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Need a Prevost Expert!!
1991 XL40 bought used from Prevost Jacksonville. Plan on converting myself since I am a retired general contractor. My air system has gone from BAD to worse! It started with runaway air pressure peaking at 150 psi, I changed the governor (No change to pressure build). Jacked up bus to drain wet tank … Oh man, it drained water for 5 minutes and then sludge dripped for another 3 minutes. Decided to check the AD2 dryer, after pulling it down and opening it up it was empty. The dessicant beads were gone and it just had a film of the sludge in it that dripped from the wet tank. Went to replace the complete filter dryer unit because it was rusted badly but the parts house said it was obsulete so I got a AD 9 and installed it. Now the coach will build air a little and stop pumping. The Primary gauge stops @ 70 psi and the secondary stops @ 50 psi. Why do the gauges show 20 psi difference in pressure? The air supension system won’t even lift up a little. I keep being told the compressor is Bad it’s not Bad, it’s Bad it’s not Bad. I have been told by so many people until I am totally confused now. When out yesterday disconnected the rear fill valve line at the AD 9 dryer (with no air in the system … of course) cranked the coach and air was coming out of the exit side of the filter dryer. Not sure how much air the compressor pumps but it seemed substantial … just guessing probably 30 psi. Does anyone have any advice on where to go to from here? Could my lines be plugged up from the sludge?
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