I have had a Craftsman Professional hydraulic floor jack for probably 20 years I use for working on my truck. It suddenly stopped being able to lift my truck and noticed a leak on the piston in the jack.

I did not want to buy a new jack as they are expensive and the one I have is high quality and wasn’t cheap. I watched some videos and figured out what I probably needed to replace.

I ordered a $30 repair kit consisting of o-rings and a seal from https://www.hcrcnow.com/ .

I pulled the piston from the jack and the HARDEST part was getting the cap off the piston to take it apart. It was a 2” nut cap and I spent forever trying to get it off but couldn’t. I took it to a shop and they had trouble, but got it loose.

Today I took it all apart and the piston seal basically was disintegrated. I replaced it and all o-rings I came across. Now the jack works just like new. I saved a bunch of money by getting this parts kit and this company has parts for a large selection of jacks so if you need to fix your jack, they are the place to check out.

Thanks for posting this. I have a Sears 3-Ton Floor Jack that's at least 35 years old (mid 80's vintage / Made in Japan) that's been sitting in my garage collecting dust, awaiting a rebuild. It was always a solid jack but it started leaking/leaking down and I replaced it with a low(er) profile Craftsman Professional 3-Ton Aluminum Floor Jack around 2005.

I find myself needing a second jack lately and really need to get my Sears 3-ton back in service. I had always intended to rebuild it, and for $59.72, now I can!

I wish I had known about that several years ago, when I pitched my usa made HD craftsman floor jack, for lack of parts. a hydraulic repair company told me they could fix it but it wouldn't be worth fixing cost wise. i hated to ditch that jack, it was really good quality.

Thanks, I’ve got a 2.5 ton Walker or Lincoln floor Jack with leaking seal. It works fine when I fill it but it leaks out soon.

Is heavy, all heavy steel, steel wheels, etc. Its all I can do to lift it. These were commonly referred to as Service Station Jacks.

Appreciate the info. There are getting to be fewer and fewer repair shop/ people around.

This message has been edited. Last edited by: OKCGene,