Oberdorfer Bronze Gear Pump 1/2" 6.6 GPM 1 HP, 3 Ø # N994RJN98. Oberdorfer close coupled oil and diesel fuel transfer all bronze positive displacement 1/2" 6.6 GPM rotary helical gear pump with carbon bearings and relief valve close coupled to 1 HP 230/460/3/60 1140 RPM motor model # N994RJN98-K