Question about Craftsman eVolv 3 Gallon Oil-Free Compressor

1 Answer

Is it pop-off valve?

Pop-off valve kicks out around 80 psi compressor will not fill completely and cycle automatically like it should

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Yes or it's opening because your gauge is dangerously off...

check and make sure

Posted on Dec 30, 2013

6 Suggested Answers

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

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Posted on Jan 02, 2017

  • 234 Answers

SOURCE: My 33 gallon air compressor will at start build up

Most likely it is the unloader valve. This is inline with the air filltube from compressor to tank. Somestimes the unloader valve is screwed into the tank and air tube is attached to it. This device takes the pressure out of the tube so the compressor can start without the back pressure from in the tank. Other possibility, the start capacitors of the motor. The capacitors must give a kickstart upon startup or the motor will just hum for a couple seconds and overload the breaker. A tempoary solution is to turn off the power to compressor when it reaches 120psi, then allow the pressure to drop to 40 or less, then turn power on and mostlikey compressor will start with a load of 40psi or less. It is a nuisance but it works until you replace the bad part. Goodluck,Macgivor

Posted on Jan 16, 2010

  • 20 Answers

SOURCE: 26 gallon model 919.167700 160 psi 1.6 hp Bottom

if it's leaking from the center ,try loosening it let air blow out & tigthen .--- if it's leaking from the theads try tigthening it some more without breakage //////// this valve is the same as a metal radiator petcock with pipe threads that are tappered // return the compressor if still under warranty or try pipe dope -- check for crossed threads--buy new petcock from auto parts store .....a street elbow & 4'' of pipe & quarter turn vavle from the home depot ( or similer supply store ) works nicley as a replacement / this way you can reach the valve to drain the water with out laying on the ground.--------------1/4 pipe thread i think .

Posted on Jun 06, 2011

  • 20 Answers

SOURCE: I have a craftsman oiless air compressor. All

check your hose or couplers for restiction --------- try exchaging with know good ones------- the rubber seal in the female coupler may be the culprit ------------torn// deteriated// comming apart & blocking off air flow....

Posted on Jun 06, 2011

  • 8 Answers

SOURCE: I have a craftsman air compressor #919.167320. It will only build pressure up to 80 psi and the pump will continue to run. I checked the check valve according to the manual and it seems fine. Any sug

Hi, I have a sears compressor I will take the gauge and have them check for a problem, and will replaced it good luck.

Posted on Nov 18, 2012

  • 1383 Answers

SOURCE: compressors kicks breaker at 60 psi.

This is usually caused by long extension cord, leaking check valve or weak capacitor. Most likely leaking check valve. Easy to check, run compressor for a couple of minutes and shut off. Listen for air leaking from pressure switch or at the intake filter. If leaking, let out air and remove check valve and look for debris stuck under the valve seat. To find the checkvalve, follow the air discharge tube from the head of the compressor to the tank. You should find a brass or chrome valve threaded into the tank. If check valve is not leaking, suspect weak capacitor or long cord (motor shop will test cap for free). Good luck

Posted on Apr 02, 2013

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My air compressors filled up with air and shut off when the air got below a certain psi and did not kick back in to fill the tank can you help me.


Pressure problems can be several pressureline leaks


If an air pressure switch (pressostat) does not return replace the pressure switch a gray colored or white or black colored box with the powercables comin to and the power knob on it red black gay or other color. that is the problem itself in this case . the mechanic jumped not up it hangs , best is to replace the complete part.

If the compressor filling the tank and when its reached the pressure and it blow from out the safety valve then the pressostat its too high adjusted. there is a max pressure on the valve to read is it blow off below the max replace the safety valve.

Is your pressure is build up but it blow out the Pressure relief nipple its a part of the pressostat in most case , the your Non-return valve on the tank is dirty or by dirtable metal parts from the pressure line membrane parts .

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My D55141 heavy duty 2gal (7.6L) 150 psi max builds pressure up to around 150 releases pop off valve then keeps running, what causes this problem?


The pressure switch is either out of adjustment or has failed. The compressor should shut off at a much lower pressure than the safety valve (~100 psi)

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POP OFF VAVLE ON HEAD KEEPS POPPING UP


The over-pressure relief valve may be defective if the valve is opening before the desired tank pressure is reached. If not, then the shut-off pressure adjustment (if there is one) may be set wrong. You'll need to find out from the manufacturer exactly what static tank pressure the compressor is designed to provide and then determine if it is working correctly. If so, then the relief valve might be defective. DO NOT attempt to defeat the relief valve under any circumstances - it can result in compressor damage or a dangerous tank failure.

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this compressor should be able to fill your tires to 80 psi. Look for a pressure switch and adjust it so the motor shuts off at a higher pressure. Do not exceed 100 psi.

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1 Answer

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Easy fix, replace faulty relief valve, also look at the on/off cycle switch!

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My model CAP 60p-OF runs up to 80PSI then won't shut off, and can't get past 80 PSI. All they would tell me at the customer service was to take to a repair center. SInce that involves a $20 fairy ride and...


If your compressor is still under warranty it may be worth the trip, anything you do to it will stop/void your warranty. That being said, your compressor won't shut off until the pressure switch sees 130 to 150 psi in the tank. A couple problems will lead to what is happening to your compressor. First check your valve plate assembly, it's right under the head. All of the reed valves must be in perfect condition, no cracks, chips or warpage and laying completely flat against their respective holes. Basically the the bigger the leak around the valves, the less pressure that can build up in your tank. If you are getting 80 psi you're looking for a very small leak. If the valve plate is OK check your piston and cylinder. The cylinder should be very smooth and the ring on the piston must be tight and facing up all around the piston. They are bad for a small section turning downward and letting air leak out. Just like the valves the smaller the leak past the piston, the more pressure you'll get so look for any imperfection in the cylinder or piston ring. A fairly good place to find parts is www.ereplacementparts.com. You can get a good breakdown of your compressor and order parts from them.

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1 Answer

Compressor runs until overload release valve opens (pressure at 130 psi) and then air escapes until pressure lowers to 100 psi..Then motor begins to restart, but will not , due to 100 psi and kicks breaker...


There is a check valve between the compressor and tank, and there is also an 'unloader valve' which blows the pressure off the compressor so that it starts under little load. I think your check valve is stuck open and the unloader valve is blowing tank pressure off.. and when the compressor tries to start it's starting against the pressure in the tank.

So check/replace/thaw the check valve and you'll be good to go. It's generally at the tank where the line from the compressor head goes into the tank, it'll be between the two somewhere.

lp

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Compressor blows off, does not maintain pressure


Hi there. This is normal. The pressure is set to stop at around 120-140 PSI as a safety measure. It probably kicks in again around 80 PSI so as to remain pressurized between 80 and 140 PSI. Since most air tools operate in this range, it is ok for the compressor to maintain pressure in that range. You do not want to adjust the maximum pressure safety release valve as it could be extremely dangerous as certain components in the compressor may only be rated up to 140 PSI or slightly higher before they fail or blow apart.

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this sounds like a bad pressure switch.if the unit is not shutting off at the same pressure each time this would be the cause.2 if the pressure is not unloading the air pressure on the compressor side of the unit it will cause the unit to struggle when it starts a cycle because the piston is under a load .how this works is say the unit starts from 0 psi when it get to the desired pressure you have it set on the unit kicks off . the other adjustment most units have on them is what pressure to cycle back on.so when the unit reaches say 100 pounds ,it kicks off and bleeds the air off the compressor side so when it starts back up it wont start up with pressure on the piston.

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