Convert bottle jack

[zeeker]

Does anybody know the proper way to convert a bottle jack to air over hydraulic? I saw a video one time of how to do it but NOW I just can't find it! We use this bender to build some racecar parts and are trying to make it a little more user friendly. We removed the bottle jack and installed a body man's type port-o-power cylinder that works great but just doesn't have enough stroke. Our search for a tad longer stroke cylinder (without spending mega-dollars) has came up empty. I hate to screw up a good jack by experimenting so I need some instruction on how to do it right the first time. I know harbour Freight makes a jack for this application but it's just too big. Thank you in advance for any and all help...........zeeker

 

[McLean]

I havent done this, but I believe you need to tap into the high pressure zone by drilling through the side and top of the cast piece. The outer jacket of the body is just a fluid reservoir. Try googling "tap bottle jack for pressure gauge" and that should get you some results.

 

[Richard D]

Is a 20 ton too big? Northern Tool has them for under $100.

 

[Bondo]

Does anybody know the proper way to convert a bottle jack to air over hydraulic?

Ayuh,... Ya need an air cylinder to drive the pump on the jack,....
probably easier to find another hyd. cylinder for what ya got,...

I think the smaller harbor frigth air/ hyd jack is 12 ton,...
If it'll fit in yer bender, that's yer best/ cheapest option,.....

 

[zeeker]

We have the air/ hydraulic unit. Note the blue piece in the pic.

 

[Bondo]

We have the air/ hydraulic unit. Note the blue piece in the pic.

Ayuh,.... So yer sayin' ya wanta use the hyd. jack, as a hyd. ram,....

Not to convert the bottle jack to air over hyd....??