Air compress or will not get to top pressure - Lawn Mower Forums : Lawnmower Reviews, Repair, Pricing and Discussion Forum
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post #1 of 9 (permalink) Old 08-24-2018, 06:07 AM Thread Starter
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Air compress or will not get to top pressure

Hi all,
I have a little All-Power Model AC 1508-HM air compressor that I use to pump up tires etc. It will not get up to top pressure. It will just run and run until I suppose that the motor would burn out. I have already taken it apart, checked and replaced the gaskets, but that did not help. What else can I check?
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post #2 of 9 (permalink) Old 08-24-2018, 07:43 AM
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Do you have any leaks? Might be bad seals on compressor itself.


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post #3 of 9 (permalink) Old 08-24-2018, 10:08 AM
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at some point those little compressors just wear out and dont have the compression to pump any more, most of them that arent commercial grade dont have rings, its just the piston sliding in the cylinder and when it wears down its just time to toss it out and replace it
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post #4 of 9 (permalink) Old 08-24-2018, 02:28 PM Thread Starter
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I took apart the piston and the rings & cylinder are both clean and smooth. I will take apart & clean more connections next.
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post #5 of 9 (permalink) Old 08-24-2018, 08:50 PM
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Like Keaker says, these compressors have a limited service life. They typically have a silicone sealing ring with some grease for lubrication, so they don't last all that long. You still might just have leak though, so definitely check any connection points!

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post #6 of 9 (permalink) Old 08-24-2018, 09:13 PM Thread Starter
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I checked most of the seals so far and I am trying to discern whether the hissing noise I hear at the from of the unit is from the fan or from something under the electrics. There is a small copper hose attached to the unit under the on/off switch. How does the air supply travel under there? Any guesses?
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post #7 of 9 (permalink) Old 08-25-2018, 01:12 AM
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That is probably the line going to your pressure switch. That is what turns it off and on based on tank pressure. Possible the switch itself could be leaky.

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post #8 of 9 (permalink) Old 08-27-2018, 12:27 PM
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To me there is a big difference between the noise a fan might make and the hiss of an air leak. I'm going to guess you are hearing an air leak and you might want to try and put a little bit of dish soap with water in a spray bottle and try seeing where it bubbles.

You obviously want to be careful of the electrical connection. Just mist it on.

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post #9 of 9 (permalink) Old 08-28-2018, 08:40 AM
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If you have lots of free time these can be patched up. Sometimes the parts are available. If your time is valuable just throw it away.
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