Help with weaver jack I.d.

[farmall400]

Picked this jack up off of craigslist this weekend. I know it's a weaver just not sure which model. Has a broken caster but jack seems to work.

 

[Hiball]

I believe its a 4 ton, but there should be some Stamping on top of the Hydraulic Unit, 72= 2 ton, 73= 4 ton.. If you need any parts.. Castle Equipment is your Cheapest and best bet.

 

[farmall400]

Thanks, I'll see if I can see what is stamped.