Lightweight, highly reliable, maintenance friendly, easy availability of spares at cheaper prices and service back up.
Cooler working temperature, thereby extending the life of pumps in tropical climates. And no sweating on coupling.
Ease of pump or motor displacement rings for easy change out in field (I sometimes ship out and must repair on site).
1) Higher speed for radial piston motor 2) Higher initial mechanical efficiency for axial piston motor.
It would be to use motors in agriculture in applications such as grass mowers, silage wagons, lime spreaders.
My idea and my need is to find small Hydraulic motor to replace air tools in the meat industries, that allow power, constant torque, noise level at zero db, flexibility, reduced electricity cost.
I would see a Hydraulic motor fitted at each wheel of a vehicle, a car, and the supplying pump would be driven by an electric (battery operated motor).
To make it safe and usable for a lots of things but the safe part is very important.
Low tech, and available to everyone.
Light weight, low wear, high torque, non corrosive.
Much better efficiency - today's normal is about 85%.
A better lead time and availability.
Better contamination control
Lower operating temperature
Mainly the torque/speed ratings are theoretical numbers. Decreasing to about 85% for maximum will just get you to the starting gate. For maximum life, oversizing to a substantial amount at much lower than rated pressure is recommended.
Make sure the control valves can allow enough oil to feed the motor.
Select a motor which can be available ex-stock with any dealer. If it is non-standard, your down time the machine will be too high.
Hyd motors must be labeled to the proper amount of pressure it can put out and the amount of flow in gallons per unit.
Ask supplier what the optimum operating conditions are for longevity.
Check the wear surfaces to see if they are actually functional.
Always keep good, clean hydraulic oil in the units.
Correctly match Hyd. motor to drive motor hp
Speed volume and torque required.