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Engine Oil Residue in Air System
We had a significant air leak from the main tanks which I had Prevost Dallas repair last week. The tech mentioned that there was engine oil residue he found in the values he replaced. My thought is that there is a seal leak at the compressor. Can that be rebuilt or should the compressor be replaced?
We are new to Prevost but owned Foretravels for about 25 years and haven’t experienced this before. Any education would be appreciated.
Thanks
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6 Replies
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What year is the coach? How many miles? Compressors do not last forever and will wear out and pass oil or leak oil.
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Hi we also owned a U320 before our Bus, I really liked our Foretravel It was a great rig, I still talk to the new owner from Evens indiana and he loves it. This is our 2nd Prevost 1st before Foretravel was a 1980 Liberty and after Foretravel is a 97 Royale. After owning both coaches the Prevost is way better built like a tank. Have you serviced the dryer on Bus yet? I will get a drip of oil out of wet tank some times when I check it but after wet tank dry. When we bought the Royale the dryer was in bad shape, I serviced it then I finally replaced it with a new dryer Bendix 89D. System is clean now everything works great. Like I said I get a little oil residue out of wet tank but after that clean,I’m not going to worry about it.
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Yes the engine driven air compressor can wear out and pump engine oil into the air system.
Our bus has a Bendix Tu-Flo 750, pt# 107623. Rebuilt unit can be had from NAPA or ebay for about $400.
Here’s a Bendix pdf catalog: LINK -
It’s a 2003 Marathon XLII Series 60 with 233,000 miles.
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Thanks
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I wouldn’t necessarily rush to judgement. Air tanks are supposed to be drained periodically (I do mine every 10K but I think the recommended time is more like 6K) to eliminate oil and water condensation. Also, as others have mentioned, the condition of the air dryer is important.
Sounds like you’re new to the coach so I would check these items out before going for a compressor. I have about 255,000 on my coach and I’ll get several drops of oil out of the first tank every 10,000 when I drain.
By the way, when I first got my coach it had about 50,000 miles on it and it was 5 years old. When all the air tanks were opened at the same time on a lift, the floor had to be mopped before continuing with service.
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