building a 3 point log splitter

[rockymountain home]

You should be able to speed up this pump to increase flow rate. You mentioned that your tractor has a 550 and 750 rpm pto speed. If you used your current pump and ran it thru a 2:1 gear box at 750rpm input speed, you should be able to pump around 13gpm at 2750psi, and be close to the max hp rating of your tractor.. Using a 4x2x24 in cyl, you would have about 17tons of splitting force and a cycle time of around 10sec. If you want faster cycle times you could go with a 3.5 bore cylinder, but you would lose a little splitting force.

where can I get a 2;1 gear box, is this something I can run on my currant pto pump or do I have to go with a complete unit like a prince pump

 

[Sawyer Rob]

Just a note: going through a gearbox to speed the pump up, it's going to require a more HP to run the pump.

So, what ever HP it now takes to run that pump, it's going to take quite a bit more after going through a gear box to speed it up.

Same thing if you use the faster 750 rpm speed on your pto. It takes more PTO HP to run your pto at 750. Not a problem if you start out with enough in the first place, but on a smaller tractor it can leave you short.

You say your tractor is 26hp, (what model is it?) I assume that's 26 ENGINE HP, not PTO HP AND your HP rating will be at 54o rpm's, NOT 750 rpm's... 750 PTO HP will be less than 540 HP...

SR

 

[rockymountain home]

Just a note: going through a gearbox to speed the pump up, it's going to require a more HP to run the pump.

So, what ever HP it now takes to run that pump, it's going to take quite a bit more after going through a gear box to speed it up.

Same thing if you use the faster 750 rpm speed on your pto. It takes more PTO HP to run your pto at 750. Not a problem if you start out with enough in the first place, but on a smaller tractor it can leave you short.

You say your tractor is 26hp, (what model is it?) I assume that's 26 ENGINE HP, not PTO HP AND your HP rating will be at 54o rpm's, NOT 750 rpm's... 750 PTO HP will be less than 540 HP...

SR

I believe my pto horsepower is around 18, but it runs my back hoe at just above idle to half throttle with no problem, even digging in tough soil

 

[CRThomas]

Call Doug at Ram Splitter he tell you what you need

 

[CRThomas]

My 30 up tractor power take off is about 24 PTO up look in your book it has the PTO up in there

 

[Sawyer Rob]

I believe my pto horsepower is around 18, but it runs my back hoe at just above idle to half throttle with no problem, even digging in tough soil

18 hp at 540 rpm's sounds about right. (it will be less on your 750 rpm speed) Sure it runs your hoe, it will run a splitter too, it's just about how fast and with what size cylinder... A larger pump won't give you more power, it WILL give you more speed, also the kind of pump matters too...

The reason most splitters run well with a smaller motor HP is, they are using 2 speed pumps on them. I bet the pump on your hoe is a 1 speed pump, nothing wrong with that, you just need enough HP to run it to have a lot of power on a splitter.

My 3 point splitter has a 1 speed 20 gpm PTO pump on it, it requires 20 PTO hp to get full power out of the pump... AND it does have a LOT of power and plenty of speed.

SR

 

[rockymountain home]

18 hp at 540 rpm's sounds about right. (it will be less on your 750 rpm speed) Sure it runs your hoe, it will run a splitter too, it's just about how fast and with what size cylinder... A larger pump won't give you more power, it WILL give you more speed, also the kind of pump matters too...

The reason most splitters run well with a smaller motor HP is, they are using 2 speed pumps on them. I bet the pump on your hoe is a 1 speed pump, nothing wrong with that, you just need enough HP to run it to have a lot of power on a splitter.

My 3 point splitter has a 1 speed 20 gpm PTO pump on it, it requires 20 PTO hp to get full power out of the pump... AND it does have a LOT of power and plenty of speed.

SR

my pto pump is the same specs as the one posted earlier in this thread, its a 1;1 ration 2.05 cu. in. and the advertized rating is 18 hp at the pto.