The ATP Hydraulic Pump Adaptor mounts onto any B3Z or B4Z water pump taking the place of the Outer Bearing Cap (116-S19914). This adaptor includes a Hydraulic Coupling (116-S30636) which is 7/8″ 13 Tooth Splined by 1 1/8″, 1/4″ Keyway and directly couples the shaft of the water pump to the shaft of the Hydraulic Motor.
If trimming an existing shaft to accommodate this adapter, final shaft length should be 1-13/16th” from the bearing itself, NOT the bearing cap.
– NOTE: Hydraulic Motor for use with this Adaptor needs to have an output shaft that is 7/8″ 13 Tooth Spline and 2 Bolt, SAE B mounting. The other specifications of the Hydraulic motor will depend on the specifications of Hydraulic Pump as well as engine RPM. Check out our MK20 Hydraulic Motors for more information.