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Old 01-04-2018, 05:42 PM   #1
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Air compressure

How do i check to see if the air compressor is out verses an air leak? I don't hear any leak but i lost 10 lbs everytime i hit the brakes

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Old 01-04-2018, 05:46 PM   #2
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How do i check to see if the air compressor is out verses an air leak? I don't hear any leak but i lost 10 lbs everytime i hit the brakes

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If your compressor is not working at all, you will never build air pressure.
If you have air pressure, but use it faster than you can build it... Then you may have an air leak or your compressor is going bad.
Only way I know to check for an air leak would be to let the system build full pressure, turn off the engine, and them listen/spray soapy water on all the air lines.
There are ways to check the compressor, but I am not well versed.

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Old 01-04-2018, 05:48 PM   #3
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Plus, every time you press the brakes, you will use air. The compressor will have a low pressure cut in and a high pressure cut out.
So it will charge to say 110psi, then as the air is used it will bleed down to 85psi before the compressor cuts in.

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Old 01-04-2018, 05:51 PM   #4
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Are there any valves right after the compressor to close the outgoing lines. Close if any and let compressor run till it shuts itself off at working pressure or runs steady. If it runs steady then it's not working or bad pressure switch likely.

John
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Old 01-04-2018, 05:52 PM   #5
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Plus, every time you press the brakes, you will use air. The compressor will have a low pressure cut in and a high pressure cut out.
So it will charge to say 110psi, then as the air is used it will bleed down to 85psi before the compressor cuts in.

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I can't tell if it's going bad but i think it is. It has been staying at 60, but i got it to move and it dropped to 20 and locked up. Now our doesn't want to charge

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Old 01-04-2018, 05:55 PM   #6
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Are there any valves right after the compressor to close the outgoing lines. Close if any and let compressor run till it shuts itself off at working pressure or runs steady. If it runs steady then it's not working or bad pressure switch likely.

John
I think it's this cold. Ill check for the valves in the morning. I could put a tie in and fill the tank with a portable. Then i could get somewhere to really look at it

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Old 01-04-2018, 06:00 PM   #7
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I can't tell if it's going bad but i think it is. It has been staying at 60, but i got it to move and it dropped to 20 and locked up. Now our doesn't want to charge

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Good luck. Where are you at?

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Old 01-04-2018, 06:01 PM   #8
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Yes, somewhere warm, inside and that things out, must be moisture involved in the system.

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Old 01-04-2018, 06:02 PM   #9
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Good luck. Where are you at?

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St. Louis. South city

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Old 01-04-2018, 06:03 PM   #10
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St. Louis. South city

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It isn't much warmer out here in New England. Single digits tonight and negative for the next few days

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