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 01-09-2001, 08:42 Post: 23232
Paul Chase



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 3 pt log splitters

I'm thinking about either building or probably buying the $400 3pt log splitter from Northern Tooling as long as I can use it on my '98 NH1725. There are no hydrolics at the rear of the tractor, they'd have to be added. People have said the ram operation is slow on smaller tractors if you don't add a P.T.O. pump. My question is, how slow is slow? I can work slower to take advantage of the relatively inexpensive splitter, as long as the tractor has the umph to split. I rented one with a P.T.O. pump last year and it worked just fine. Any thoughts? Thanks.P.C.






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 01-09-2001, 17:48 Post: 23240
al



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 3 pt log splitters

two friends of mine have had these type splitters one runs off a bobcat the other off a 35 hp Kubota it takes about one and a half to two men to feed the thing with someone running the valve. seems to work just fine plenty of omph, never saw a log it would not split, including lots of oak, red and white. i dont think you will go wrong, i am thinking of getting one of thes for my tractor, the going price seems to be about 400 dollars in these parts.

al






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 01-09-2001, 19:14 Post: 23242
Ken Califf



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 3 pt log splitters

I own one of these splitters from Northern, I use it on my J.Deere 1070 tractor off the rear hydraulic couplings. The flow on this tractor is 8.4 GPM and it works just fine. It will split as fast as I want to feed it, safer that way too. Sure beats five of your best buddies with mauls.






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 01-10-2001, 05:17 Post: 23254
Terry Weivoda



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 3 pt log splitters

Ken, thanks for the post. I was interested in the Northern splitter a couple of months ago. I called the Northern Customer Service number to try to get more information than what you see in the 2" square ad in their catalog. I was a given the number for the manufacturer. I was told by the representative that the hydraulic pump on my 4600 was to small (about 10 gpm) and that I wouldn't be happy with the performance. I had a chance to buy a used one that was in new condition for $200 but let it go because of my conversation with the manufacturer. I've said it before. We get more useful information from this message board than we get from the manufacturers, dealers, etc.






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 01-10-2001, 06:22 Post: 23258
TomG

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 3 pt log splitters

The number and diameter of hydraulic cylinders on the splitter mostly determine the power of a splitter. Hydraulic pressure, of course, also affects power, but hydraulic pressures in compact tractor systems tend to be similar. Larger cylinders provide more power, but also increase cycle times, since more oil has to be pumped. Cycle times should be able to be estimated by using a formula for calculating the volume of a cylinder and the gpm rating of the hydraulic pump. However, I've got a question. I don't know whether the gpm rating of a hydraulic pump is under load or with open centre, or even if there's much of a difference. The cycle time also would be shortened if the splitter used a regenerative circuit to retract the cylinder. However, it might be easier to just accept the endorsement of several people who say that a splitter and an 8+ gpm tractor works OK.






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 01-10-2001, 10:22 Post: 23260
Paul Chase



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 3 pt log splitters

I thought my spelling of hydraulics looked funny. Oh well. Dealer says my 1725's G.P.M. is 7. I think that's close enough to give it a try. If it's too slow I can always add a P.T.O. pump.
P.C.






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 01-10-2001, 12:34 Post: 23265
Mark Goehring



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 3 pt log splitters

GPM is measured under no load - out the pump, through the reservoir and back. Open Center means the fluid is flowing through the valve and then back to the reservoir when the system is not doing any "work" with a cylinder (or motor, for that matter)






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 01-10-2001, 18:07 Post: 23277
Ken Califf



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 3 pt log splitters

Paul, I didn't mention that before I bought my splitter, I was fortunate to borrow one similar to the Norther unit. At that time I had a J. Deere 950 with about 7 GPM. and it work good enough that I was ready to buy my own. I traded the 950 for the 1070 before I got the new splitter. I think you will be satisfied with it's performance. Good luck.






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 01-10-2001, 18:45 Post: 23278
Craig



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 3 pt log splitters

Paul, hydraulic cylinder speed is strictly a function of flow rating. A 4 inch cylinder will extend at the rate of 18 inches a minute times the gpm of your machine (18 times 8 gpm flow = 144 inches per minute). They retract faster depending on the cylinder size. A 5 inch cylinder extends at 12 inches per minute times flow rate. I guess if your tractor hydraulics are up to specs you could compare the the speeds of cylinder movement against the PTO pump rating of flow. Keep in mind a PTO pump rated at 10 GPM and 2500 PSI will need about 17 PTO hp, increase the pump to 15 gpm and 2500 PSI requires 26 hp. I have most of my hydraulic experience through the school of hard luck until I read a set of manuals titled "Industrial Fluid Power" vols 1-3 that I bought from the Surplus center catalog.






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Discussion Boards > Active Subjects > Messages as Posted > Tractor Implements Forum

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