Waukesha Cherry-Burrell Universal 2 Series Positive Displacement Pump with Integral Speed Reducer (ISR). Pump model 180-U2, serial 432039-07. Displacement per revolution: 0.38 gallons. Nominal capacity to 230 GPM. Maximum pressure: 450 PSI. W-CB ISR Gear Reducing Drive: model 239, serial 432039, ratio: 5.3571. Sterling Electric motor: 20 HP, 208-230/460V, 54-49/24.5 amps, 1760 RPM, 60 Hz, 3-phase, TEFC, 245TC Frame. Final RPM: 328.5 (124 GPM). Ports: 3 in. S-Line. Overall dimensions: 4 ft. 6 in. L x 1 ft. 8 in. W x 2 ft. 3 in. H.