Floor jack 'plunger?'

Is your email address good? I've got a couple old manuals I can send you. One is for a Blackhawk floor jack and the other is for bottle and floor jacks. Parts are similar though.

Can you open/read djvu files? The second manual is in djvu format.

These manuals call that part a "cup washer" and a "plunger cup" if I understand your question correctly.

Hi Leon, email is good. or gherold(at sign)teachspin.com I can't read djvu format.. but I assume I can find something on the web. I don't think I need a manual. But "cup washer" and "plunger cup" look like search terms to start with. If I think about it I'll post a picture this evening.

Thanks, George H.

If you can't find a suitable seal, some are available on ebay and maybe hydraulic supply places, one guy here in the UK repaired a damaged cup seal with Sugru

I sent them to the gmail addy. Give you something to look at :)

Here is a site that I have used for reference on jack parts

Howdy Leon ;-)

Cup seal?

Very nice. Bookmarked for future reference. Looks like a source for both reference and parts. Looks like it has reference for my old Pro-Lift floor jack. I'll have to go check the model number. It has a slow leak somewhere. So far it has been easier to add a little oil once a year or so and keep some old papers underneath rather than try fixing...

Years ago I knew a Larry Fisk, heavy truck mechanic in this area. Wasn't related but a good guy.

Now I know one of my competitors for those "lfisk" login names too ;-)

Thanks got 'em. George H.

Thanks Larry, Unfortunately I have no idea who made the jack.

George H.

Hi George,

Really good info on that website and you don't need to know who made the jack. Take a look at these links, show you how to identify and measure the seals:

Once you got an idea of the measurements, seal names... look at the generic stuff:

I think what you're looking for might be something here:

$20-30 for a single cup? Wow! Not giving them away.

Thanks, ID is ~0.23" and OD 0.47(8)" height is a bit less than 0.3" I'll give 'em a call.

George H.

Hey Leon, I live in central Idaho and have all my life I am heavy and a mechanic, and argueably a good guy :-) I read this group and rarely have much to add I mostly tinker these days, working on a huge (5200lb) doall vertical 26" fully hydraulic band saw here lately

Well that web link was a good addition. I picked an old NAPA bottle jack out of a neighbors trash several years ago. It's probably around a 3 ton and been well or maybe not so well used. I found the manual for it after some searching through the stuff listed on that site. Some trial and error because the model number and specs were rubbed off. I've got a lot better insight in how to disassemble it now, if and when I get around to it. Don't really need it but I don't have a small hydraulic like that. Hauling out a 20 ton for 1 ton work is a bit of overkill. And my small mechanical jacks don't fit so well sometimes...

My local Larry was a pretty stout character too :) Seems like just yesterday I remember my boss saying, "Head over to Acme Transport and see Larry in the garage. He's got a couple trucks that need the radios checked out." As soon as Larry caught my last name I had a bud on my side of things :)