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Compressor will run but wont build more than 20lbs of air

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LOOK FOR AIR LEAKS-ALSO HIGH PRESSURE CUTOFF SWITCH MAY NEED
ADJUSTMENT.

Posted on Jun 21, 2009

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I have a 3 gallon 1HP Craftsman air compressor has worked fine for years but now it won't build air pressure over 20lbs. Any suggestions?


Make sure there are no air leaks first.
Your pressure valve may need resetting or replaced as it could not be working. Your compressor might be wore out.
Is there a gizmo that you can turn to set pressure. if so that might not be working if you have tried to set it.

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Craftsman air compressor model 919.16726 wont build pressure and makes a rattling sound


My compressor runs for about 5 min and shuts off.....does any one knows what could be the problem?

thanks

Aug 20, 2012 | Craftsman Air Tools & Compressors

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Have a power glide 2hp air compressor will start and run up to 120lb then shut off like it is supposed to then when it goes down to 90lb it tries to restart like it is supposed to but only humms will only...


Not speaking as an expert, but it sounds like your starting capacitor may be shot. Single motors typically have a starting capacitor if they are to start with significant torque.

Mar 05, 2011 | Air Tools & Compressors

1 Answer

1 hp 3gal craftsman compressor will only build up to 20lbs pressure in tank. how much compression should single cyl have on compression stroke?


A piston in any engine should be around 100 psi I would guess. A Chevy 350 used to be around 150 psi. An air compressor that only pumps enough air to reach 20psi is obviously too low on compression. Nailers and the like need 80 or more psi. The intake valves may be shot, the unloader might be stuck or piston rings are worn.

Dec 08, 2010 | Craftsman 3 gal. Air Compressor, 1.5 hp,...

1 Answer

Compressor runs but wont build pressure


You are probably leaking past worn rings and/or through dirty or broken reed valves. You don't mention a make or manufacturer. Contact them for repair parts.

Thanks for your interest in FixYa.com

Feb 23, 2010 | Air Tools & Compressors

1 Answer

Compressor tamk pressure


That small piece of rubber came from the compressor pump, more than likely you have a broken valve or blown head gasket in the pump, that is why it will not build pressure.

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1 Answer

Pressure loss


Does the tank have a serious air leak? If it looks like it is centered around the compressor, remove the cylinder head. Check and clean the intake and outlet valves. Check the safety valve on the tank that it is not leaking. Listen everywhere for a hiss while it is running. Make sure the belt isn't slipping.

Jul 16, 2009 | Craftsman 3 gal. Air Compressor, 1.5 hp,...

1 Answer

Husky comp on 1st start builds up 75 lbs and wont restart


Check the reset button on the motor to see if it tripped. The motor may be overheating. Some motors have an internal breaker and they have to cool off before they restart. Also check the pressure switch. Move the switch back and forth ( on and off ) and listen for a click. If it doesn't click with low to no air pressure then the switch is bad.

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