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Tool Talk Discussion Forum

Repairing hydraulic jack

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Willy P

01-23-2006 06:43:36

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I have a floor jack that is not working good and I would like to keep it and thought about tearing in to it and fixing the leaks,are they easy to fix? It is a Craftsman and I think that I have the book to order parts or do they use regular o-rings? What does the piston consist of in a regular bottle jack? Is there anything that goes bad in them besides o-rings? I am talking about the piston that moves back and forth to pump up the oil. Thanks

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drw

01-24-2006 18:54:02

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Re: Repairing hydraulic jack in reply to Willy P, 01-23-2006 06:43:36

Parts are available for some of the older green ones made in Japan, most of them are just now going bad that were purchased 15-20 years ago. If
your model begins with 328.XXX, it is a good Yasui. If starts with a 727.XXX, it is a Blackhawk. Sears wont't be able to help you with parts for either one, and won't act like they want to either. A decent jack shop should have parts in stock or be able to order them. If it starts with a 214.XXX or 215.XXX, throw it away.

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jake1

01-24-2006 16:15:05

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Re: Repairing hydraulic jack in reply to Willy P, 01-23-2006 06:43:36

The most common failure on these floor jacks is the relief valve, take the cover plug cover off and chances are the relief coil spring will be bent or broken,replace with a heavy coil compression spring. Been there.

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T.C. in Tx

01-23-2006 18:49:42

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Re: Repairing hydraulic jack in reply to Willy P, 01-23-2006 06:43:36

I have a Sears floor jack that had a similar problem. It is a few years old, green in color and was made in Japan. Sears did not have parts or a listing. I did have the original tag with all the numbers, etc.

The solution in my case was to disassemble the jack. Found the bad seal and took the jack and seal to the local air and hydraulic shop. They sized up the seal and ended up ordering the correct seal for me. I believe the cost was around $12. Good luck on your project.

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Charles (in GA)

01-23-2006 15:10:42

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Re: Repairing hydraulic jack in reply to Willy P, 01-23-2006 06:43:36

Is this a old floor jack? '60s' or '70's possibly? Readily identified by the rear caster supports, they are cast iron, not stamped steel, and a squarish lift pad with raised corners, very heavy?

Sears no longer provides parts for this jack, it was made by Blackhawk.

Go here for parts

Link

or you might check with these folks,

Link

Charles

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Dave Sherburne,NY

01-23-2006 09:21:12

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Re: Repairing hydraulic jack in reply to Willy P, 01-23-2006 06:43:36

If you have to tear it down, sears has a parts website where you might find an exploded view.

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Adam2

01-23-2006 08:50:56

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Re: Repairing hydraulic jack in reply to Willy P, 01-23-2006 06:43:36

Have you checked the hydraulic oil level of the jack?

Storing a jack in a non-horizontal position can cause fluid leakage.

As does, someone not familiar with the jack, pumping the handle, without closing the release valve.

Sometimes the simplest things go wrong first.

I wouldn't "field strip it" yet.

P.S. Sears sells hydraulic jack oil.

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Kelvin

01-23-2006 06:58:05

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Re: Repairing hydraulic jack in reply to Willy P, 01-23-2006 06:43:36

Willy, I had a floor jack that would only go part way up before it had problems. A guy on here said it probably had air trapped in it. So I turned it over, and propped it up with the saddle fully extended and let it sit for 3-4 days. It got back to working right.

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