Question about Craftsman Air Tools & Compressors

4 Answers

I have a VERY OLD Craftsman Air Compressor. I believe it is a 20 gallon 220 volt 2 hp. electric motor. The model number on the side of the compressor (2pistons) unit is 265-104. I don't have any problems with it so this should be an easy question for you. It works very well and holds 120 PSI for weeks without a leak. My question is what is the proper oil capacity for this unit?

Posted by on


4 Answers

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points


    An expert that got 10 achievements.


    An expert that got 5 achievements.

    Vice President:

    An expert whose answer got voted for 100 times.

  • Craftsman Master
  • 885 Answers

I've been working on air compressors for a while now and so far haven't found any that give a specific amount of oil to put in the air pump crank case. They all have one of two methods to get the oil to the proper level. First, and my favorite, is a sight glass at the bottom of the crank case. About the size of a quarter, it lets you see how much oil is in the pump as you add it. Usually they have a red center dot which is where you want the oil level. A little over or under is OK but the sight glass should not be completely full or completely empty, both are hard on the pump and drive motor. Another method is a dip stick usually on the end of the fill hole cap. Only bad thing about these is you have to put in some oil, check the oil level with the dip stick, then add more oil and check it with the dip stick until you get to the full mark. Again, not over and only a little under is where you want the oil level.

Posted on Mar 18, 2011

  • byrnes0923 Mar 22, 2011

    Positivly, 12oz. I have the same PNm265104 and the drain/fill plugs limits fluid level to 12oz. I flushed mine 3 times and drained each time in a measuring cup. 12oz consistant!

  • David Dennis Jun 11, 2012

    Thank You (very belated) as my computer was down for some time. Unfortunately someone in a flash of brilliance replaced the sight glass with a freeze plug. I bought it used, it seems very happy with one quart. I do wonder if I could get a sight glass for it?


  • Level 1:

    An expert who has achieved level 1.

  • Contributor
  • 1 Answer

Drain and then pour 16 FL Ounces of non-detergent SAE-20 oil into the crankcase. Compressor oil from your hardware store is usually fine, but try to find a synthetic, it will last for years before needing changed. DO NOT USE ANY DETERGENT OIL IN THIS PUMP, IT WILL EVENTUALLY RUIN IT!!!

That is an awesome old pump you have there and parts are unbelievably still available for it. Take care of it, keep the filter clean and it will easily last another 25+ years! Most that usually happens with that pump is the reed valves may need changed.

Posted on May 02, 2015

  • Dave Magana
    Dave Magana Jul 20, 2018

    I bought mine and oil was gray and nasty drained air tank had oil and moisture in it changed oil but seems like still oil in it is that cause of rings or reed ?


  • Level 1:

    An expert who has achieved level 1.

    New Friend:

    An expert that has 1 follower.

  • Contributor
  • 1 Answer

Do you know what the model number is for your compressor?

Posted on Dec 11, 2014

Testimonial: "265-104"

  • Level 1:

    An expert who has achieved level 1.

    New Friend:

    An expert that has 1 follower.

  • Contributor
  • 1 Answer

I have same pump but mine has 5hp motor I have moisture and oil in air tank oil was grey when I bought it so I changed it but seems like still have oil getting in tank gets to max pressure pretty fast no noises what should I do ? Replace piston rings or reed valve

Posted on Jul 20, 2018

1 Suggested Answer


6ya staff

  • 2 Answers


Hi there,
Save hours of searching online or wasting money on unnecessary repairs by talking to a 6YA Expert who can help you resolve this issue over the phone in a minute or two.

Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.

Here's a link to this great service

Good luck!

Posted on Jan 02, 2017

Add Your Answer

Uploading: 0%


Complete. Click "Add" to insert your video. Add



Related Questions:

1 Answer

I have a Sears 2 HP 20 gallon air compressor, model number 106.170641, currently wired for 220. Can it be converted to 110 ?

it is a 5 hp motor and 15 amps 230 , rewiring it would require 120 vac breaker rated at 60 amps. The power would have to upgraded to #10 AW there is is no receptacle available, so the answered is no. . the the answer upgrade to 220 Vac

Aug 20, 2018 | HP Air Tools & Compressors

5 Answers

I just bought a craftsman pneumatic 1/2-in drive impact wrench. And used it with my craftsman 4-gallon 1hp air compressor tried to loosen the bolts on my car wheel wouldn't loosen them help

Pneumatic tools are rated in cfm (cubic feet per minute). Your 1 HP air compressor is rated at probably not more than 3 cfm while the 1/2 " impact driver needs at least 8 cfm, maybe 12 chm of air.
The compressor must provide more chm than tool rating needs.
It is a problem, by the time you look at five horse power air compressors and larger, a lot of electric power is needed. A circuit of 220 volts, 20, 30, or more amps would be required to run those large expensive compressors.
If you can, return the air tool and get a good electric tool instead.
Leave those high air volume air tools to shops that are so equipped to use, or invest if you must.

