KAYABA marine windlass/mooring winch hydraulic motor series:
MRHV-3150-23-TPNSV
MRH2-3150-9-PPNCYAV
MRH2-3150-9-PPNV
MRH2-3150-1-Spvsv
MRH2-3150-1-TWH
MRH2-3150-3-TPNCYAVXSV
MRH2-3150-7-TFPNCYAV
MRH2-3150-9-PPV
MRH2-3150-9-SPV
MRH2-3150-12-TFPNCYAVX
MRH2-3150-34-TPNCYAVSV
MRH2-3150-P
MRH2-3150-T
MRH2-3150-1-SPVSV  
MRH-3150-PNYA
MRH-3150-PWN-2
MRH-3150-SW
MRH-3150-T
MRHV-3150-TPNSV
MRHV-3150-T
MRHV-3150-23-TPNSV
MHHV-4400-1-P
MRH2-750-PW
MRH-500-PWN
MRH-750
MRH-750-TWHG-1
MRH2-1500
MRH2-1500TWNCYAG
MRH-1500
MRH2-2200
MRH-2200
MRH2-4400
MRH-4400
MRH2-4400
MRH2-4400-9-PWN
MRHV-4400-23-TPNSV
MRH2-4400-TW
MRH-3150-PW
MRH2-3150-1-Spvsv
MRHV-3150-23-TPNSV
MRH2-2200-SW
MRH2-4400-1-PW
MRH-750-TW
MRH-4400-PW
MRH-1500-T

Kayaba control block series for MRH Series hydraulic motor:

FDM04AAS
FDS06ACLSE
FDM08ACS
FDM12CBS3
FDS12ACS
FDM12ACSE

Low speed,high torque output hydraulic motors
Rugged,reliable design provides extended life and excellent efficiency.

Large main bearings assure long life and allow heavy side load capacity.
Speed infinitely variable and torque constant over the entire speed range.
Many standard model offering up to 2696N.m torque.

Several dimension of shaft and porting available.
Several drain port location to ease mounting.
High pressure shaft seal options.
KYB's radial piston design achieves extremely high torque in all speed ranges.Pressurized oil exerts a force that is transmitted from the piston through the connecting rod to the camshaft.

In the valve housing,a distributor valve rotates with the camshaft and directs the oil into the cylinders.
For smooth rotation,multiple cylinders are under simultaneous pressure.
The multi displacement motor shown above,uses a shifting piston inside the cam to change displacement.