays, left side and right, I didn't find any leaks. The front and rear 6-packs seemed fine. Inside, I found a small leak in a 1/4" push-in fitting in the break system under the dash. I replaced it with a compression fitting. I found a leak in the driver's chair, but the previous owner had a cut off valve installed. I closed it and the leak stopped. I still have the dash gauges to check as soon as I can figure out how to get to them. All the toilet connections are good. I have 3 air doors that I haven't got to to check.
I have not been able to get under the coach due to another issue with HWH that only allows the coach to get to travel height.
The results so far: the 120v pump comes on every 4.5 minutes. This seems like a sizable leak to me. Usually, it's been holding for about 45 minutes.
I turned off the 120v and turned on the 12v (which I never turn on). Sure enough, about 45lbs, the pump comes on, however, it's extremely noisy and the gauge doesn't change. I'm thinking the pump is gone. It's a little difficult to get to behind the Aqua Hot overflow tank.
My main question at this point is: Could a defective 12v pump cause the leak? Does anyone know a replacement model? What should I check next?
David and Teresa Brown
1999 Coach 513