I found an air system leak!

[MyPrevost]

Yeah, it’s been bugging me for weeks. My main and auxiliary air gauges were dropping to zero overnight. I checked all around the coach for leaks but found nothing. Finally, I pulled the panel where the gauges were mounted and discovered a leaking line about 12 inches back (1/8″ line) from one of the gauges. I replaced it with a brass inline fitting, which slowed the leak but didn’t stop it.

Then I found that both gauges were leaking where the lines connected. I removed them, took off the fittings, shortened the lines, and reinstalled everything, but still had leaks. I tried to buy new fittings at NAPA, but the counter guy claimed, “they never fail.” So, I ordered two 66PC-2-2 copper 1/8″ pipe-to-tube fittings online from “Fitting Supply.” After changing those, no more leaks!

The air tanks are holding steady now, and I’ve got one less concern! Sorry, no pictures to share.

[MyPrevost]

Mike,

Air leaks are a big concern for all Prevost owners, especially for me.

I remember hunting down several leaks in my braking system, similar to what you experienced with your dash gauges. It feels great to finally locate and fix those pesky leaks! While a completely “leak-free” Prevost suspension system might be a dream, achieving a “near leak-free” system is definitely possible with enough effort.

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I also recall your post about the 12-volt versus 24-volt alternator on your Country Coach. I had already bought a 24-volt alternator in anticipation of replacing mine due to oil leaks. Thanks for sharing the alternator info—it saved me a lot of hassle!

Have a great day!

Hector

[MyPrevost]

I had a slow leak coming from my belt tensioners, and after a few checks, I couldn’t locate it. About a month ago, while working on another task in the engine bay, I heard a faint hissing sound near my ear and accidentally found the leak. It was so small that it was tough to see, even when soaped. I repaired the fitting, and now everything’s good! I totally understand the excitement of finally finding the source of the problem!

[MyPrevost]

Say, does anyone know the recommended air pressure for the belt tensioner?

[MyPrevost]

Congrats, Mike!

It’s always such a satisfying feeling to improve the bus, especially when it comes to fixing air leaks.

Personally, I’m perfectly fine if the auxiliary compressor only kicks on once or twice in a 24-hour period. If I can manage to get it to run several days between starts, I’ll be ecstatic!

[MyPrevost]

Orren, I think it’s 45psi

[MyPrevost]

Thanks Kevin!

[MyPrevost]

Say, does anyone know the recommended air pressure for the belt tensioner?

45 to 50 psi

[MyPrevost]

I jumped the gun and answered before I saw Kevin’s reply. Sorry about that.

[MyPrevost]

I jumped the gun and answered before I saw Kevin’s reply. Sorry about that.

Thanks Scott, I dialed it in last night.

[MyPrevost]

Scott, always good to get that info from the source, don’t ever hesitate to correct or add to my posts. I just guess at this stuff!

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