CAT Pumps Gearbox 51G1 with 7 frame plunger pump

CAT Pumps Gearbox 51G1 Pump
BrandCAT Pumps
Model Code Gearbox 51G1
Model Info


  • Triplex plunger design
  • Lubricated low-pressure and hi-pressure seals or v-packings
  • Oil bath crankcase
  • Close tolerance concentricity of the ceramic plunger
  • Precision design 304 stainless steel valves and seats
  • Forged brass manifold
  • Die cast aluminum crankcase
  • Chrome-moly crankshaft
  • Oversized crankshaft bearings


  • Flow: 4.8 GPM
  • Pressure range: 100 to 3000 PSI
  • Inlet Pressure range: Flooded to 60 PSI
  • RPM: 1765 RPM
  • Bore: 0.630"
  • Stroke: 0.728"
  • Crankcase capacity: 25 oz.
  • Maximum liquid temperature: 160°F
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