Flow control

[J_J]

I have thought about that, but there is a possibility of sending fluid through the valve backwards, if you moved the valve lever the wrong way. Safest way would be to dump the hyd motor fluid directly sump/tank. I am not so sure that the additional flow control valve is really necessary.

Are you sure you do not want to use the remote valve for operation of the hyd motor. For speed control, an adjustable needle valve in the motor circuit can control speed. Less money.

You could use the remote valve to set any speed, You adapt an adjustable rod hooked around the remote lever and adjusted for the speed you want, for much less money. Just trying to find easier ways of setting speed.

 

[luscsmith]

Would the needle type restrictor cause the PRV to open and heat the fluid?

Scott

 

[J_J]

The flow restrictor will cause some heat, but the relief will only activate if the hyd motor stalls. Then it would only relieve until the stall is fixed, or you put the lever in neutral.

 

[luscsmith]

"You could use the remote valve to set any speed, You adapt an adjustable rod hooked around the remote lever and adjusted for the speed you want, for much less money. Just trying to find easier ways of setting speed."


Will my remote act as a throttle not just on-off?

Scott

 

[J_J]

If you want, do this test. Just plug your hyd motor into your remotes and play with the lever some.

If the remote valve is sized for the flow, You should be able to feather, and run any speed on the hyd motor. You should have fwd and reverse. Do you know the max speed of your hyd motor?

 

[luscsmith]

I do not know the speed, but it is 12GPM @ 1500PSI.

Thank you, Scott

 

[J_J]

You will have to reset the relief on your remote valve to about 1450 psi to protect the motor, or a relief valve across the input and output of the hyd motor, set to about 1450 psi..

 

[luscsmith]

Thank you very much JJ, I will pick up the rock picker this weekend if weather is good. I will then start the process of making it opperate with my tractor.

Again thanks for your knowledge, Scott

 

[oldnslo]

Scott,

I may have missed this in an earlier post but, is the hydraulic system on this vehicle going to be open center (fixed displacement pump) or Closed Center (variable volume pump). The type of circuit you have will dictate what valves work or better or best.

Using the directional valve will not keep the motor steady if the load changes unless you are using a Closed Center system with Load sense.


ALL flow controls create heat by design. Since this is a motor application the heat will be continuous. Have you considered running this function with the PTO? This would eliminate the concerns of heat, return oil, motor control with other functions running etc... Speed could be adjusted by engine RPM when or if neccessary.

Roy

 

[luscsmith]

Scott,

I may have missed this in an earlier post but, is the hydraulic system on this vehicle going to be open center (fixed displacement pump) or Closed Center (variable volume pump). The type of circuit you have will dictate what valves work or better or best.

Using the directional valve will not keep the motor steady if the load changes unless you are using a Closed Center system with Load sense.


ALL flow controls create heat by design. Since this is a motor application the heat will be continuous. Have you considered running this function with the PTO? This would eliminate the concerns of heat, return oil, motor control with other functions running etc... Speed could be adjusted by engine RPM when or if neccessary.

Roy

Roy, I do not know about the motor, I will know more after I pick up the attachment.
Yes I have thought about running it off of the PTO but that would be more added cost. A PTO pump and tank are very much still in the equation, whatever it takes to make it work correctly.

Thanks, Scott