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Posted on Dec 21, 2009
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60 gal farm hand air compressor starts, builds up pressure, but won't restart when pressure drops. After cool restarts.

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Ben crisostomo

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Your automatic switch is not activating just replace switch or clean contact.

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My farmhand will shoot one nail then want have enough pressure shoot the next nail what could cause this

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  • Posted on Dec 21, 2009
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Bad regulator or safety valve will often cause this. when pressurizing up, a small switch is pressed by the air in the tank pushing on a small piston, this is a safety feature and may need to be replaced. might wanna get it serviced. the unloaded valve will open when the air in the tank reach the set amount. http://www.ag.ndsu.edu/pubs/ageng/machine/ae73-07.gif


A Miller

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  • Posted on Dec 21, 2009
A Miller
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Your pressure switch may be malfunctioning or the start capacitor may be starting to fail.

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Related Questions:

0helpful
1answer

Air compressor will not restart after it builds pressure and pressure drops to 80 psi

Make sure the power cord is plugged into an adequate extension cord if one must be used. Never less than 12 gauge wire.

The start/run capacitor may need to be replaced.. If there are any ball check type valves, make sure they are not worn or sticking. they would be on the output of the compressor head itself.
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My four-year old PC pancake compressor starts fine but only builds up 60 psi no matter how I adjust the pressure regulator. The compressor motor runs continuously. I checked for air leaks and can't find...

First take off the head on the air pump and check the reed valves on the valve plate. If they got hot and warped or cracked they'll work to a point then no more pressure can be built up. Next check the pistion ring and cylinder wall. If either is damaged you'll only get so much pressure build-up then it will leak past the piston.
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Compressor runs to 175psi but trips pressure relief when pressure drops tries to restart motor but motor wont turn blows breaker. changed whole pressure switch have same problem.

The problem is lilkely the check valve between the compressor and the tank -- it is alowing pressure to build from tank to compressor preventing the compressor from turning over. Clean, maybe replace, check valve...

Charlie
0helpful
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I have a sears craftsman air compressor. It runs fine until it builds gets up to the max air pressure. It shuts off then as it should but as I use it and the air drops and it tries to restart, it barley...

Something may be wrong with the 'unloader' function in the air pressure control--it should drain air pressure within the exhaust tube from the compressor. You may also be running the unit on too small wiring (extension cord) and it is starving for power when the heavy load restart occurs. Hope this helps!
Aug 16, 2010 • Garden
0helpful
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Have a husky 19 gal 1.5hp it kicks on when first start to work and when it builds up air and i use it and when it wants to kick back on it wont i have to wait till it cools down.

Is there an option for you to run this compressor on 220 volts vs 110 volts??? If so, you may want to convert it by following the re-wire instructions on the motor or wire access plate/instuction book. The reason your compressor won't fire up again after building pressure is the head pressure is to great at restart and 110 household current is not enough to give the power needed to turn the piston. You'll need to replace the plug and have someone run a 220 volt circuit once the conversion is completed.
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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.
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Ec12 hard restart after drop in air pressure

It sounds like the air pressure assembly unit is not reading the pressure drop. some of these units have adjustments under the covers and be reset.
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