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On a Sears Craftsman 20 gal air compressor model # 921.166430 I need the start up capacitor. Where can I get one?

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Capacitors are generic components. They are not made for a specific compressor, like a mechanical part. You need the voltage rating and the capacitance. The capacitance will be a number like 5uF or 10uF (uF = microfarads). Then you can go to an electronic supplier that handles small orders, like Digikey, and get a replacement. I have seen them on Amazon as well. I got mine on ebay. Just make sure it will meet or exceed the AC voltage rating. Some capacitors are made to only handle DC, like electrolytic capacitors. They have a + & - marking. These will explode if you try to use them. On the replacement, you can exceed the voltage rating, but the capacitance needs to match pretty closely since it is tuned to the motor's starter winding to create the correct phase shift to start. If the phase shift is off too much, you won't have enough torque to start up.

Posted on Dec 10, 2013

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Posted on Jan 02, 2017

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SOURCE: Sears Craftsman 3-Gallon, 1.5 HP Air Compressor Hums

YES IT MAY BE THE CAPACITOR . IT COULD ALSO BE THE WIREING IN THE MTR, THE PUNP ITSELF.

Posted on Nov 26, 2008

  • 1388 Answers

SOURCE: Oil capacity for craftsman air compressor circa 1978 model #106..

I have a 2hp craftsman air compessor with a two cylinder pump, Here is the info from my manual as far as oil capacitity:

Remove oil fill plug and slowly add
a compressor oil until it is even with the
top of the oil fill hole. NOTE: Do not
allow oil to be lower than 3/8"
from the top at any time. When filling
the crankcase, the oil flows very slowly
into the pump. If the oil is added too
quickly, it will overflow and appear to
be full. NOTE: Crankcase oil capacity is
approximately 16 fluid ounces.

I buy my compessor oil from Lowes in the tool department. It comes in 16oz and sells for about $3. I wouldnt worry about how many ounces it holds but rather that the oil level is to top of filler hole. Lowes also sells a synthetic oil for about $7 and is recommended for severe conditions (hot / cold / used all day). Good Luck!

Posted on Apr 26, 2009

  • 4 Answers

SOURCE: craftsman 3 gal air compressor - no air presssure

Check the head gasket. Mine just did the same thing. Mine was blown between the two chambers on top. It's very thin right there. I went to the auto parts store and bought some gasket and made my own for about $6. It's up a working great...finally. BTW the gasket kit is on back order right now at Sear's parts website. It appears we aren't the only ones with the problem!

Posted on Jul 19, 2010

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I have a 20 gal. 2 hp, twin cyl., model # 106.154781. What type oil does it take and I need air filters and a new drive belt.


Most aircompressors these days take non detergent 30 like an hd 30 gear oil , call sears they will have filters and belt

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Since the exact model number manual is not available go to Sears and look at the compressors they have on the floor (or in the catalog). Find one that looks like the one you have and note the model number (these devices haven't changed much over the years). order the manual for the one that matches your machine the best.

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Compressor starts innitially,then when pressure gets low it trips breaker when it tries to start back up.20 amp breaker to light switch to compressor is about 2o ft on12-2 wire. tried 30 amp breaker,does...


the start capacitor on the motor body is weak,the motor needs this component to over come the air pressure when cycling to re-build the low air pressure,change both the start and run capacitors when doing the start because the other run capacitor is just as old and it will soon fail

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Craftsman 30 gal compresser trips circuit breaker


That number does not come up on Sears parts direct, how ever a start capacitor you can have tested at any motor repair shop and likely get one to replace it from them as well,,,and can almost guarantee it will be cheaper than from sears anyway.

Feb 25, 2010 | Craftsman Air Tools & Compressors

1 Answer

Sometimes starts. but doesn't always run at full power. I think it's the run capacitor


I don't know how old you compressor is but (and please don't take this personally) it's a piece of junk. That said I must give sear's kudos because It is an incredibly successful one. They are made to use and throw away.

These things are everywhere.

The one redeeming value seems to be parts availability.
I don't know the exact model of your compressor but click the link and check the part numbers available. It may not even be an exact match. If it's close check it and click the links to the images on the page. More then likely any parts you need will fit several models.

Hope this helps. Let me know if you have any trouble locating your model and respond back with those number and I'll find what you need.





http://www.mastertoolrepair.com/craftsman-sears-parts-sears-craftsman-portable-c-271_535_537.html?osCsid=40ae0a9cfa2473e7c4367c423e929d42

Jan 05, 2010 | Craftsman 3 gal. Air Compressor, 1.5 hp,...

3 Answers

Sears craftsman 3 gal/1.5 hp air compressor won't run


are you using an extension cord? if so, plug the compressor into a wall socket, if it fires up fine then your extension cord is too long or not heavy enough - other problems could be a bad start capacitor, a loose connection in the pressure switch, or a bad switch

Aug 15, 2009 | Craftsman 3 gal. Air Compressor, 1.5 hp,...

1 Answer

Pressure regulator gauge wont work on my 3 gal. air compressor how do i fix it or where do i get a new one (craftsman) i also lost my book , how often do i change the oil ?


If the regulator is inline you need de-energize the compressor to remove the regulator.

Sears parts and service:

http://www.sears.com/shc/s/c_10153_12605_Home+Services_Repair+%26+Maintenance?adCell=W4

Compressor Information:

http://www.sears.com/shc/s/c_10153_12605_Tools_Compressors+%26+Air+Tools

Wiki Buying Guide for Craftsman Regulators:

http://www.shopwiki.com/search/Craftsman+Regulator+with+Gauge

Sears / Craftsman Forum & Repair Information:

http://www.sears.com/shc/s/nb_10153_12605_NB_CSHome

3rd Party Regulator Retailer:

http://www.controlair.com/


If you feel that your problem is too serious for you to repairyourself, please contact a licensed/certified technician.
If you wish,you can call Sears HomeCentral at 1-800-4-MY-HOME tomake an appointment for a technician to visit. (There is a charge forthis service.)

Mar 11, 2009 | Craftsman 3 gal. Air Compressor, 1.5 hp,...

1 Answer

Compessor will start and fill tank initally .


Yes it would be a start cpacitor and yes you can still order the part from sears

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2 Answers

Sears Craftsman 3-Gallon, 1.5 HP Air Compressor Hums


YES IT MAY BE THE CAPACITOR . IT COULD ALSO BE THE WIREING IN THE MTR, THE PUNP ITSELF.

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