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My CH compressor runs good but will not build pressure in the tank

It worked fine and a few days later I went to use it again and it would not build pressure in the tank. Model # WL670100AJ Pump # Wl390100AJ

Posted by Anonymous on

6 Suggested Answers

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  • 2 Answers

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Posted on Jan 02, 2017

  • 104 Answers

SOURCE: coleman powermate inflationmate pump

The ring is gone on compressor. You can buy replacement pistons and rings from colemen. Comes with instructions.Good luck

Posted on Oct 26, 2008

  • 1383 Answers

SOURCE: Air compressor w/5hp motor

Assuming that the motor is factory matched to pump, it should be powerful enough to turn the pump. Most problems with motors are related to pressure switch and/or capacitor. The pressure switch could have burned contacts causing low amps to reach the motor. The capacitor should test at least 90% of rated value printed on capacitor. Some volt meters have capacitor check setting. Also this motor at 5 hp must draw lots of amps. The outlet should be rated at least 20 amps and plug the compressor directly into oulet without an extension cord. \
Secondary problem is the in-tank check valve. The check valve should hold in tank pressure without leaking back to the head of the pump. If check valve leaks, replace it with any brand of same thread size. enjoy

Posted on Nov 29, 2008

  • 3 Answers

SOURCE: Campbell Hausfeld compresser throwing breaker

There is a one way valve that only lets air from compressor to tank. If this isn't working the motor is trying to start under the pressure of the tank, and therefore tripping your breaker.

Posted on Nov 30, 2008

  • 140 Answers

SOURCE: 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.

Posted on Dec 30, 2008

mrhappyface
  • 205 Answers

SOURCE: air compressor fills, but slows down as the pressure builds

sounds like you need a new check valve which should be somewhere between the compressor outlet piping,tubing,etc and the tank which prevents the air in tank to back feed to the compressor which would cause hard starting and could damage the motor easy way to check is when you shut off the compressor with some air in the tank if the check valve is bad it would continue to bleed air out out the unloader valve .the unloader valve on your unit is most likely part of the pressure switch when the unit shuts of it should only bleed down the pressure in the pump so it would make it easy to start when needed hope i didn't confuse you

Posted on Mar 23, 2009

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1 Answer

Rebuilt piston compressor works fine but only reach 35 pounds seems like tank won't fill motor slows down belt smokes if I disconnect pipe and valve from tanks it runs fine with out issues also ran and...


check for a faulty check valve at the tank inlet end of the pipe
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This would account for a piston lockup ( over pressure) causing the belts to slip but to work ok when the pipe is removed

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I have a CH HJ 300200 that will not build pressure, there seems to be pressure building in the tank but the Pressure gauge does not move. I removed the pressure line going to the tank, it gets hot and...


Bill:

I would remove the pressure gauge and check the bottom of the air gauge fitting. The small hole at the bottom of the gauge fitting may be clogged. Sometimes when the pressure gauge is installed a piece of Teflon tape (used to seal the threads) can get lodged over the pressure gauge air port.

Jan 24, 2015 | Campbell Hausfeld Air Tools & Compressors

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My Craftsman air compressor has wored fine till now. It does not want to build up pressure beyond 50 psi.yes I did check the drain valve and no leaks. Motor seems to be putting out the rpm's and the oil...


Check for a leak between you compressor head (pump) and your tank. Your pump output may be good but as your tank pressure gets higher the leak will not allow the tank to build up.

Feb 04, 2011 | Craftsman 1 hp Air Compressor, 4 gal. -...

1 Answer

Pressure in the tank only builds to 30 psi


Bad check valve. But I would check the regulator, by turning it down to about 10 PSI and running it and see if it builds again, if that works then it is the check valve. But from what you are saying I would replace the check valve anyways.

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Chicago forge horizontal air compressor will not build


Here are some simple tests that will help solve your problem. Check for leaks with soapy water on all the joints and the drain valve. With compressor running and it has reached all the pressure it can muster, remove the air filter and place your finger over the intake port, you should feel good suction and the compressor should speed-up if pump is working and pressure is leaking out. If you feel good suction then pressure could be leaking past cylinder/ring if it is oilless. Check upper part of cylinder for scratches or torn vinyl ring. If you do not feel suction, but rather air blowing out of intake then you may have bad reed vales or torn gasket in head. Another simple test is to run compressor for a few minutes and disconnect power then listen for air leaks at the pressure switch unloader valve. If leaking replace the in-tank check valve (brass valve). Follow the discharge airline to the tank, there you will find the checkvalve. Good Luck and email if you have questions.

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1 Answer

Intermittent pressure building


The check valve is easy to test. All that you have to do is run the compressor till you have some pressure in the tank, 50 ~ 60 lbs will do, then remove the air discharge tube at the check valve installed in the tank (the brass valve). Spray soapy water into the valve. Tiny leak is ok, rapid leak replace valve with generic valve from www.grainger.com . Most likely problem is worn cylinder or reed valves in the head. To check cylinder, unplug unit and (oilfree compressor) remove cover to expose the crank. Push the piston all the way up and check for scratches on the upper part of cylinder. If scratched, replace with kit# K-0650 available at www.toolpartsdirect.com. If cylinder is smooth all the way up then problem should be the reedvalve plate in the head. The reeds could be held open with debris or broken. Clean or replace as needed. Good Luck and email if you have questions about the repair. (Oil in crankcase type compressor will not have cylinder problems)

Feb 25, 2009 | Porter Cable Air Tools & Compressors

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,...

3 Answers

Campbell Hausfeld compresser throwing breaker


There is a one way valve that only lets air from compressor to tank. If this isn't working the motor is trying to start under the pressure of the tank, and therefore tripping your breaker.

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