Adjusting hydraulic pump flow??? TC35: New Holland Tractor Review  -- New Holland Tractors Discussion Forum and Review Adjusting hydraulic pump flow??? TC35: New Holland Tractor Review -- New Holland Tractors Discussion Forum

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 12-08-2007, 13:49 Post: 149085
WVNHTC35

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 Adjusting hydraulic pump flow??? TC35

I have a 16LA loader on my machine and a set of rear remotes, I had thought I read on here before that you could adjust the hydraulic pump to a higher flow rate, can you do this? and if so, How?

Thanks






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 12-08-2007, 18:33 Post: 149092
DRankin



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 Adjusting hydraulic pump flow??? TC35

I can't speak to that specific model, but generally speaking the flow rate is the flow rate.

You can make adjustments to the PRESSURE generated by the pump by adjusting the pressure regulator.

They are several schools of thought on that topic as to whether it is wise to turn up the pressure and if so, how much is too much.

I am sure others will chime in here as this topic generally stimulates a lot of debate.

Maybe you can tell us what you are hoping to achieve? Does the loader not lift enough weight?






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 12-08-2007, 18:54 Post: 149093
candoarms



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 Adjusting hydraulic pump flow??? TC35

WVNHTC35,

You won't be able to increase the flow rate from the pump. It has a fixed output.

Additionally, increasing the output pressure is not going to help you when attempting to run a log splitter, or any other device that operates off of your rear rear remotes.

Your best option, when looking to run a log splitter, for example, is to purchase a PTO pump and connect it directly to your PTO shaft. You'll then be able to more than double your output flow.

Joel






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 12-08-2007, 21:28 Post: 149095
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 Adjusting hydraulic pump flow??? TC35

WVNHTC35
I cant address your question because I don't know enough about the subject, but since we have a few other interested parties,(especially cando who has been on this topic before)- here is a new qeustion:

Knowing that PTO pumps start at about $400, and hydraulic pumps start at about $140- could a PTO adaptor be used and just turn a hydraulic pump?






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 12-08-2007, 22:33 Post: 149098
earthwrks

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 Adjusting hydraulic pump flow??? TC35

Though there are variable displacement piston pumps which vary the flow, gear pumps (which this TC35 is as was mentioned) is not adjustable. What is/may be adjustable is the relief valve setting but that is not in/on the pump. But be forewarned if you start messing with it you could cause damage to the loader itself by overstressing it.

And sure, you can run a regular gear-type hydraulic pump off the PTO--providing the pump is rated for the input RPM and the rotation direction is correct. Some pumps can be be run either direction with no problems--some can't. Also, hydraulic pumps can be used as a motor too without any modifications whatsoever.






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 12-08-2007, 23:22 Post: 149101
candoarms



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 Adjusting hydraulic pump flow??? TC35

Kleinchris,

I don't mean to repeat myself so often, but this topic seems to pop up on this board quite often.

Over the years, I've studied the possibilities of putting a log splitter on the 3-point hitch of my various tractors. None of the tractors I've owned were capable of putting out enough gallons per minute to run a splitter off of the rear remotes......and I now see that I'm not the only person who has faced this problem.

The ONLY solution available to guys like me, is to purchase a PTO driven pump designed to be run off of the PTO shaft. It is true that many hydraulic pumps will run off of the PTO shaft with some adapters and a little bit of engineering, but there aren't many that have the output flow required to meet the requirements of a log splitter.

It isn't necessary to purchase a new PTO pump. A new one would cost somewhere between 400-500 dollars. But, I often see them on Ebay for a lot less than that.

See Ebay Item# 230195978603 Currently $128.00

In addition to the PTO pump, you'll also need a large reservoir (approximately 20 gallons in size), hoses, fittings, a valve, and the necessary hydraulic fluid. You'll also need a simple bracket to keep the PTO pump from spinning, once it's attached to the PTO shaft on the tractor. Total cost, if everything is purchased new, would exceed 800 dollars. This price does not include the price of the PTO mounted log splitter.

The total price for such a package makes it cost prohibitive. It's cheaper to purchase a self-contained log splitter.

Joel






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 12-09-2007, 00:11 Post: 149102
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 Adjusting hydraulic pump flow??? TC35

I gotta tell you, I have split about 20 cords of wood with a 3 point splitter and a power beyond port on my Deere 4115...total hydraulic pump capacity 7.4 GPM.

Working alone I can split a cord of wood in 60 to 70 minutes. Maybe I am misinformed or just have low expectations, but that seems to be good performance to me.

And working at the tractors 2400+ psi limit there is certainly no problem with actual splitting power.

Even if I could speed things up a little bit with a PTO hydraulic pump (and a separate oil tank and a separate oil supply), it would not be worth several hundred dollars to do so.

the system works just dandy as is.






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 12-09-2007, 00:24 Post: 149103
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 Adjusting hydraulic pump flow??? TC35

DRankin,

You're fortunate to have 7.5 gallons per minute available to you. I'm limited to less than 5 gpm. I agree with you. It wouldn't be worth the money to go from 7.5 to 11.5 gpm.

Even at 5 gallons per minute, a log splitter will work just fine......but SSSLLLOOOOWWWLLLYYY.

I don't have the patience to stand there watching that splitter cylinder creep out at about 1 foot per minute. That's like watching my wife attempt to parallel park. hehehe.

Joel






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 12-09-2007, 10:27 Post: 149115
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 Adjusting hydraulic pump flow??? TC35

It would be interesting to know if we are on the same sheet of music...... Is the total output on your tractor 5 GPM?

My specs read "Steering Capacity 2.3 GPM, Pump capacity 5.1 GPM, Total Pump Capacity 7.4 GPM"

I read that to say that if it is sitting still and running at PTO speed that there is 7.4 GPM available to the Power Beyond Port, but I could be making a wrong assumption.






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 12-09-2007, 11:17 Post: 149119
Art White



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 Adjusting hydraulic pump flow??? TC35



About twenty five years ago much of the country was in an energy crisis with the oil embargo. There are more xmas lights on right now then there was on xmas day that year! Amazing that the price of our fuel doesn't seem to change many peoples thoughts until the lights go out!
Anyway, we sold chain saws, splitters and everything to help poeple with fire wood. Splitters even then could be tractor mounted or self contained. The three point units were the most economical to purchase but it was soon found some tractors didn't work as well with them. Ford 5000's were a staple utility tractor but they only had 7gpm systems and many soon moved up to the larger tractors to run them. At that they only were about 12 to 15 with a 100 horsepower tractor on them! They could send out the help and have them cut and split wood for the farmer and his helps houses. One farmer I remember had five houses to split for, cost him 2,200 every two years for a new hydralic valve for the tractor! Others that did venture to up the hydralic pressure found that many hoses on tractors were only good for 2000lbs pressure. After the oil prices went down some stopped, but most of the others that had the tractor mount units swapped them in for self contained units. Why run a 30 horsepower tractor when a ten horsepower engine is more then enough? Just think that an 8 horse will push a 16 gallion per minute pump on a splitter!






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Discussion Boards > Active Subjects > Messages as Posted > New Holland Tractor Review Forum

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Art White 2 | candoarms 7 | crunch 1 | DennisCTB 1 | DRankin 5 | earthwrks 2 | kleinchris 1 | Murf 2 | TxFarm 1 | WVNHTC35 1 |




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