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Old 07-28-2017, 12:40 PM   #1
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1978 28' Argosy 28
Minoa , New York
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Suspension Compressor Cycling

I noticed my rear suspension compressor was running often even when parked. I found and fixed a small leak but notice even when it's parked on a flat surface the compressor cycles on for twenty seconds every three and a half minutes. I can't find any leaks though there must be one somewhere.

If you park your rig on a flat surface and turn the key on or leave the engine running, does your compressor cycle on / off? Is every three minute excessive, will it burn out the compressor?

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Old 07-28-2017, 01:58 PM   #2
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Sounds like a leak to me. It shouldn't cycle like that. But if its cycling that quick I would think it would be easy to find the leak......hmmmmm..might be the pressure switch too. Its telling the compressor when to cycle according to psi. Have you soap tested all your fittings? I would do that first.
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Old 07-28-2017, 02:41 PM   #3
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Three minutes sounds excessive to me.
I never counted, but while driving, if I watched my air gauges, they drove me nuts. Sometimes low (80) sometimes high (120)
I finally quit watching, but I know they lose air with dump valves, brakes, dryers, ride height adjusters.
If I had to guess I'd say mine cycled every 10 minutes.
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Old 07-28-2017, 03:45 PM   #4
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Leak.

Take a bottle of soapy water and spray down the air bags. Specifically top and bottom which is where the leaks typically occur (where rubber is joined to the assembly). Look for bubbles. Bubbles = replace airbag.
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Old 07-28-2017, 08:12 PM   #5
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If you don't find any obvious leaks take a look at your check valve. It should be in the line coming out of the compressor. When they foul or freeze up the air bleeds back through the compressor and is difficult to detect.
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Old 07-30-2017, 05:02 PM   #6
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1978 28' Argosy 28
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Thanks. I did the soap test and still can't find it. I'll check the check valve.
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