Question about Powermate 1.9-HP 26-Gallon Direct Drive Air Compressor - PLA1982712

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My Coleman air compressor starts and builds up proper pressure but wont start again once pressure starts dropping

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On my QRS air compressor i start it builds air pressure when pressure drops it dont turn back on i let it sit 20 minutes it will start again do same thing


check/replace the pressure control switch as one side (low pressure) is not working correctly and the pressure has to fall to low before it cuts in

Nov 15, 2015 | Air Tools & Compressors

1 Answer

Air is not building up pressure


There may be few causes for this.
1. The piston rings are worn out. If lot of oil comes in your receiver tank ththis is the indication to tell you that the piston rings and oil scraper needs to be changed.
2. The leaf springs strip is broken or worn out. If air is coming out of the suction filter open the compressor head with proper marking check and then fix back the same way you opened it.
3. One of the gasket is damaged or broken. Once again you will find air blowing out from the suction filter.

Aug 10, 2012 | Coleman Powermate 27 Gallon Air Compressor

1 Answer

Coleman POWERMATE Lo502710. Compressor runs and builds up pressure and then keeps on running even when 100 PSI. It will not shut off. I do not hear a leak when I pull the electric plug to make it stop...


There is a problem with your pressure switch. You should have a little black box with a red lever to turn your air compressor on and off. This housing contains your pressure switch, the pressure switch sends an electrical signal to the switch to make your air compressor run. When enough pressure builds up the pressure switch activates, and breaks the signal until the pressure drops below a certain point. I will do some more research on your compressor and find out which pressure switch you need to order. i need you to find any numbers on the compressor you can, serial number, model, stock number, anything you can to help me find the part number.
Thank you for patience,
Calvin Smith

Nov 19, 2011 | Coleman Powermate 27 Gallon Air Compressor

1 Answer

I have a new Puma La5721 and when I adjust the pressure to 120, it drops back to 90 and starts running aagain,after releasing pressure from below the switch box. Am I doing something wrong.


yes buddy it will do your adjusting the stop pressure so say you set it too 150psi once it reaches this pressure it will stop then as the pressure drops to about 120psi the compressore will restart and build to 150 again and you can adjust the starting pressure

Oct 11, 2009 | Air Tools & Compressors

1 Answer

Coleman powermate compressor doesnt hold air


CHECK YOUR TANK PRESSURE ADJUSTMENT KNOB ON TOP A LOT OF TIMES THERE NOT SET AT THE FACTORY.HOPE THIS HELP'S

May 22, 2009 | Coleman Powermate 11 Gallon Air Compressor

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.

Dec 30, 2008 | Campbell Hausfeld 5 Peak / 1.7 Running HP,...

1 Answer

Coleman compressor no build up of pressure


your correct either the valves are worn or maybe just need cleaning as for the gaskets,idont know what part of the world your in but check out coleman on the internet or failing that ,i have maid these from gasket material suuplied from my local bearing supplier

Oct 28, 2008 | Coleman Powermate 02 - Gallon Air...

1 Answer

Coleman 5Hp Compresser


All electric compressors share a basic design with ac power pressure switch with unloader and checkvalve between the pump and the tank. When the pressure switch powers off, it unloads the compressor by releasing the air in the discharge hose. You will notice a small tire stem pin and a lever to engage it somewhere on the pressure switch. If the compressor stops before reaching set cutoff point, the air pressure remains in the discharge hose not allowing the motor to start, thus the hum you hear. Solution is to check for the proper function of pressure switch /unloader, tank check valve (if check valve leaks air back to compressor it will load motor causing hum) and extra measure check capacitor for at least 90% of rated valve. Finally, do not run this compressor with an extension cord, use more hose instead. enjoy

Oct 22, 2008 | Coleman CP0302013 20 - Gallon Portable...

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