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 03-01-2014, 18:42 Post: 189352
paulmo



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 Rear Log Splitter Build Project Part 2

Log splitter build questions!
For anyone,
The question is,... Will a transmission oil cooler, or a small radiator,used to cool the hydraulic fluid withstand the pressure on the return line?

The pump is rated 11 GPM, The splitter cylinder is rated at 2500 lbs.
Also I'm unsure about fittings for that kind of set up since a radiator would be so light.

Any help would be much appreciated! Thanks!






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 03-01-2014, 21:50 Post: 189354
chashm



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 Rear Log Splitter Build Project Part 2

On a line that returns to the tank, it shouldn't be a problem as there is no (or very little) back-pressure ever on this line.
If you're hooking the cooler in a line that might have real pressure on it, you're unlikely to find a cooler rated at 2000+ psi although I suppose you could fashion one out of steel line.

But why do you think you need one in the first place?






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 03-01-2014, 22:35 Post: 189355
chuckles



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 Rear Log Splitter Build Project Part 2

As long as your tank holds 5 or more gallons with the 11 gpm pump you would be in line with almost all the best log splitter manufacturers that use the quantity of oil to cool fluid without a cooling radiator.






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 03-02-2014, 08:15 Post: 189358
candoarms



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 Rear Log Splitter Build Project Part 2

Somehow we got a bit off track here.

Paulmo is building a gas-powered, hydraulic power pack to be used for powering a log splitter first... with the option of powering other hydraulic equipment in the future.

Installing a heat exchanger on a log splitter isn't necessary, but should he decide to run a hydraulic motor for hours on end his power pack should have a heat exchanger on it.

The heat exchanger (radiator) is never placed in the pressure side of the circuit. It is always placed in the drain side.....no pressure.......in the return line from the control valve.....back to the tank.

Joel






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 03-02-2014, 10:27 Post: 189359
chuckles



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Quote:
Originally Posted by candoarms | view 189358
Somehow we got a bit off track here.Paulmo is building a gas-powered, hydraulic power pack to be used for powering a log splitter first... with the option of powering other hydraulic equipment .....



I think we have a case of the Road to Abilene Paradox on this project.

In an Abilene paradox a group of people collectively decide on a course of action that is counter to the preferences of many of the individuals in the group.[1][2] It involves a common breakdown of group communication in which each member mistakenly believes that their own preferences are counter to the group's and, therefore, does not raise objections. A common phrase relating to the Abilene paradox is a desire to not "rock the boat".

Our original poster asked for the bare bones simplest way to attach a splitter to his rear hydraulics Smile Now he is into an extensive project which is great but I have to think somewhat off track of where he started....

I for one have been massively entertained by the mushrooming of this project. It is probably the most interesting thing on this site, so please keep going ...






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 03-02-2014, 12:05 Post: 189361
candoarms



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 Rear Log Splitter Build Project Part 2

Chuckles,

Growing up on a farm, I was always surprised by the huge number of engines, batteries, and tires that we had to maintain on a constant basis.

Every piece of equipment had it's own engine and battery. I lost track of the number of tires as I was attempting to count them. Keeping track of air filters for each motor was a pain in the back side. Keeping fresh engine oil in all of those engines was even worse.

Paulmo wants a log splitter. He has many options available to him.

After many short discussions, Paulmo decided that he'd rather have a power pack, which can be used to power many different pieces of equipment. Building a single power pack will prevent him from having to install a motor and pump on every piece of equipment around the farm.

In reality, building the power pack is no more complicated than placing a motor and pump on his log splitter. However, since power packs can be used to power many different types of equipment.....each placing different power demands on the pump and motor.....the power pack has to be designed to handle any possible situation in which it could be employed.

When power demands become heavy, it is imperative that some sort of cooling system is installed in the hydraulic return circuit. Hours of continuous use will cause the hydraulic oil to get very hot. Heat is a primary cause of failure in hydraulic systems.

