Question about Campbell Hausfeld 20 - Gallon Air Compressor

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Electric motor stalls

Why would the electric motor slow down and eventually stall out at 70 psi on a oil bath 120psi compressor?

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A compressor can stall before completing a cycle if the motor is not receiving correct power, such as when there is an extension cord being used or outlet is overloaded with other appliances. Other problems that cause this condition are in-tank check valve is leaking pressure back to the pump and weak or failed capacitor. Some volt meters have setting for checking caps. Reject the capacitor if reading is 90% of rated value. Rare problems include worn bearing or bad contacts on pressure switch. enjoy

Posted on Nov 29, 2008

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My sears air compressor model 919.156781 will not pump up past 40 psi , then motor then compressor stalls and motor gets hot , have to unplug . I have had the motor checked


When it gets to 40 psi turn it off and see if you hear air leaking down from somewhere....if so listen and feel around the edges of the compressor head. If you hear or feel air leaking there you may need to replace a head gasket.

Jun 13, 2014 | Craftsman 20 Gallon Portable Horizontal...

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Air compressor slow to build pressure, and noisy.


All large air compressors are very noisy.

How long it takes to come up to pressure depends on the size of the compressor piston(s), how fast they are running and the size of the air tank attached to it. (and if the tank or hoses have leaks)
A 20 gallon tank could easily take 10 minutes to get all the way up to 120 psi. 120 is very high, and probably the limit for the compressor. Depending on what you're using it for, try dropping the setting to say 80-90psi.

Sep 25, 2012 | Air & Gas Compressors

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My craftsman air compressor #919176820 2 HP 12 gallon 200 max psi will not compress over 125 psi


If your compressor is oil-less type, most likely pressure is leaking past piston ring. To verify, remove cover to expose bottom of cylinder (unplug compressor and let out all air). With flashlight, examine the upper-most part of the cylinder (turn motor by hand till piston is at top of stroke). If top of cylinder is scratched, then pressure is leaking past.
For many years now, stores are in a race to have more HP and PSI to attract customers. Customer is really the loser because components used to make the units can not handle the higher pressure. Normally small 115v compressors are set to cut out at 125psi and larger two stage units will cut out at 160psi. Small compressor set to 200psi makes for short lived compressor. Could be compared to driving your car at 100mph all day every day. Longest life is attained when unit is being used at about 60 to 75 % of capacity.
To allow your compressor to reach cutout pressure and keep working for a while, lower cutout to 120psi (pressure switch may be adjustable). To restore to 200psi, replace cylinder/ ring.
If your compressor is oil type, suspect leaking reed valves.

Nov 27, 2011 | Ingersoll Air & Gas Compressors

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What will cause my compressor to start bogging down and trip the electric motor after reaching 30 to 40 psi? it has fresh oil and air filter. The electric motor also checked out ok.


It sounds like the run capacitor needs to be replaced. If yours is weak or defective the motors run windings will over heat and trip the overload. You can find replacements at "Drillspot". Another issue is using an extension cord that cannot handle the load.

Don F

Aug 24, 2011 | Ingersoll Rand - Rand Type - 30...

1 Answer

My compressor bogs out to the point it will stall the motor and blow a fuse. it happens on the third cycle at about 110 to 125 psi


change the run capacitor on the motor,its getting weak,there may also be another capacitor for the start circuit,replace them both

Mar 05, 2011 | Ingersoll Rand SS5L5 Ir Electric...

1 Answer

Dewalt air compressor keeps running until pressure output is 200 PSI, the same pressure in the tank. Why doesn't it quit running at 120 PSI the designated pressure on the compressor?


The regulator switch/unloader is bad or out of adjustment. Perhaps though the gauge is faulty. 200 psi in a 120psi compressor is dangerous, don't run it until it is fixed!

Dec 15, 2010 | Dewalt Air & Gas Compressors

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I have a 5 HP Coleman air compressor. I was using it to provide air to my plasma cutter which requires 60 psi to operate. Basically, air compressor's motor keeps running, but it's stopped creating air...


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

Sep 24, 2010 | Coleman Air & Gas Compressors

1 Answer

Compressor runs for a bit and builds about 30 psi


Remove the belt and try and turn the pump by hand if it turns free then you have a bad motor and it will need to be replaced

Apr 20, 2010 | Craftsman 3 gal. Air Compressor, 1.5 hp,...

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Hello; could you please help me to find the answer for this question; 1) what exactly is the surge, and what is the difference between surge and stall? please explain in a simple language because i have...


Stall is the state the armature is in just at startup. Your compressor will draw maximum power at stall. Some say there is a small surge some nano-seconds after the compressor gets rolling ... just as it begins to slow to operating speed.

A electric surge is a temporary increase in line voltage doe to any of a hundred reasons. There is a surge in your home everytime a motor starts. Lightening strike.

Have I properly addressed your question? or have I missed the boat.

Can I recommend Wikiedia for additional reading?

Thanks

Oct 19, 2009 | Air & Gas Compressors

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