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Dump trailer hoist #1542 09/14/2020 08:02 PM
Joined: Jan 2019
Posts: 461
sonny Offline OP
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I gotta get rid of this battery destroying electric-hydraulic pump on my dump trailer. ---- wanting to put a gas engine driven hydraulic system in it's place. Thinking of 8 hp b&s motor, a medium size hyd. pump, res. big enough to run 2 long stroke cylinders, and a control valve. ---- also the cylinders on this trailer are 2-way,---power up--power down.
Thinking 8 hp should be big enough to run the pump.
Opinions?? --- suggestions?
The battery does NOT charge from the truck ---- They claim it s'posed to but wiring is all inside the frame and looks like mice have eaten most of it up, so instead of messin with that and still have the battery problem I want to go gas power.


"A machine you build yourself is a vote for a different way of life. There are things you have to earn with your hands."
Re: Dump trailer hoist [Re: sonny] #1545 09/16/2020 09:19 AM
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bunkclimber Offline
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Sonny you only need the amount of HP that the speed of the cylinder vs.pump GPM requires..if you have a dump trailer then the cylinder speed really doesnt have to be that fast..do you already have the 8hp engine and are designing in reverse? I think the cheapest way would be a 11 or 16gpm splitter pump,it would give you fast dump speed with light brush or light material, but would have the pump kickdown for heavier material dumping at slow speed where you need hoist power..the 11gpm pumps are everywhere for about $100..even a 5hp engine will push a 11gpm 2-stage pump.

Re: Dump trailer hoist [Re: sonny] #1546 09/16/2020 12:07 PM
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sonny Offline OP
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I have the engine, an old pump from a combine that I used for many years on our log-splitter, the control valve, and the res. for it. Kinda thinkin since this was also a 2-way system it might work. I haul anywhere from a few hundred pounds to 5 or 6 tons on the trailer.----at times if loaded too much on front, I use long farm jack or a loader to help start the lift, so that part is no problem.---I always load it center or a bit tail heavy if heavy stuff,---gravel, wet manure, etc. --- After I got the feel of loading it, havent had a lift problem!.
The pump dont have to be fast,--just enough power to lift the bed. This electric pump is quite small and VERY slow---thats what kills the battery all the time.


"A machine you build yourself is a vote for a different way of life. There are things you have to earn with your hands."
Re: Dump trailer hoist [Re: sonny] #1548 09/17/2020 01:55 PM
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bunkclimber Offline
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I guess you could always just belt drive the pump and slow the pump down to match your HP of the engine you're gonna use with different size pulleys.


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