A log splitter requires a Motor, Pump, Control valve, hydraulic tank, and a cylinder. It does not require a heat exchanger for cooling, but hydraulic motor circuits certainly do. Paulmo has everything available to him, with the exception of the pump and a few fittings.

There's no sense in building dozens of these hydraulic power stations when a single motor-pump combination can be used to power a conveyor in the morning, and then moved to the shop to power a hydraulic tubing bender in the afternoon.

Sorry for any confusion I may have caused.

Joel






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 03-02-2014, 12:51 Post: 189362
chuckles



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Joel,

I think the quality of the advice that has been given has been excellent and yours in particular outstanding!

And it is a great project in deed. It reminds me of my own tinkering... and project scope creep I always seem to prefer. So I am getting a kick out of it as well as you aptly recap where Paulmo is now building a multi use power pack, when he stated in his earlier thread he had no other use for the hydraulics other than powering his splitter. But he will doubtless find many uses for it in the future aside from the wealth of knowledge he has gained and we have all shared in.

This is all good and it is what I do in most things I start... But humorously I just wanted to poke some fun at how we all expand our needs to grow exponentially beyond our starting points....

It reminded me of this old Monty Python skit of the Society for putting one thing on top of another thing.


Toastmaster (Eric Idle): Gentlemen, pray silence for the President of the Royal Society for Putting Things on Top of Other Things.

(There is much upperclass applause and banging on the table as Sir William rises to his feet.)

Sir William (Graham Chapman): I thank you, gentlemen. The year has been a good one for the Society.

Crowd: Hear! Hear!

Sir William: This year our members have put more things on top of other things than ever before. But, I should warn you, this is no time for complacency. No, there are still many things, and I cannot emphasize this too strongly, not on top of other things. I myself, on my way here this evening, saw a thing that was not on top of another thing in any way.

Crowd: Shame!! Shame!!

Sir William: Shame indeed, but we must not allow ourselves to become too despondent. For, we must never forget that if there was not one thing that was not on top of another thing our society would be nothing more than a meaningless body of men that had gathered together for no good purpose. But we flourish. This year our Australasian members and the various organizations affiliated to our Australasian branches put no fewer than twenty-two things on top of other things. (applause) Well done all of you. But there is one cloud on the horizon. In this last year our Staffordshire branch has not succeeded in putting one thing on top of another.

Crowd: Shame!! Shame!!

Sir William: Therefore I call upon our Staffordshire delegate to explain this weird behaviour.

(As Sir William sits a meek man met at one of the side tables.)

Mr Cutler (John Cleese): Er, Cutler, Staffordshire. Um... well, Mr Chairman, it's just that most of the members in Staffordshire feel... the whole thing's a bit silly.

(Cries of outrage. Chairman leaps to feet.)

Sir William: Silly?? SILLY!! (he pauses and thinks) Silly! I suppose it is, a bit. What have we been doing wasting our lives with all this nonsense? (hear, hear) Right, okay, meeting adjourned forever.








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 03-02-2014, 17:17 Post: 189373
paulmo



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 Rear Log Splitter Build Project Part 2

Thanks Joel,

I should have remembered that the return line carries little pressure. I plan on using 1" hose for both the suction side and return side, and am still trying to locate a used radiator or trans cooler in our area.
I'm also using a 15 gallon tank, which should handle anything I'll be doing, again in the future.

Thank you again!

Paul






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 03-02-2014, 17:23 Post: 189375
paulmo



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 Rear Log Splitter Build Project Part 2

Chuckles,

Perfectly put! but we're having so much fun doing it!

Thanks,

Paul






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 03-02-2014, 18:41 Post: 189377
candoarms



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 Rear Log Splitter Build Project Part 2

Paul,

You've got a good plan there. A 15 gallon tank is excellent. The 1" suction and return lines will work great.

I'm sure you'll be very happy with the outcome, but if you need anything else along the way, please don't be afraid to ask.

Enjoy the build project.

Joel






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