Hydraulic Motor from Aux Hydraulics?

[Aquaele]

Thank you all once again for the input, and especially Kennyd for the excelent rescources for tech data. If I get the time to play with it over the winter I will post some pictures.

 

[J_J]

Power-Trac has this cement mixer for one of the smaller PT. I believe the output of the PTO pump is about 8 gpm. It might work for you, small and light weight.They have two sizes. A 4 cu ft, and a 6 cu ft

 

[radman1]

As others have stated, you need a much lower displacement motor if you
are going direct drive.

I think you meant to say he will need a larger displacement motor. Larger displacement will decrease the rpm of the output shaft for the same flow. Larger displacement will also increase the torque.

 

[dfkrug]

I think you meant to say he will need a larger displacement motor. Larger displacement will decrease the rpm of the output shaft for the same flow. Larger displacement will also increase the torque.

You are correct, I stated it backwards. Although generally torque goes
up with displacement, that does not have to be true. And some common
series (Char-Lynn S for example) tend to be lower pressure/lower torque
vs some other series/brands of the same displacement (E.G. White HB).
I am trying to find a deal on a very high torque motor displacing about 8
ci and a moderate torque motor of 8-10ci. The latter for a concrete mixer,
the former for another hyd PHD. Torque output is also based on the
internal design of the motor.

 

[flusher]

Yes and no. The hydraulic control lever was not designed as a variable flow control. In large part it is either on or off. However, if you move the lever just sligtly, a little flow will occur, move it a little more and more flow. However, it is difficult to maintain the same little movement/ flow without a human hand on the lever. It would be best to open the hydraulic control lever fully and then use an external flow control valve. Most CUTs do not have a detent on the hydraulic lever to maintain constant flow. (Common on ag tractors. Variable flow is also common on ag tractors.) Thus you would have to tie back the lever to the open position. If used a lot, the hydraulic fluid could be come too hot.

Flow control could be like the following:

Surplus Center Item Detail

I agree with what you say about flow control.

You can get detent adapters for the usual bang-bang control valves on tractor remotes that will hold the valve in the ON position. I have one for the Diniol valves on my Mahindra 5525

Need to install it one of these days. Plan to eventually get a hydraulic PHD that mounts on the FEL bucket.