Model #921153100 CRAFTSMAN Air compressor

  • Air Compressor
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Question and Answers

Q:

tuning on compressor only get a huming sound 921153100 Craftsman Air compressor

A:

Thanks for the inquiry and for being a valued member.

I am sorry to hear of the issue you're having with starting the compressor. I know how frustrating that is.

The issue will likely be with the start capacitor on the motor (part E100248). However, it could also be with the motor itself. I would recommend taking the motor with capacitors to a local electrical supply to have them properly discharged and tested. That is usually a service they will perform free of charge. The motor is not available for the unit, so if the motor needs replacement, you will need to match one up. 

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

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Jeff Wallace Sr -
Sears Technician
March 31, 2015
Q:

My 921153100 CRAFTSMAN Air compressor will not build up pressure. 921153100 Craftsman Air compressor

A:

Thank You for choosing Sears PartsDirect.com and being a valued member. It is unfortunate to hear that you are having issues with your air compressor and I do understand your frustration. Glad to help out. I'm looking at your model number 921153100 and the problem could very well be the reeds. Start the compressor up and hold your hand just over the air intake and see if you feel air blowing from the intake onto your hand. If you feel air blowing out of the intake then the reeds are bad. If you do not feel air coming from the intake and everything has been checked then it's mostly likely the piston ring on the pump. If the tank is sealed, and not leaking from a drain bolt or seam, then there may be a problem with the pump unit itself. 


Worn piston and ring assemblies or valve plates can make it difficult for the pump to build the proper pressure and some models use a belt to drive the pump so any slipping there could also be a factor. 

A completely failed part would prevent any pressure building at all, but a sticking check valve or poor sealing pump components might still allow the pump to build pressure to a certain point. Once the pressure reached a certain level it could overcome the seal on the components and prevent them from building more pressure. The result would be partial pressure built-up in the tank. Here is a link that may help with some additional troubleshooting. Just click the blue link above to be taken to the page. I trust this information will help you.

 

Thank you for choosing Sears PartsDirect.com.

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Sherman_G_Wallace -
Sears Technician
January 27, 2015
A:

Sherman Thank you. I am going to replace the reeds and the oil fill cap. Marty

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MJBarron -
February 02, 2015
A:

Sherman Changed the reeds and the oil filler cap with no luck. I removed the protective cover an it seems like the air leak is coming from the induction motor which does not make sense. I could not found any holes. Do you know if I can repair the whole piston assembly? Marty

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MJBarron -
February 11, 2015
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Q:

Air Filter Installation 921153100 Craftsman Air compressor

A:

Thank you for choosing sears I would be happy to help you with your air compressor. Upon researching model 921153100; the filter does not have a threaded side but there is a knob that goes thru the hole on filter and it threads into the rest of the unit securing the filter in place. I have posted a link below of the knob that secures the filter.

I trust this information will help you, have a great day.

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CarlosZ -
Sears Technician
January 16, 2015

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