Tank Jack
 

I recently bought a couple of these and was told they were WW2 tank jacks?
Do anyone know anything about them? Some have 22 1/2 ton and the other 15 ton.


Thanks

I have an identical jack to the one pictured that I bought from Uptons Engineering many years ago. They referred to it as being a railway jack. I have no other information.

David

Its a Jack, Lifting, Hydraulic (22 1/2 tons) Mk.2 for use with heavy tractors and ARVs. It’s part of the general recovery apparatus. Nice find :)

How did it function, like the German “coffee mill”?

I'm not familiar with the German 'coffee mill' so cannot compare features, design or function.
On these jacks the square upper section is the oil reservoir and also contains the pump. A square shaft sticks out one side of this section and the handle which is about three feet long slips onto this for pump operation. Below this shaft is the valve for lowering the jack.

David

Correction:- the jack I have is 15 ton not 22.5 as the one in the photograph.

Thank for the description, well it is different then. This is the type I mentioned. Which is just gears and a threaded rod

The 15ton isn’t listed in the recovery manual. It jumps from 10 to 22 1/2 tons, with different designs. They probably had other uses though, like the railways.

Interesting, it used engine oil (10HD) rather than hydraulic oil.