Model #919165120 CRAFTSMAN Air compressor

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Question and Answers

Q:

Replacement capacitor for Air Compressor 919.165120

A:

Thanks for the inquiry and for being a valued member.

The capacitors on this motor are not being broken down for purchase. In this case, you will want to take the capacitors to a local electrical supply house. They will usually test the capacitors free of charge and help you match up replacements. 

I hope this helps and thanks for using SearsPartsDirect.com. We appreciate your business. 

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Jeff Wallace Sr -
Sears Technician
April 06, 2015
Q:

I have air comoressor Model 919.165120 and the trouble is the pressure will not go above 60 lbs. I have checked the regulater and it seems ok. 919.165120

A:

I know that it can be very inconvenient for you not to have your air compressor working properly. While you are waiting for an expert to respond I was able to locate some information that could possibly assist you with your issue. I have added the link below. Hope this helps!

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Yadira B -
December 15, 2012
A:

Thank you for your question.

I am sorry you are having a problem with the air compressor. If the unit is not building pressure like it should, the air compressor probably has something broken inside the cylinder. Before you take the compressor apart, listen and feel for air leaks. Check to see if air is coming back out of the intake filter. If air is coming back out of the intake filter, the tank check valve is the problem. If you feel air coming out of the intake when it is running I suspect the valve plate is broken.

Also check the tubing connections to the pump. If the connections are fine, you have to remove the head. The head is secured with four bolts. Directly under the head is the pressure plate. The pressure plate has reeds on it that direct the air into the discharge line and keep the air from going back into the cylinder of the compressor. Check the reeds for warping or breaking. If the reeds are damaged, you must replace the pressure plate. Make note of how the pressure and seal sit on top of the cylinder.

If the pressure plate looks fine, I recommend setting it aside and inspect the piston and the cylinder. What usually happens is the piston ring wears and allows air to blow past the piston. When this happen the compressor will run longer and may never come up to full pressure. To repair this problem I recommend replacing the piston ring and the cylinder. Most compressors have a kit available that contains the piston, ring, cylinder, and the seals.

Please feel free to reply with more details if you need further assistance on the repair of the compressor.

Here is a link to order any parts you need. Sears Parts Direct .

If you do not feel confident repairing this problem yourself, then you can have it repaired at your home by a Sears technician. Here is a link for the website: Sears Home Services .

Thank you for using Manage my life.

Mark T.

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Mark T -
Sears Technician
December 17, 2012
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Q:

Compressor kicking out circuit breaker at startup.

A:

I see the air compressor has put a hold on getting some projects done while you search for an answer to fix it. I checked the archives and found a similar question for the same model. Your detailed explanation may help the expert provide a better answer but if you wish to check that post I attached below.

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Barbara H. -
July 31, 2011
A:

Thank you for your question on the air compressor tripping the circuit breaker.

If the unit will start with an empty tank it points to a problem with the un-loader valve on the side of the pressure switch.

If you do not hear a whoosh sound for a couple of seconds after the compressor reaches its pressure goal and shuts then it will not unload the pressurized air in the head so it can restart when needed.

The small unloader tube goes to the side of the check valve on the tank and if it fails to close it can cause the tank pressure to feed back into the head and make it difficult for the motor to start the compressor.

If could be one or both of these components but I would bet on the pressure switch if you do not hear the air leaking sound for a few seconds when the air compressor shuts off.

If you need more help please let me know what you have found, and we can continue our troubleshooting based on that information.

Thank you for using Manage My Life.

Sam A.

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Sam A -
Sears Technician
August 02, 2011
A:

I replaced the pressure switch. No luck.

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dan -
August 05, 2011
A:

Thank you for the update on the compressor. I am sorry that the pressure switch did not fix the problem. When the air compressor starts with an empty tank and shuts off do you hear the whoosh of for a few seconds. Because if you do not the relief part of the check valve to the pressure switch is not working. The unloader on the pressure switch has to open that line to the atmosphere to relief the head pressure so the compressor can restart. You said you had checked the check valve and it seemed to be working however seeing as the pressure switch did not repair the problem either the check valve is bad or the electrical circuit is not heavy enough to hold the start up amps on the motor or the motor is failing. There is one other thing you could check and that is the start capacitor on the motor. Since you said you have a meter set if the ohms RX1 scale and discharge the capacitor (by using a metal shank screw driver across the capacitor terminals) and remove the start capacitor and check it for continuity switching the leads on the cap. Put you meter leads on the two terminals and you should see deflection or a reading and then it should bleed down to zero. Then reverse the meter leads and do again with the same results. It the start capacitor does not check out to be good it will have to be replaced. Usually the motor will not start at all if the capacitor is bad. Please let be know what you have found so far and let me know so we can continue with the troubleshooting. Sam A.

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Sam A -
Sears Technician
August 06, 2011
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