Question about Coleman Powermate 02 - Gallon Air Compressor

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Pressure release valve pops off

At 125 psi just as compressor is stopping. Now compressor restarts to repute the stop and go all over again.

Posted by Anonymous on


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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

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SOURCE: Compressor pressure only to 60 lb psi and no more

not sure but it sounds like the piston ring is worn out or you might have a bad valve.
p.s. its not your typical valve like in a car.

is it a wet compressor, check the oil.

Posted on Feb 21, 2010

  • 6927 Answers

SOURCE: Compressor starts for about 2 seconds, stops and

Yes it is the pressure switch ***.If you have been adjusting it,this maybe the problem,if not,replace it to repair the problem,and thank you,please rate.

Posted on Jun 15, 2010

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SOURCE: I have a 5 HP

You did not list model number, however if you have oilless type check the cylinder/piston by manually turning crank until piston is at top and examine cylinder for wear or scratches. If worn replace cylinder kit for full pressure. If ok check reed valves /valve plate for wear or broken reeds. If oil bath type, problem is usually air leak or reed valves / valve plate. As a general rule, you can keep track of wear by noting how many minutes it takes to fill the tank to cut-out. As the compressor wears it will take increasingly longer to fill. When new, and depending on tank size/ hp, most compessors fill within 2 ~ 5 min. Good luck

Posted on Sep 24, 2010

  • 1274 Answers

SOURCE: 27 gal upright tank, 5

Hi, my name is John. Welcome to FixYa. Yes, its your pressure switch,replace. Thanks for choosing FixYa...John

Posted on Nov 23, 2010

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SOURCE: my compressor will start if the pressure is zero

Hi, my name is John. Welcome to FixYa. You need to replace the pressure switch and you will see the cut in psi and the cut out psi rating. Make sure you bleed all the air out of the tank first. You can order one here . Thanks for choosing FixYa....John

Posted on Nov 27, 2010

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Makita MAC5200.Brand new.Just broke-in. Pressure goes to 140 PSI and stops.Tries restart at 110 PSI.Motor"Humms"only.Will not restart until pressure below 20PSI.
There is a part called an unloader. It reduces the pressure on the compressor when the unit stops at the desired pressure. The actual unloader may be part of number 50 in this diagram.

Dec 18, 2016 | Makita Air Tools & Compressors

2 Answers

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)

Nov 20, 2014 | Air Tools & Compressors

1 Answer

Air compressor not unloading

Check the pressure switch. The unloader valve is actually in the pressure switch where the small air line from the tank check valve attaches to it. When the pressure switch turns the motor off it then lets the head pressure bleed off so the motor can restart the next time pressure drops in the tank. If it's not working and bleeding off the head pressure the cold start valve (the one with the pin in it) also won't open so the motor can restart and warn up properly.

Sep 09, 2012 | Dewalt D55153 1.1 HP Continuous 4 Gallon...

1 Answer

125 psi sears air compressor only goes up to 40psi and will not stop running I've replaced pressure switch and manifold.

If the unit will only pump to 40 psi. then here are a few things I would check...

Check the air filter to make sure it is clean so air can be pulled in easily...
Check the relief valve to make sure that it has not gone bad and is releasing the air pressure or leaking at 40 psi...
Make sure the any hoses or nozzles are tight and not leaking...

If all of this checks out then the compressor has an internal problem such as bad rings or valves that will keep it from pumping to a higher pressure...
The pump will need to be torn apart to find the exact cause of the problem... and many times the correct replacement parts will not be available to rebuild those compressors..


Jul 26, 2011 | Garden

1 Answer

I have a Dewault D55141 air compressor that runs to 150 lbs of pressure and blows the valve and releases air. I bought it new about 2 yrs ago? What needs to be done with this problem? I noticed on this...

