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pto pump on grain truck

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Category: Allis Chalmers
Forum Name: Farm Equipment
Forum Description: everything about Allis-Chalmers farm equipment
URL: https://www.allischalmers.com/forum/forum_posts.asp?TID=38556
Printed Date: 16 Dec 2025 at 4:16pm
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Topic: pto pump on grain truck
Posted By: ewbs79
Subject: pto pump on grain truck
Date Posted: 07 Oct 2011 at 9:42pm
Hey I'm building a log splitter and found a pto driven pump off a grain truck wondering if anyone can tell me what kind of rpm rating the pto shafts turn at I know it has to do with engine speed but what would be say low speed rpm be. I don't want to waste my time mounting this up if the rpm is to slow. I know that a 16 hp briggs that I want to run it with turns out about 3600 rpm at full throttle.



Replies:
Posted By: John (C-IL)
Date Posted: 07 Oct 2011 at 10:45pm
I'm thinking that the PTO would turn about 1000RPM, On my feed truck you run the engine at 1500 and the gear reduction brings the pump to about 1000 RPM.


Posted By: TREVMAN
Date Posted: 07 Oct 2011 at 11:09pm
Thats correct. If it is a Williams pump it will run at 3600 for about 5 seconds and grenade, with possiblr dangerous results, Trev.


Posted By: CTuckerNWIL
Date Posted: 08 Oct 2011 at 7:33am
My opinion is it would be a waste of time to mess with it. There is a good reason why somebody designed a 2 stage log splitter pump. The higher volume stage gets the cylinder to working position faster and then the high pressure stage busts through the tuff spots. Without the 2 stage pump, you could do better with a slipping maul for a whole lot less money and wasted time.
 I might add, with 16 HP you'll burn 3 times the gas needed for the smaller 2 stage splitter pumps. We use a 5 hp Briggs and never run out of power. If you want to put the 16 HP to work, match it up with a higher volume 2 stage pump and you can cut your cycle time down considerably.
 There is a good reason why engineers are hired to work for companies that build log splitters.


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Posted By: Robert Mull Georgia
Date Posted: 08 Oct 2011 at 8:09am
C Tucker is correct.


Posted By: ewbs79
Date Posted: 08 Oct 2011 at 9:20am
If I was building a run of the mill wood splitter I wouldn't waste my time building I'd buy one. I'm building something closer to what is called a wood processor. It has a hydraulic motor running a conveyor belt that gonna use up a lot of gpm also hydraulic ram running an adjustable 4 way splitting wedge a cylinder for a log lift and then the main cylinder? Still think 2 stage is gonna keep up with my demand for fluid?

Also why pay 350 dollars for a pump if you can make a 50 dollar one work with stuff u have laying around



Posted By: DSeries4
Date Posted: 08 Oct 2011 at 10:38am
Think about what Trevman says.  Sure, $50 is cheaper, but how much will your hospital visit cost?

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Posted By: CTuckerNWIL
Date Posted: 08 Oct 2011 at 11:34am
Originally posted by ewbs79 ewbs79 wrote:

If I was building a run of the mill wood splitter I wouldn't waste my time building I'd buy one. I'm building something closer to what is called a wood processor. It has a hydraulic motor running a conveyor belt that gonna use up a lot of gpm also hydraulic ram running an adjustable 4 way splitting wedge a cylinder for a log lift and then the main cylinder? Still think 2 stage is gonna keep up with my demand for fluid?

Also why pay 350 dollars for a pump if you can make a 50 dollar one work with stuff u have laying around


For that kind of money($350) you can buy a 28 gallon/min 2 stage that I guarantee will out split the dump truck pump tonnage wise and you will also have plenty of flow for other add ons. Your old single stage pump will only split the tough stuff if you use a big diameter splitting cylinder and then it will be slow as molasses in January.
 What kind of gallons per minute is the old pump rated for? There is a direct relationship between pump PSI, gallons per minute and the tonnage you can get out of the splitter with a given piston diameter of the cylinder. There is no way to get quick cycle time and high tonnage with a single stage pump. You get one or the other depending on piston diameter.


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Lena 1935 WC12xxx, Willie 1951 CA6xx Dad bought new, 1954WD45 PS, 1960 D17 NF


Posted By: Amos
Date Posted: 08 Oct 2011 at 11:47am
I have a couple of machines very similar to what you are talking about building.  I have never had a block of wood that would not split on one pass through a 9 way wedge or a 6 way wedge (both of these are adjustable by hydraulic ram to raise up or down depending ont he size of the block) on either of my machines.  I ran them originally with a 4 inch ram, not enough, then a 5 inch and the 9 way has a 6 inch but it will run fine with a 5 inch I am sure as I used what I had when I built it and felt a 6 was the right size.  A 28 gal/min pump on each one brings a cycle time of about 5 to 7 seconds one way, I use the same ram via a mechanical linkage to run my saw blade up and down- when the splitter is extended the saw is up, when it comes down the block falls into the open splitter and when the saw goes up the block goes through the wedge.  I have had both me wedges torn off by the 5 and 6 inch rams.  This is a 1 inch by 10 inch steel piece and the wedge pieces do need to be hardened.  pm me if you want more info.  I run both these processorw ith a 6060 tractor and can produce in good straight logs easily 45 face cord per day on about 11 gallons of diesel fuel.  I have run them with other tractors but the 6060 gives the best fuel economy.  Waiting for a two stage pump is a joke in my opinion.



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