LOG SPLITER BUILD

[perkins78]

I'm sure that you have seen them on other builds but I would highly recommend the auto cycle valve so that you just pull the levers and go grab your next piece. When you return the cylinder is already retracted and you put the piece on. Expensive but IMO worth it.

With that engine you will be able to raise the 28GPM side of the pump to its max of 900 PSI. You will be surprised just how much will be split without the pump going into low flow. It will be moving pretty quick and hit the wedge with 10 tons of force to pop it. And then you always have your 41 tons as a backup :thumbsup:

Where is the fuel tank? That engine will be thirsty! Probably a gallon and a half an hour at its rated speed. If you plan on running it at a lower speed you will probably have to cut back on the relief pressures so the engine won't stall. I'd just run it at speed, get it done quicker, and deal with the fuel usage.

Oil temps will likely climb pretty high with that small of a hydraulic tank. Are you planning on splitting year round? If so I would probably suggest an oil with a higher viscosity than the standard AW32.

Nice build!

I am starting to lean toward the auto cycle

heres the fuel tank I am going to get 4.5 GALLON RED FUEL TANK W/FUEL SHUTOFF VALVE

I hope the tank will do most of the store bought splitters have about 1/2 the fluid cap of the pump

 

[TomSeller]

Concrete crusher. Nice.

 

[muddstopper]

Don't know anything about a dump valve can you explain

A dump valve diverts fluid from the rod end of cyl back to tank without the fluid having to flow thru the control valve. The reason for using one with high flow pumps is because of volume displacement. While the pump is rated for a certain flow, the actual flow when cyl retracts can actually be as much as twice the amount of oil that the pump is produceing. Just how much is determined by the dia of the rod.The Cyl rod takes up space in the cyl bore. While you might be pumping only 28gpm into the rod end of the cyl, the piston end is having to displace the 28gpm, plus the volume produce by the rod as it re-enters the cyl bore. Because of the rod volume, your 28gpm in to cyl can become 40+gpm coming out of the cyl. Normal splitter valves are usually only rated for 25gpm of flow, but have 40+ gpm trying to come back thru them. This creates a flow restricion that produces heat as well as slows down the travel speed of the cyl. The restriction of the valve can cause a fluid velocity increase that can cause oil foaming in the tank and possible cavitation at the pump when using low capacity hydraulic tanks. A dump valve works by allowing fluid from the control valve to enter the cyl for extend, when the rod retracts, the dump valve contains check. valves that stops flow from going back to the control valve and diverts the fluid straight back to tank. A dump vavle isnt always the answer to speeding up a hydraulic cyl. Actual port size in the cyl also need to be sized to accommodate the extra flow. A cyl with only 1/2in ports will see very little benefit of using a dump valve simply because the 1/2in port isnt large enough to handle the extra oil flow. A 3/4 in port is really only good for flows of around 30gpm. To get the maximum benefit of a dump valve when using a 28gpm pump, you really need to open the base port of the cyl up to at least a 7/8 dia which is not really a common size. The more common size would be 1in. I am not saying you cant push more oil thru a smaller port, but doing so will create un-neccessary heat

 

[mikefromnh]

Here's a link that sells dump valves and shows the plumbing.

Dump Valve

I'm not sure id spend the money on a new one but they show up fairly often on ebay. I paid $25 delivered for one rated at 60gpm with a manifold... Most ebay sellers don't understand sun hydraulics product codes.

ckgb-xcn or ckeb-xcn are I believe what splitez is selling as dump valves. You would then need a compatible manifold. Mine came with a HCN for the ckgb-xcn cartridge.
CKGB | Cartridges ｻ Directional ｻ Check | Sun Hydraulics

 

[perkins78]

So right or wrong here's what I did 1" ports it should help with the oil flow

 

[perkins78]

A dump valve diverts fluid from the rod end of cyl back to tank without the fluid having to flow thru the control valve. The reason for using one with high flow pumps is because of volume displacement. While the pump is rated for a certain flow, the actual flow when cyl retracts can actually be as much as twice the amount of oil that the pump is produceing. Just how much is determined by the dia of the rod.The Cyl rod takes up space in the cyl bore. While you might be pumping only 28gpm into the rod end of the cyl, the piston end is having to displace the 28gpm, plus the volume produce by the rod as it re-enters the cyl bore. Because of the rod volume, your 28gpm in to cyl can become 40+gpm coming out of the cyl. Normal splitter valves are usually only rated for 25gpm of flow, but have 40+ gpm trying to come back thru them. This creates a flow restricion that produces heat as well as slows down the travel speed of the cyl. The restriction of the valve can cause a fluid velocity increase that can cause oil foaming in the tank and possible cavitation at the pump when using low capacity hydraulic tanks. A dump valve works by allowing fluid from the control valve to enter the cyl for extend, when the rod retracts, the dump valve contains check. valves that stops flow from going back to the control valve and diverts the fluid straight back to tank. A dump vavle isnt always the answer to speeding up a hydraulic cyl. Actual port size in the cyl also need to be sized to accommodate the extra flow. A cyl with only 1/2in ports will see very little benefit of using a dump valve simply because the 1/2in port isnt large enough to handle the extra oil flow. A 3/4 in port is really only good for flows of around 30gpm. To get the maximum benefit of a dump valve when using a 28gpm pump, you really need to open the base port of the cyl up to at least a 7/8 dia which is not really a common size. The more common size would be 1in. I am not saying you cant push more oil thru a smaller port, but doing so will create un-neccessary heat

Thank you that's a very good explanation.

 

[perkins78]

Here's a link that sells dump valves and shows the plumbing.

Dump Valve

I'm not sure id spend the money on a new one but they show up fairly often on ebay. I paid $25 delivered for one rated at 60gpm with a manifold... Most ebay sellers don't understand sun hydraulics product codes.

ckgb-xcn or ckeb-xcn are I believe what splitez is selling as dump valves. You would then need a compatible manifold. Mine came with a HCN for the ckgb-xcn cartridge.
CKGB | Cartridges ｻ Directional ｻ Check | Sun Hydraulics

I'm on it will have to get one. One more question I have a truck repair place close by and they have a yard full old dump trucks, garbage trucks, crane trucks would this Pilot Operated Check Valves (dump valves ) be used on anything you can think of

 

[LD1]

What is the green line between the two valves?

 

[LD1]

And how big is the resivoir

 

[perkins78]

What is the green line between the two valves?

The green lines are return to the tank red are pressure. Out of the main valve the green line is the outlet that returns to the tank the red is the power beyond. The way I understand it in neutral fluid flows through the pb port. And the outlet which is marked green only flows if the relief lets it bypass I'm not 100 % so I wanted to let you all look at what i'm thinking. The tank I already have is 20 gal Got it at junk yard came off a big dump truck.