Model #919175260 CRAFTSMAN Air compressor

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Question and Answers

Q:

What pressure should the pressure switch cut-off shut down my compressor? 919175260

A:

Thanks for the inquiry and for being a valued member.

Based upon the specifications I see for this compressor, the approximate cut-in pressure is 100 PSIG, and the approximate cut-out pressure of 125 PSIG. Because they are approximates, the actual may be a little more or a little less. I wouldn't allow the pressure to go much above 125. I think 130 would be pushing the limit.

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

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Jeff Wallace Sr -
Sears Technician
July 23, 2015
A:

That's very helpful indeed thank you! Now that begs the question, seeing as I just replaced the compressor section only and that the switch was working prior to that, what could possibly be wrong with the switch? Is that an adjustable cut-out / cut-in switch? I looked at it visually and there isn't any damage to it. I guess I could pull it off and test it on a calibrated pressure source (Druck) I see that the switch part is not available on the website... is there a direct replacement for this or am I going to be left to try and match one up on my own?

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Jon -
July 23, 2015
A:

Well while im at it.. maybe you can answer another question for me.. If you look at the compressor head, it has two fittings., one is a 3/4 NPT to a 3/4" compression fitting that goes directly to the tank. The other fitting is an 1/8 NPT elbow to 1/4" Compression fitting. The 1/4" line then goes from the compressor head over to the pressure switch and ends there but does not seem to be connected in any way other than a bracket that holds it there in place. What is the function of that line. It seems to terminate with a plug on the end by the switch.. at first i thought this was some sort of sensing line for pressure but i think the 1/4 NPT fitting on the bottom of the cut-out switch itself is plumbed in to tank pressure through the manifold. Not really sure what this line does... can you tell what it does?

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Jon -
July 23, 2015
A:

Nevermind... I figured it out. The tube was attached to the unloader valve.

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Jon -
August 18, 2015
A:

Nevermind... I figured it out. The tube was attached to the unloader valve.

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Jon -
August 18, 2015
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Q:

My air compressor model 919.175260, piston rings do not go up or down? Whats the torque specs on the connecting rod cap bolts and head?

A:

I am sending you an image that gives all the torque specs for the compressor. I hope this helps.

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Jimmy K -
Sears Technician
April 19, 2010
A:

Hi Jimmy, Can you please send me the image with all of the torque spec. for the same compressor? The image is so small I cannot read it even after I zoom in, it just gets blurry. I just replaced the craftsman motor with a 5hp 220 WEG motor and now I going to rebuild the air pump. New rings, flapper valves and anything else you think I will need to rebuild the air pump. Many thanks, Jay

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Jay -
March 17, 2015
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Q:

Head gasket keeps failing 919175260 Craftsman Air compressor

A:

Thanks for the inquiry and for being a valued member.

There are a few things that can cause the head gasket to constantly fail on a compressor. I will cover these below.

The primary thing to check is the check valve. The little holes on the check valve (hidden by the brass) can get clogged. I would try disassembling the check valve and cleaning it thoroughly, it very well may solve the issue. 

Another factor would be if the valve plate or head itself warped. You would need to check both of those components for flatness if inspecting and cleaning the check valve doesn't solve the issue. 

I suspect that your issue will be with one of the above issues. I hope this helps and thanks for using SearsPartsDirect.com. We appreciate your business. 

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Jeff Wallace Sr -
Sears Technician
November 16, 2014
A:

thank you for answering my question, I will try that next. Do you know what the head studs torque should be?

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Jacob -
November 16, 2014
A:

The head bolts should be tightened to 75 ft/lbs. on this model. The torque sequence should be done in 2 steps. Step 1 should be about 35-40 foot pounds and then the final step is up to the 75 foot pounds requirement.

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Jeff Wallace Sr -
Sears Technician
November 16, 2014
A:

That is where my issue is most likely. I read 10 ft-lbs. That's a big differeance. Thanks for your help.

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Jacob -
November 17, 2014
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