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A German-made reciprocating triplex plunger pump.

Spheroidal cast iron crankcase with sight glass and vented dipstick; forged, through-hardened, ground and polished crankshaft; bronze connecting rods; hardened stainless steel plunger bases; solid ceramic plungers; nitrile seals with fabric reinforcing; stainless steel valves and machined stainless steel manifold.

WARNING: This product might contain a chemical known to the State of California to cause cancer, and birth defects or other reproductive harm. For more information go to

Specification US Metric
Flow14.2 GPM53.6 L/min
Maximum Discharge Pressure4000 PSI275 bar
Crankshaft Speed1000 RPM
Power39.2 HP29.2 KW
Max Temperature140 °F60 °C
Inlet Port Size(2) 1-1/4" BSP
Discharge Port Size(2) 1" BSP
Plunger Diameter0.95 in.24 mm
Stroke1.65 in.42 mm
Maximum Inlet Pressure145 PSI10 bar
Crankshaft Diameter1.38 in.35 mm
Crankshaft RotationTop of Pulley Towards Manifold
Crankshaft MountingEither Side
Crankcase Oil Capacity US118 fl. oz. 3.5 L
Weight119 lbs.54 kg
Manifold Material Stainless Steel
Crankcase Material Spheroidal Cast Iron
Plunger Material Solid Ceramic Oxide
Valve Material Stainless Steel
Seal Material Nitrile with Fabric Reinforcing
The repair kits listed to the right are available for this pump. If you need further information about these repair kits, or have questions about other specific parts for your pump, please contact you local Giant distributor or contact Giant customer service.
Plunger Packing Kit – Part #09459-0056
36 04842 Grooved Ring 3
38 07140-0006 O-Ring 3
38A 04835 Support Ring 3
39 12055-0006 O-Ring 3
39A 04837 Support Ring 3
40 07685 Spiral Ring 6
40A 04381 Guide Ring 3
40C 07718 Sleeve, Teflon 3
Valve Assembly Kit – Part #09196-0006
44A 07150-0006 O-Ring 6
44B 04834 Support Ring 3
46A 07064 Valve Seat 3
46B 07063 Valve Plate 3
46C 07062-0100 Valve Spring 3
Oil Seal Kit – Part #09577
31 07133 Oil Seal 3

Horsepower Specifications

RPM GPM 2500 PSI 3000 PSI 3500 PSI 4000 PSI
500 7.1 12.2 14.6 17.0 19.4
640 9.0 15.6 18.7 21.8 24.9
750 10.6 18.2 21.9 25.5 29.2
805 11.4 19.6 23.5 27.4 31.3
865 12.2 21.0 25.2 29.4 33.7
940 13.3 22.8 27.4 32.0 36.6
1000 14.2 24.5 29.4 34.3 39.2

Images Open in new Window/Tab

  • Dimensional Drawing (Side) Open
  • Dimensional Drawing (Front) Open
  • LP301A-0056 Exploded View
  • LP301A-0056 Parts List


Documents open in new window/tab.

  • Pump Assembly Instructions
  • Giant Industries Limited Warranty
  • LP301A-0056 Installation Instructions
  • LP301A-0056 Repair Instructions
  • Troubleshooting Guide

Sample Pump

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For 50 years, Giant Pumps has offered the most dependable positive displacement high-pressure triplex pumps available. Designed and built to the highest quality standards, customers count on Giant Pumps products to keep their equipment running. Every design detail of Giant Pumps products is optimized for long-life and reliable performance, making Giant Pumps the most trusted name in high-pressure pumps and systems.

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