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Prevost Dash Air – High Pressure
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The comment to run the engine at 1500 is a valid point. That may be the difference. Try running the engine at 1500 RPMs and see if that makes a difference. Then it will be interesting to see what pressure it is cutting out at.
Mikee
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Where are you now, Tom? I am not using my gauges now but I plan on using them the beginning of Feb. Or Jeff can do what I am suggesting easier because he knows the system far better than me.
I do remember Jeff was working on someone’s dash air coach and he was getting the wrong expansion valve. It wasn’t yours was it? I assume that has been resolved at Prevost, but yours could have been one that got the wrong one.
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Hmm, didn’t know that, I’ll check it out thanks…
Jeff – Are you awake?
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That was my Legendary. Prevost shipped the wrong parts about 3 times. Wound up going to Nashville and even they had issues finding the right parts…took them a couple of attempts also. They finally figured out that if they looked it up under a MH shell, even with the correct VIN, the system was wrong. They put it in as a bus, and then got the right parts somehow, and even had them in stock.
Got the expansion valve and dryer in and the a/c really worked better than it ever had.
It seems that that particular bus was at the begining of a model change out, and things were messed up in the parts system according to the tech who did the work at Prevost.
I never had the light come on though…just no cooling, or very little.
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I have found that if the clutch gap is over 15 it may slip at higher engin speeds.
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