150 is your cutout pressure. It's the factory setting and is not a problem. But, It appears you have a pop off (safety) that is set for 125 psi, So, If you want 150 psi, the pop off needs to be adjusted. If you want 125 the the cut out switch needs the adjusting. The setting. More than likely the 125 psi pop off valve is correct and the switch needs to be adjusted down below the pop off pressure. To sdjust the switch, remove the cover of the box the cord comes out of.Adjust using the screw(s). There should be one for cut in and another for cutout pressuressures. The cut in pressure should be 90 psi and the cutout should be at 125 psi.If the pop off valve blows off at 125, It needs either replace or adjusting. It's best to replace it.since the spring inside has lost tension. You will be constantly adjusting it otherwise. Good Luck -Ned_ Take caution not to get your tool or fingers into the electrical in the switch box.

Apr 15, 2011 | Dewalt & 2HP Hand Carry Heavy Duty...

1 Answer

Ok....My compressor knowledge and terms of parts is very weak...So I will try my best to describe my problem....When I bought the Campbell 8 gallon compressor, and when I started to use it, in the...

The compressor will fill slowly if there is a leak at a fitting or pressure leaking back from the checkvalve. It will also fill slowly if there is a worn / broken reed valve/s and or leaking gasket in the head. Try easy test first. With compressor running and air filter off, spray soapy water on all joints looking for leak (also spray on head of pump to check leaking bolts /gaskets). If leaking, repair as needed. If no leaks are found with soapy water, stop compressor and listen for leak at the pressure switch unloader valve. If no air appears to be leaking from the compressor then most likely problem is with reed valves or gasket in the head. Remove head very carefully trying not to tear gaskets. Examine reed valves for broken parts and or burned /broken gaskets. If gaskets or reed valves are bad, the discharge air tube will be very hot. Repair as needed. Good luck

Jan 18, 2011 | Campbell Hausfeld 8GAL Air Compressor

1 Answer

Can I limit the pressure to 120 PSI, the upper recommended limit for my nail gun?

adjust your pressure switch on your compressor .remove the cap and turn the screw clockwise to increase and counterclockwise decrease.turn the screw counterclockwise a bit and release some air till the compressor start pumping.then just before to reach 120 psi turn counterclockwise to stop the compressor at 120.then release some air again till it cuts in again and look at what pressure it will stop.keep going that way till you get your 120 psi.cut in should be around 90 psi(30 psi differential)depending what kind of pump you have (if the pump can handle 150 psi )you can adjust it to cut in at 120 and cut off at 150 and install a pressure regulator adjusted to 115 to 120 and get a nice steady pressure going to your nail gun.(the best way to do it!!!)

Jan 17, 2011 | Air Tools & Compressors

1 Answer

I have craftsman 20 gallon five horse compressor. It pumps up to a certain psi and then it bleeds the pressure until it reaches a certain point and then pumps up again. The way its lets the pressure out...

The operation of that compressor is that the pressure switch will open when it reaches its set pressure, usually about 125 psi. when the switch opens and the motor comes to a stop the little valve on the side of the switch is meant to unload the pump head of pressure for the next start up. the pressure in the head and the tube leading to the tank is what is relieved, to prevent tank pressure leaking back there is a check valve where the discharge line enters the tank. what it sounds like is that check valve is not closing when the pump stops, and should be replaced.

Aug 26, 2010 | Craftsman 20 gal Horizontal Compressor

1 Answer

I changed the regulator twice and the compressor still does not stop at the psi where i want it.

The pressure regulator adjusts the line pressure! The pressure switch is what turns the pump on and off. If you are trying to maintain a line pressure with the switch and not the regulator,,, you are never going to accomplish that. I would have to guess that your compressor normally run's between 95~125 psi on the "switch" so if you adjust your pressure regulator to 110psi it will maintain that till the tank pressure drops below that point. then it will drop as low as 95 until the pump restarts again. If you are trying to get the switch to run up higher than that,, "stop now" as you will only burn the thing up by trying to go higher that it was designed to run at from the factory!

Jan 10, 2010 | Campbell Hausfeld 04 Gallon Twin Stack...

1 Answer

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.

Jul 25, 2009 | Porter Cable 18 - Gauge Brad Nailer and...

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