Sourcing Air Compressor Piston Ring

[carbureted iron]

To others of the "repair before replace" mindset...

My stalwart, decades-old Craftsman 919167240 air compressor will not build pressure above 90psi. Disassembly and investigation reveals a slightly worn piston ring, while the piston head and cylinder sleeve are immaculate.

I cannot find a part number for the piston ring, and so I cannot a compatible replacement. The thing is 30mm ID, 47.5mm OD, 4mm lip, and fits within a 48mm bore cylinder sleeve. If you've replaced in the past this component in your aged but otherwise reliable air compressor, please post a link to the source you used.

 

[908Jim]

Appears to be this (double check me on the P/N and Model #)

I'm not sure I'd put a $42 part plus tax and shipping into a decades old oilless compressor though. I would probably save the tank for extra volume and get another compressor.

https://mastertoolrepair.com/piston-connecting-rod-kit-0999af/

 

[carbureted iron]

I have a hunch this component must be purchased as part of an assembly...

reference p/n: N036518

 

[RTM]

Please see my comments here.

Craftsman 919.162120 Horizontal Air Compressor

This request is a bit unusual, but here goes. I inherited some decent small shop machine tools (Drill press, band saw, bench grinder) from my recently deceased father-in-law. One of the items is a little used Craftsman 919.162120 120v Horizontal Air Compressor. My plan was to use this unit at...

www.garagejournal.com

 

[tak1313]

Don't know if it will help, but a few years ago, I got an out of date CH compressor that needed new rings, but could only find it complete with piston.

For your model, would this help?

KK-4964 Air Compressor Piston Kit Oil-Less Porter Cable Dewalt Craftsm – Tri City Tool Parts, Inc.

Genuine OEM KK-4964 / N036518 Piston Service Kit. Part # N036518 Replaces KK-4964, CAC-4069, D26711, 889967, 889162 Includes: Piston Rod, Compression Ring, Cylinder Sleeve & Bearing 48mm ( 1-7/8") Cylinder Bore N036518 Piston Service Kit is an OEM replacement part and is designed to fit many...

tricitytoolparts.com

Edit - it appears others posted part numbers as I was typing my response.