log splitter hydraulics

88-1175 · Sep 16, 2013

got a 10 hp kohler with a hydraulic pump mounted to it from a case garden tractor,is this pump capable of the pressure needed for a log splitter
also have a cylinder of about 4.5 inch bore and 4 ft stroke,logs will be 30-32 inches long

Charllie in MO · Sep 16, 2013

I would certainly think so considering your cylinder size and all, good luck with it.

bruce vande · Sep 16, 2013

The pump on my mf/case/ingersoll tractor has an 8 GPM rating at 3000 RPM and the travel circuit relief valve is set at 2000 PSI. A wood splitter attachment was available for the tractor.

Goose · Sep 16, 2013

Should be. Might be a bit slow.

gbs · Sep 16, 2013

it will be one of two things slow and strong,or fast and weak ,to work well you need a two stage pump with a built in pressure sensing port that will connect the two stages together for speed low pressure, high gpm of fluid then release the large sections pressure allowing the small section of the pump to deliver high pressure low gpm of fluid to do the splitting without stalling your engine

Traditional Farmer · Sep 17, 2013

With that large a cylinder it'll be slow.

ohiojim · Sep 17, 2013

if you split much wood you'll want a 2 stage pump as mentioned,..i have one on the 3 point using tractor, has plenty of power but sure is slow..

El Toro · Sep 17, 2013

I used a 10hp Tecumseh engine off a Sears tractor.
I bought the cylinder at a government auction and I think it had 3.5 inch bore. I bought the 2-stage pump from Northern Hydraulics and the control valve. This was back in 1982. I only used a 4-inch I-beam probably should've used 6-inch as the beam bowed some over the years. Hal

Texasmark1 · Sep 17, 2013

Force on the log is area of piston x pressure, usually measured in tons. 4 1/2" bore is 15.9 sq in and if the pump were putting out 2000# you would have a little over 15 tons. Looking at catalogs, that would be on the low end of the list for pressure. Would need a very sharp blade and minimum friction in the sliding mechanism for stubborn logs.

On rate, 8 gpm roughly for a 30 hp utility tractor. Volume in cylinder is 15.9 x 48 = 763 cu in. A gallon is 231 cu in or you have about 3.3 gallons. With an 8 gallon per minute pump that would be about 2 1/2 strokes....1 out, 1 back, plus 1/2 back out per minute.

Agree it would be pretty slow and things like water elm would be a problem.

HTH,
Mark

merlynr · Sep 17, 2013

Built this about 4 years ago using 11hp elect start B & S eng coupled to 16 gpm 2 stage pump and 4x24 ram. There have been a few times it stalled out but it was gnarly/fork.
I got the ram and pump plus the filter from Northern Tools .
The loglift is only 1 year old.

Lou from Wi. · Sep 17, 2013

We built ours using 8 hp Briggs with a 5x24 cylinder . Been splitting everthing from oak to elm.Been at this splitter for since 02. Avg 20 cord (logger)a year. A great unit Built it from a picture from Northern Tool. Try surplus Center. They have formulas for applications on Hydraulics. Those folks know their business.HTH
LOU

PS we're not affiliated with Surplus Center, just used their products before.

Surplus Center hydraulic calculator

Texasmark1 · Sep 17, 2013

You have the right answer on the blade. Sharp to start the cut and
flare to make it split the log. BTDT Build my own.

Mark

log splitter hydraulics

88-1175

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Charllie in MO

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bruce vande

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Goose

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gbs

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Traditional Farmer

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ohiojim

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El Toro

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Texasmark1

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merlynr

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Lou from Wi.

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