ID a Blackhawk jack?

[1930artdeco]

I think this is a Blackhawk bottle jack that I got at a yard when I was getting some car parts. I drained out some mocha liquid stuff. So I know it will need a set of new seals and gaskets. It was painted red at some point.

mike

 

[Oregon rock crusher]

Sure looks like a Blackhawk. Here's a catalog cut that looks about the right vintage.

 

[paulsomlo]

With the (in)famous PIA to remove Blackhawk tank nut.

 

[1930artdeco]

Oregon, looks like a 40’s catalogue? Thanks, now I need to verify the lifting ability, hopefully it is cast somewhere on it-as there is no decal/tag anymore.

mike

 

[1930artdeco]

Paulsomlo, that does not sound like fun. How do I get the big nut off?

 

[thehorse13]

That's a 5 ton jack. Look at the top left image from the attached catalog page.

 

[Oregon rock crusher]

Oregon, looks like a 40’s catalogue? Thanks, now I need to verify the lifting ability, hopefully it is cast somewhere on it-as there is no decal/tag anymore.

mike

The catalog cut was advertised as from 1951.

 

[1930artdeco]

Thanks.

mike

 

[paulsomlo]

Paulsomlo, that does not sound like fun. How do I get the big nut off?

Get two 1/4" dowel pins, place them in the "scallops" on the big nut diametrically opposed - you can use small magnets to hold them in place. Get a big pipe wrench with the jaws bearing on the two dowel pins, so that you don't chew up the nut. You'll need at least a 2' wrench and most likely a cheater bar, as well - I use a 3' pipe wrench. The tank nut is on really tight - like maybe 400+ ftlbs, since the reservoir relies on metal to metal contact to seal.

 

[1930artdeco]

Damn. Thanks for tip. I was sort of headed that way as far as getting the nut off. I just didn’t realize the torque needed. Found the seal kit for $37, so clean up and reseal in the future.

mike

 

[don long]

I have the same jack that needs some love. Paulsomio thank you for that helpful tip. I just love the G.J. I've learned sooo much.