Jul 24, 2017 | Craftsman Air Tools & Compressors

1 Answer

What type oil for model 90234 4 HP 10 gallon

The model number is not enough info but assuming it's a run of the mill, Home Depot or Craftsman type electric air compressor, you need to buy compressor pump oil at Wal Mart or an auto parts store. Please don't use Automotive motor oil because that's not going to withstand the heat of your compressor pump and you'll be buying a new compressor because of it. If your compressor has a gasoline, 4 Hp. motor, it needs Mobil 1 synthetic and change it after every 30 hours of operation.

May 19, 2017 | HP Air Tools & Compressors

3 Answers

I have a 5 hp compressor. It will turn on and run maybe 5 seconds and then kicks my breaker out.

you could have a weak breaker or the breaker is not rated for the draw of the compressor have a pro check it out

Mar 02, 2015 | Campbell Hausfeld WL6502 5-Hp 20-gallon...

1 Answer

Have an old (1977) Sears 2 hp, 20 gallon air compressor. It is wired for 230 volts. Is it possible to rewire it for 115 volts ?

you'd have to change the voltage regulator, which is usually inside the motor - on newer motors, if they have a separate Power Supply, you can sometimes change it on a slide switch... keep in mind, that 230 is MUCH more effective for a device made for drawing a lot of power - that motor might draw 8-10 amps at 220, which will be 2x that if you go to 110... so, when all is said and done, it might work out cheaper to just spend like $200 and buy a new 110 unit that is similar... but again, depends what you want to use it for...

Sep 13, 2014 | Air Tools & Compressors

1 Answer

I want to convert my compressor from 115 V to 220volt? There is nothing in the owners manual on how to do this. Can you help me?

Your garage mate unit was made to operate on 120 volts. That one reason there is nothing in the owners manual. To convert it my be costly.First your electric motor must be able to handle 220 volts. you will need to look on the motor tag and see if it has 120v/230v. if not you will have to purchase a new motor that will handle 220/230 volts.If your motor will handle 220/230/volts you need to look at the the wiring diagram attached to the motor. you then will need to purchase a 220 v plug and outlet and correct wire size to install.

Jun 21, 2011 | Ingersoll Rand - Rand 2 - hp 24 - gallon...

2 Answers

IR 2475E Wont start up 220 everywhere No LOP switch

did you check for a motor reset button on the motor??

Feb 20, 2010 | Ingersoll Rand - Rand Type - 30...

2 Answers

My air compressor starts fine but dies about 2 mins after starting ?

An 8 hp motor? Is that 220 volt, 440 volt,?? Is the motor getting hot? That would pull quite a few amps on 220, you need to check your wiring to see if it's big enough, I would guess you would need 8 gauge or bigger---check with an electrician.

Apr 27, 2009 | Honda Quincy 17 - Gallon Air Compressor...

1 Answer

Converting from 220 to 110 volts

Most brands of air comperssors are built to work on either 220 or 110 v. I believe that 220 v compressors are more efficient and draw less current and run cooler.
The more expensive compressors have a switch allowing for voltage selection. Still others will have a wiring diagram printed on the motor allowing voltage change by changing jumpers. Most all of the sears compressors that I have repaired were of single voltage with no other way to change except change motor. Do not worry however, you have the better motor. It is easier to convert the outlet plug to 220 by isolating the circuit and installing a 220 v breaker. enjoy

Nov 15, 2008 | Craftsman 3 gal. Air Compressor, 1.5 hp,...

Not finding what you are looking for?
Air Tools & Compressors Logo

Related Topics:

1,758 people viewed this question

Ask a Question

Usually answered in minutes!

Top Craftsman Air Tools & Compressors Experts

John Trevino

Level 3 Expert

1420 Answers


Level 3 Expert

2595 Answers

Joe Garcia
Joe Garcia

Level 2 Expert

207 Answers

Are you a Craftsman Air Tool and Compressor Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides