Later pumps are tighter than early pumps but I don't have the year or serial number break.
I have never taken a countershaft driven Liftall apart. But there has to be a pressure relief valve in there somewhere. I assume it can be adjusted for higher or lower pop-off.
Countershaft turns at 37% of rated rpm of 1400. That would be 518. Seems very slow for a small pump. I think it might be alright at 2000 rpm but YMMV. If it seizes up, run the next one at 1500 rpm.
I'm thinking I wouldn't mess with the pressure. But would overdrive it. I would also use a 5" or 6" cylinder on a log splitter as the psi on those pumps is less than 1000.
All-in-all, I probably wouldn't use the Liftall for any continuous use. It would do OK on something like a lift in your shop or on some vehicle. But you could get something like pallet stacker reservoir/pumps/motors that will work better.
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