1995 Prevost XL with series 60
I started losing air pressure when at a low idle in traffic while making my way from Ohio to Oklahoma. As long as I was accelerating or idling at 1000 RPMs the pressure was fine.
We came upon several lane closures and slowdowns due to accidents and construction. Each time I would have to pull out of the lane of traffic and allow the pressure to build up before continuing. When I arrived in Oklahoma and turned off the engine I could hear an air leak on the passenger side of the engine.
The leaks are in the two metal mesh type hoses in this picture. The small one going up is an oil hose the large one going side to side toward the right bottom corner is the main air hose coming out of the compressor. These are special high temperature hoses with Teflon lining. As you can see the small line is fastened too close to the air line allowing them to rub. Each of them has a hole. (Although I did not realize the larger hose was leaking until later)
I was able to have the small hose spliced with a special coupling by Hose Specialties in Ardmore, Oklahoma.
The large hose isn't so easy. It is an air hose that feeds from the compressor toward the front of the bus and out of sight. It looks like it goes all the way in front of the drive axle without a junction. That means there is no way I can access it to remove it, replace it or splice it without a lift or pit.
It is also the special high temp hose with Teflon lining. Is it possible to have a coupling put on it? The small hose coupling was put in place by a press on a bench. There may be a more portable way to press the coupling in but I have no way of knowing. The hose specialty guy isn't open again until Tuesday. I didn't ask him on Friday because I didn't realize at the time that the air line also had a hole. Of course now I am 150 miles farther away from Ardmore than I was.
A friend that was helping me wrapped the air line with a rubber patch and put a hose clamp over it... In this picture you can see that temporary fix and the coupling in the small hose.
Both of us were dubious about the effort to stop the leak but believe it or not... It worked! I needed to go about 150 miles yesterday and it held pressure until I arrived. While I was parking I began to lose pressure again and when I turned off the bus I could hear air escaping again.
It occurred to me this morning that there is a possibility that the hose leak is not the major problem and that the system doesn't leak until it is good and warm. But then again it had been running over three hours yesterday before I started losing pressure. Any thoughts on that?
Any ideas on repairing the hose? Keep in mind that I cannot get the hose off without a pit or lift. I am wondering if this hose can be repaired without removing it. Any help would be appreciated. I am in Blair, Oklahoma and should be here about two weeks. My next route is through Oklahoma City and Tulsa to Neosho, Missouri.
Thank you in advance,