muddstopper
Veteran Member
You havent explained your plans very well, but I will throw in my .02cents anyways. My first suggestion is forget the priority flow controls and divider valves. get yourself a double or even a tripple pump and mount it on a gear box to run off your pto. I will guess you plan on having a conveyor to feed the logs, as well as maybe a conveyor to move the split wood. You can run both off a smaller pump. Depending on what motor you plan on using for your saw, it will need a good amount of flow and pressure to have any real cutting power. This can be ran off the second pump, and the third pump can run the splitter portion. Use a unloader valve to connect the oil supply thru a powerbeyond on the saw CV to feed oil to the splitter cyl to speed up cycle times. This will not effect saw function, but will speed up the splitting cyl. You can set the unloading pressure to where if you need highpressure for splitting, the saw fluid will dump to tank and only the splitting pump is supplying oil to the splitting cyl to reduce hp requirements of your tractor. The control valve for the saw can be connected to a sequence valve so that when the saw is activated, the log clamp will close and the saw lift cyl will extend, lowering the saw into the wood and the saw will start running. One lever working all three functions.
You didnt say or I missed it, what kind of motor do you plan to use for the saw. And to answer one of your questions, you will need a motor spool control valve or your motor wont last long. If you need the saw motor to stop fast, then add a brake valve to the saw motor. For chain speed you dont want to pick a fast running motor, you want to pick a motor that has lots of torque. Bigger motors have more torque than the smaller ones. Use the bigger motor, even tho it requires more oil to get the same speed of the smaller motors. Cutting speed isnt measured in rpms at the motor shaft. Its measured by how fast the chain moves in linear feet persec. This is a factor of chain pitch, sprocket tooth count, and rpms of the sprocket. Your chain speed can be increased simply by going to a larger sprocket. This is why you need the bigger cuin motor with the most torque to saw the wood. I would also forget trying to find a f11 hyd motor. Yes they turn super rpms, but what everybody overlooks is that they need massive amounts of pressure to maintain that speed while cutting. They dont have the torque without that high pressure and will stall in a cut. Yes those motors are used in all kinds of forestry cutting equipment, but those machines usually have 4800-5000psi hyd systems. You start running those kinds of pressures off you 80hp tractor, you are going to run out of hpower. If you insist on using a f11 type motor, I have a new one I will sell you for $500.
You didnt say or I missed it, what kind of motor do you plan to use for the saw. And to answer one of your questions, you will need a motor spool control valve or your motor wont last long. If you need the saw motor to stop fast, then add a brake valve to the saw motor. For chain speed you dont want to pick a fast running motor, you want to pick a motor that has lots of torque. Bigger motors have more torque than the smaller ones. Use the bigger motor, even tho it requires more oil to get the same speed of the smaller motors. Cutting speed isnt measured in rpms at the motor shaft. Its measured by how fast the chain moves in linear feet persec. This is a factor of chain pitch, sprocket tooth count, and rpms of the sprocket. Your chain speed can be increased simply by going to a larger sprocket. This is why you need the bigger cuin motor with the most torque to saw the wood. I would also forget trying to find a f11 hyd motor. Yes they turn super rpms, but what everybody overlooks is that they need massive amounts of pressure to maintain that speed while cutting. They dont have the torque without that high pressure and will stall in a cut. Yes those motors are used in all kinds of forestry cutting equipment, but those machines usually have 4800-5000psi hyd systems. You start running those kinds of pressures off you 80hp tractor, you are going to run out of hpower. If you insist on using a f11 type motor, I have a new one I will sell you for $500.
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