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Twenty plus years ago I converted my 55 F600 to a dump stake. I used all the equipment from a 56 F600 grain truck. I don't know if this is the same set up as you have but thought I would post just in case. The hydraulic pump was run from a PTO off the side of the transmission and the cylinder operated from a manual lever. Right now my F600 ( sweet old Bessie) is buck naked and ready for sand blasting so was a good time for pics. The only casting I found was on the cylinder ram end cap " Detroit Gar Wood" who I assume to be the maker. The only number was one stamped on the hydraulic housing " 68709" . If any more things pop up in the sand blasting I will post it. Hope this helps
Louie
Some hydraulic lifts had the pump and reservoir built into them, some were stand alone. Which type is yours? If stand alone, it can be replaced with any similar sized pump.
This place has tons of hydraulic stuff; Surplus Center - Hydraulics, Engines, Electrical and More
The pump and resevoir are built in.. The pump is not stand alone.
I no longer have the pump, I cant seem to find anything that would work.
Scour the yards for an otherwise unusable dump truck and get the cylinder and the pump. You may have to do a bit of fabrication but it should be a fairly straight forward job.