Posted by Bob on February 28, 2018 at 09:23:45 from (64.255.159.199):
In Reply to: Hydraulic motor posted by pat sublett on February 28, 2018 at 07:58:47:
Quoting Removed, click Modern View to see
Brendon, if the motor is powered from the hydraulic remote ports on a tractor, another issue can come up.
The return flow from the valves for the remote couplings may NOT be just getting dumped in the tank/sump/rearend of the tractor, depending upon the make and model.
I may get forced trough a filter and/or an oil cooler and may be added to the flow in the main pump "charge" circuit, any and all of which can build significant backpressure.
I say if the motor has provision for a case drain USE IT!
Also, (IIRC) some motor manufacturers want the pump to be oriented at or near the top, keeping the pump case full of pressurized oil to lube0 internal parts.bearings, etc..
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