Craftsman eVolv 3 Gallon Oil-Free Compressor Logo

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Anonymous Posted on Nov 19, 2013

My evolv 3 gal. air compressor check valve kicks out at about 80 lbs of pressure and drops pressure to about 60lbs and runs continuously, it never fills and shuts itself off before the check valve kicks in and drops pressure.

5 Related Answers

John Trevino

  • 1420 Answers
  • Posted on Dec 21, 2008

SOURCE: compressor will not pressurize

A simple check to see of the compressor is pumping is to remove the intake air filter and feel for suction. If the pump is working properly you will feel suction at the intake and the compressor will unload (speed up) when you restrict the opening. If no suction remove the head and valve plate and check the piston and reed valves for damage. Replace parts as needed. Parts are not expensive for small compressors. Good luck, enjoy.

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Anonymous

  • 5 Answers
  • Posted on Jul 15, 2009

SOURCE: my sears 2hp 15 gal compressor runs but pressure wont exceed 60lb

compresors pump, valvs or sels gon!

protek480

Craig Butler

  • 1730 Answers
  • Posted on Jul 20, 2009

SOURCE: compressor not building pressure and continues to run

Unplug it and listen for air leak. What pressure does the manual tell you it should run to? The safety release could be bleeding air, listen for that, with it off. Make sure it is designed for more than 60 PSI by manufacture.

If you need further help, I’m available over the phone at https://www.6ya.com/expert/craig_3fa289bf857b1a3c

Anonymous

  • 50 Answers
  • Posted on Sep 24, 2009

SOURCE: Craftsman 3 gal., 1.5 hp air compressor: won't

The compressor will not auto shut off until it reaches the preset pressure which is usually around 100-130 psi - your problem is leakage of air from the oil filler cap suggesting that you have a failed internal valve.

John Trevino

  • 1420 Answers
  • Posted on Jul 08, 2010

SOURCE: I have a Sears evolv 3 gal air compressor that

The evolv air compressor was primarily designed to power a very small nailer. The pressure regulator (knob in front) should be turned clockwise till it stops to attain full pressure. At this setting it should air your tire. If not you may have a defective regulator. There is a trick to get full pressure from your tank. Notice the small pressure safety valve on the side of the unit. You could remove this valve and install a fitting giving you two ports. One for the safety and other for a quick disconnect. This second port will give you access to tank pressure without going thru the pressure regulator. This mod is safe because you still have access to regulated pressure when you need it. Good luck

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I have a 5 gal, i hp craftsmen compressor, 3 years old, used once a year to blow down sprinkler system. Compressor ran up to 120 lbs upon turn on, would not cycle off. manually shut off unit and turned...

Oil free pumps do tend to blow the piston ring (not too expensive) available at searsparts.com. Remove covers to pump and manually turn crank until piston is at top and look at the condition of the cylinder neer top, If it looks scratched, order cylinder kit with piston ring. If it looks good and shiney, could be the valve plate in the head. There are reed valves that tend to break. Run pump however with covers removed and check with soapy water for air leaks and repair as needed (air leaks under the cover will prevent unit from filling). Good luck
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I have a Sears evolv 3 gal air compressor that will not inflate a auto tire, even a partially de-flated tire. I let the pressure build to 100 psi and checked all fittings. Still wil not do it. Compressor...

The evolv air compressor was primarily designed to power a very small nailer. The pressure regulator (knob in front) should be turned clockwise till it stops to attain full pressure. At this setting it should air your tire. If not you may have a defective regulator. There is a trick to get full pressure from your tank. Notice the small pressure safety valve on the side of the unit. You could remove this valve and install a fitting giving you two ports. One for the safety and other for a quick disconnect. This second port will give you access to tank pressure without going thru the pressure regulator. This mod is safe because you still have access to regulated pressure when you need it. Good luck
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WILL NOT BUILD UP AIR PRESSURE PAST 20 LBS.

Check to see if air is leaking past 'pressure relief' valve. It's probably leaking and that's where all the air is going.

If you need further help, I’m available over the phone at https://www.6ya.com/expert/craig_3fa289bf857b1a3c

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the valve plate or the piston damage
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Unplug it and listen for air leak. What pressure does the manual tell you it should run to? The safety release could be bleeding air, listen for that, with it off. Make sure it is designed for more than 60 PSI by manufacture.

If you need further help, I’m available over the phone at https://www.6ya.com/expert/craig_3fa289bf857b1a3c

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Craftsman 3 gal ari compressor low presure

put a blower on the hose and see if air comes out
very possible there is a blockage in the hose or if you are using quick connects they may have failed
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