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Belt-drive hydraulic pump for log splitter

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Zira

01-16-2003 16:36:54




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I am trying to find a source for a belt drive hydraulic pump for a home-brew log splitter. All the generic ones I have found (especially 2-stage ones)are direct-couple only. Unfortunately, the PTO on the motor I have is 1-7/16", and the motor max's out at 2200 rpm. This makes it difficult to find a pump that will work coupled directly.

New or used is okay, actually used is preferred due to cost. I won't scrimp on hydraulic lines, etc. so I am trying to go cheap where ever else I can.

Thanks

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Skinner

01-17-2003 03:57:29




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 Re: Belt-drive hydraulic pump for log splitter in reply to Zira, 01-16-2003 16:36:54  
Not sure what configuration your motor is, or what the max speed of your pump is, but it can be accomplished several ways. If you still want to go direct drive, there are numerous couplings out there that vary shaft sizes. If the engine is a horizontal shaft, think about putting the right size pulley on the engine, and using a belt to drive a small pony shaft with bearings at each end, then make the pump fit the end of the pony shaft. You use the pony shaft to take the side load and not the pump. With this method, you can make the pump speed anything you like, but be aware, now the pump will turn opposite direction of the engine. BTW, there are numerous horsepower calculators out there for hydraulics if you need one. It will help you determine the flow and pressure of the pump you need, plus determine the stroke speed of your cylinder.

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mark ct

01-17-2003 06:54:43




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 Re: Re: Belt-drive hydraulic pump for log splitter in reply to Skinner, 01-17-2003 03:57:29  
if you use a belt to drive the pony shaft(jackshaft) it will turn the same dirrection as the engine, if you gear drive it will turn the opposite direction tho.



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Skinner

01-17-2003 15:43:45




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 Re: Re: Re: Belt-drive hydraulic pump for log splitter in reply to mark ct, 01-17-2003 06:54:43  
Your 100% correct, too early this morning!! Thanks for fixing this.

Richard



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Terrance

01-17-2003 07:19:46




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 Re: Re: Re: Belt-drive hydraulic pump for log splitter in reply to mark ct, 01-17-2003 06:54:43  
Acrually the rotatoin of the pump depends on which end of the jack shaft the pump is attached to.If it is on the end away from the motor it will turn reverse of the motor rotation.Lovejoy couplings can be bought with different bore sizes for each half, and if one happens to be a odd size it can be bored at any machine shop to the proper size very cheaply.
Terrance



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Zira

01-17-2003 15:14:20




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 Re: Re: Re: Re: Belt-drive hydraulic pump for log splitter in reply to Terrance , 01-17-2003 07:19:46  
The range of Lovejoy couplings in McMaster Carr or Grainger does have a size that acccomodates 1-7/16" (motor shaft size) on one side and 3/4"" (pump shaft size) on the other. I had thought of the jack shaft, for all the reasons listed. It does seem like I will have to get keyways machined into 2 ends of the shaft, not sure how expensive that would be. The whole set up would be relatively long, although that probably won't hurt. Just thought there might be an easier way.

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Zira

01-18-2003 06:54:17




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 Re: Re: Re: Re: Re: Belt-drive hydraulic pump for log splitter in reply to Zira, 01-17-2003 15:14:20  
I don't know if Lovejoy makes them or not, but they are not in teh Grainger catalog or my local supply house (Central Carolina Supply). I hadn'tthought about pre-keyed shaft, that has real possibilities. Thanks.



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Skinner

01-17-2003 16:39:44




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 Re: Re: Re: Re: Re: Belt-drive hydraulic pump for log splitter in reply to Zira, 01-17-2003 15:14:20  
Yes, keyways can be expensive to machine, but it's cheaper to buy the shaft with a keyway all the way down it, actually they are reasonably priced. I'm a cheapskate sometimes and just remove the allen screw, drill the hole in the shaft, then tighten the allen screw back up. Never had a problem and I do this with all of my lockable bearings and pillow blocks. Since it's hydraulics, you may want to spring for the right shaft. Are you sure LoveJoy doesn't have 1-7/16" couplings? I swear we use them all the time to drive small gear pumps off Briggs engines. We use them for oil transfer pumps. Maybe I have my size wrong, but I thought we went from 1-7/16" to 7/8 on all of these. If I remember right, we "were" buying them from Graingers until a local supplier started stocking them for us. I'll have to remember to check on it.

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Don LC

01-16-2003 22:27:01




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 Re: Belt-drive hydraulic pump for log splitter in reply to Zira, 01-16-2003 16:36:54  
Have you thought of chain drive? Any way you go ,be sure to put a strong guard on it just in case.....



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Hayman

01-16-2003 23:50:06




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 Re: Re: Belt-drive hydraulic pump for log splitter in reply to Don LC, 01-16-2003 22:27:01  
Hi,maybe if you mounted the pump on a base with the pump drive running into a pulley block.I am sure you can get couplings to take care of a slight misalignment.I don't think those pumps can take much side-thrust.



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