On the big hydraulics I have seen
The two winning aspects are a hand winch driven cross beam (pins still lock it to the uprights) so to change the height of the deck with the winch rather than struggling with a long heavy deck
And the other is a little harder to explain:
The bit which moves and presses onto the part is the press head
So in your setup the end of the ram will be the press head
In this alternate setup attached to the end of the hydraulic ram is a 200mm length of very large Acme thread
Over this is essentially a sleeve (internally threaded for the Acme) which extends downwards
Sleeve has a hand wheel on it and the far end of the sleeve becomes the press head
So you grab your stuck ducks nuts chuck it on the deck
Winch the deck up towards the press head drop in the side pins
Then position the part and with a flick of the wrist rotate the sleeve down onto the part
this holds eveything in position by preloading the job
Then you stand well back with a coldy and start cranking or fire up the hydraulics and watch the nuts fly off!
Ill see if I can grab a few photos of what I talk of - Sheetetal joint in town has a monster press that I somewhat covet !
S
'95 130 dual cab fender (gone to a better universe)
'10 130 dual cab fender (getting to know it's neurons)
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