50's-60's floor jack identification help

[D4nnyB0i]

I inherited this floor jack awhile ago and every spring I have to re-fill the reservoir and would like to know any info on available if possible, only thing i know about it is its more than likely a 2-4 ton jack and it was probably built in the 50's or 60's when my great grandfather bought it. any help is appreciated!

 

[Hiball]

It’s either a Blackhawk SJ-3 or SJ-4, a side view picture would help me judge length and determine, Definitely not from the 50-60’s, I believe the SJ series came in the 70’s.

 

[D4nnyB0i]

ill get ya a side profile in the mornin, in the mean time how difficult do you think it is to do tear down and cleanup/seal replacement on a unit like this?

 

[Hiball]

It’s definitely more user friendly than say the S series it replaced, in regards to rebuilding. I never was a big fan of the SJ series jacks, it was Blackhawks big Hoorah before everything went imported and they just tried to make Money off the Brand.

As always, Before you fork over the Money for a seal kit, a documented tear down and inspection should be made to make sure it a rebuildable candidate.

 

[D4nnyB0i]

It’s definitely more user friendly than say the S series it replaced, in regards to rebuilding. I never was a big fan of the SJ series jacks, it was Blackhawks big Hoorah before everything went imported and they just tried to make Money off the Brand.

As always, Before you fork over the Money for a seal kit, a documented tear down and inspection should be made to make sure it a rebuildable candidate.

heres the side profile, are there any video resources for tearing down a jack like this so i have a guide?, ive looked on youtube but couldnt find anything

 

[Hiball]

I’m not aware of any guides or videos on these jacks, I think it’s a SJ-4 but Hydraulic Parts Supply in Sawyer KS can distinguish between the two based off the Ram diameter.

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