A10VSO28DFR/31L-PKC61N00 REXROTH REPLACEMENT, PISTON PUMP, 1.71 IN3 DISPLACEMENT, COUNTER-CLOCKWISE ROTATION, 7/8" KEYED SHAFT, 1/4" KEY, SAE 'B' 2-BOLT MOUNTING FLANGE, REAR PORTS, -20 CODE 61 SUCTION FLANGE, -12 CODE 61 PRESSURE FLANGE, (2) #8 O-RING CASE DRAIN PORTS, DFR PRESSURE & FLOW CONTROL DEVICE, #4 SAE CONTROL DEVICE PORT, 4000 PSI CONTINUOUS OPERATING PRESSURE, 5100 PSI PEAK, 22.2 GPM MAXIMUM, 100% FACTORY TESTED, A10VS028DFR/31L-PKC61N00.