Go BottomHydro power steering Pump s Pressure
 | jeff r
Join Date: Jul 2003 Posts: 428 burton. michigan 
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2004-04-05 82274
Hey guys,
Does anybody know the pressure and volume numbers on an automotive belt driven power steering pumps by any auto manufacturer? I am making an 6.5 X 4.0 1.5 yard hydro dump trailer and I am not especially happy with the 12 volt hydro pump prices starting with 1 way pumps at 279 buckeroos. I was looking at some welding project plans and one plan said it was made with a 12 volt starter motor chain driven to a automotive power steering pump. the infor mation was scant to say the least. I can build a 12 volt starter motor driven by chain or belt to a power steering pump real cheap and easy but I need pressure data to match up a hydro cylinder of the proper diameter. Any tech heads got some pressure and gpm numbers for me??? I was thinking the pressure must at least 1000 psi with at least a 1.0 gpm. I think with a 3.5 to 4.0 inch cylinder hooked up as angled direct push, I need to push at least 5000 lbs. the lift time would be most acceptable. What do you guys think?
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 | Murf
Join Date: Dec 1999 Posts: 7249 Toronto Area, Ontario, Canada 
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2004-04-06 82294
Jeff, I'm not sure of the relief valve settings on those pumps but I do know that in the 'old days' a lot of people around here made woodsplitters powered by a pair of power steering pumps driven by an old lawnmower motor.
If it makes enough power to push a wedge through a block of wood I'm sure it will do what you want.
Best of luck. ....
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 | psimonson
Join Date: Jul 2003 Posts: 57 Northeastern Tennessee
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2004-04-06 82300
We built a log splitter years ago using a GM PS pump. AS I recall, pressure was about 1200 PSI, but volume was low for repetitive cycles with a 4" cylinder. Cycle time shouldn't be a big consideration with your dump trailer.
These pumps are an all steel vane pump that is pretty much bullet proof. Cheap and readily available early model ones that come with the tank on the back can be easily converted to an external reservoir by tapping 4 existing holes and drilling one new 1/8" hole.
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