I feel for you on the shed issue. Mine didn't survive last winter and I'm still figuring out what to do.
Hydraulic motor torque is dependant on the pressure available and the displacement of the motor. It's fairly consistent throughout the rpm range.
From this, comes this formula.
Relationship between displacement and torque of a hydraulic motor
T = D x PSI ÷ 24π
T is torque in foot-lbs; D is displacement in cubic inches per revolution; PSI is pressure difference across motor; π = 3.14
Note: Flow is not mentioned. At zero rpm there is minimal flow for the internal clearances, but full pressure can be available, and so can full torque.
Hydraulic motor torque is dependant on the pressure available and the displacement of the motor. It's fairly consistent throughout the rpm range.
From this, comes this formula.
Relationship between displacement and torque of a hydraulic motor
T = D x PSI ÷ 24π
T is torque in foot-lbs; D is displacement in cubic inches per revolution; PSI is pressure difference across motor; π = 3.14
Note: Flow is not mentioned. At zero rpm there is minimal flow for the internal clearances, but full pressure can be available, and so can full torque.