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wood splitter

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Dennis in Wisco

11-05-2004 08:24:10

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does anyone know if a 6.5 Tecumse motor can handle a 2 stage 13.6 gpm pump on a wood splitter -- any help on this would be much appreciated -- Thank You

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jdemaris

11-06-2004 20:39:08

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Re: wood splitter in reply to Dennis in Wisconsin, 11-05-2004 08:24:10

You didn't mention how many gallons per minute the pump is when it shifts to the second stage. 6.5 horsepower will not run 13 GPM at 2200 lbs. PSI and that's about what you ought to have along with at least a 3 1/2 " diameter ram. If the pump shifts down, in second stage to 7 GPM, then YES your engine will run it. As far as the type of wood your are splitting, it has nothing to do with engine power if the machine is setup properly. You need enough power to crack the hydraulic relief valve, and that's all. If a piece of wood is too tough to split, the valve cracks, and the ram stops, but the engine keeps going. If you find you need more splitting power, then the pressure must be raised and/or the diamater of the ram increased. But, doing this will result in needing more horsepower - or doing the job more slowly with a lower GPM pump.

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Paul Janke

11-06-2004 06:32:43

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Re: wood splitter in reply to Dennis in Wisconsin, 11-05-2004 08:24:10

Gallons per minute multiplied by pounds per square inch divided by 1714 is horsepower. This is not taking into account anything other than 100% efficiency. With a small gas engine, probably about half again the horsepower would be pretty close to right.

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Kevin (FL)

11-05-2004 13:53:21

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Re: wood splitter in reply to Dennis in Wisconsin, 11-05-2004 08:24:10

Dennis,

Log Splitter power requirements are greatly influenced by the type of wood being split. Any sized gas engine can be connected to that pump, but the question is--how much force will be needed to split the wood? We have either an 8 HP (might be a 10 HP) MacKissic, made in PA and it will stall the engine on certain live oak logs. For water or red oak it'll run right through. I would suggest that you get the largest engine you can find (10 HP or bigger) and set the relief valve high enough to split the wood you've cut and low enough to protect the splitter components (and you the operator). 6 HP would work on light work but you might find that it won't handle tough logs.

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DickTN

11-05-2004 13:29:24

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Re: wood splitter in reply to Dennis in Wisconsin, 11-05-2004 08:24:10

The rough-n-ready figure is 1 HP/GPM @100PSI. This is for an electric motor, a whole lot more efficient than a gas engine. Without knowing the size of your ram and, more particularly, the size of the hi-pressure pump, it's difficult to say. At a guess, if you're using a 4" ram, probably not. If, when you try it, the engine stalls when you start splitting, you might be able to put a flow control or even a needle valve in the line going to the back of the cylinder. This will slow down the splitting action considerably, but may allow your small engine to handle the job. Flow control would be better than a needle valve because the needle valve will cause your retract stroke to be slow. If you post more information, such as cylinder size, maybe someone can give you better information. DickTN

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DickTN

11-05-2004 13:30:51

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Re: wood splitter in reply to DickTN, 11-05-2004 13:29:24

Sorry, I meant 1HP/GPM @ 1000PSI. Senior Moment!!

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andy b.

11-05-2004 09:59:57

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Re: wood splitter in reply to Dennis in Wisconsin, 11-05-2004 08:24:10

wow, what a coincidence. the B&S 8HP motor on my splitter died last week (maybe you saw my thread on it) and i was trying to decide what to do. i see most splitters are 5 or 6HP unless you get into the bigger ones, where they jump to 8HP. my old 8HP engine was running like crap for a while, so i'm sure i wasn't getting the full power out of it. i found an old New Holland snowthrower with a 5.5HP B&S on it and bought that. the engine starts on the first pull and doesn't smoke or have any leaks, so i'm already two steps ahead of the old 8HP it is replacing. i'll have it hooked up tonight and see how it runs.

andy b.

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11-05-2004 16:00:57

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Re: wood splitter in reply to andy b., 11-05-2004 09:59:57

A couple of things to consider. If you are getting the engine off of a snow blower, it should work fine in cold temperatures. If it gets warm, you could have problems, do not know if they do it anymore, but snow blower engines used to be designed with less cooling capacity because the the weather they were run in. You probably will be underpowered, because your splitter is desinged to run an 8 hp, with a longer stroke, the 5.5 your got is probably OHV, a lot differant torque curve on them fellers. Good luck, I hope all works out good for you.

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andy b.

11-05-2004 20:24:43

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Re: wood splitter in reply to JT, 11-05-2004 16:00:57

you've never seen this splitter.
:-)

actually, the splitter probably came with a 5 or 6HP engine. when i got it the guy bolted a few pieces of wood to the frame and jury-rigged up this 8HP engine. and i can safely say the "replacement" motor is not an OHV engine, as the manufacture date is 1972. thanks for the tip about winter use on the snowthrower engine. i believe the engine tin is the same as the standard B&S engines of the time, but i will check it. i do know the engine does not have an air cleaner, as most old snowthrower engines did not. oh well, the old 8HP engine didn't have an air cleaner either.
:-)

andy b.

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11-06-2004 06:13:40

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Re: wood splitter in reply to andy b., 11-05-2004 20:24:43

Then you should have pretty good luck, then you have the flat head with more torque. The thing they used to do was not put as many cooling fins on the flywheel. and the fins on the cylinder were not quite as deep as the normall ones.

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paul

11-06-2004 03:42:37

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Re: wood splitter in reply to andy b., 11-05-2004 20:24:43

> i do know the engine does not have an air cleaner

Why even bother????

--->Paul

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buickanddeere

11-05-2004 09:53:06

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Re: wood splitter in reply to Dennis in Wisconsin, 11-05-2004 08:24:10

Depends some on the size of the ram. Larger and the speed slows down but the pump pressure required to split a block is reduced. Using a two stage pump on log splitters is one of the smartest ideas I've seen in a while. Gives her speed and drive in a smaller modest priced package.

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Midwest redneck

11-05-2004 08:46:03

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Re: wood splitter in reply to Dennis in Wisconsin, 11-05-2004 08:24:10

You need to know the pressure output needed. and the pressure generated and flow at the small output side of the double pump. You should be able to look up the model # of the pump in a book and it will tell you what the GPM is.

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