A German-made reciprocating triplex plunger pump.

Aluminum 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 forged brass 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 www.P65Warnings.ca.gov

  • P536 Exploded View
  • P536 Parts List
  • P536 Torque Specifications
  • P536 Technical Drawing
  • Giant Industries Limited Warranty
  • P536 Installation Instructions
  • P536 Repair Instructions
  • Troubleshooting Guide


U.S. Metric
1450 PSI
Max Flow 26.4 GPM 100 L/min
Max Discharge Pressure 1740 PSI 120 bar
Plunger Diameter 1.42″ 36 mm
Stroke 0.94″ 24 mm
Max Temp 104 °F 40 °C
Crankshaft Diameter 1.18″ 30 mm
Key Width 0.32″ 8 mm
Weight 93 lbs. 42 kg
Crankcase Capacity 68 fl. oz. 2.0 L
NPSHR 27.9 ft. of Head 8.5 mWs
Inlet Ports (2) 1″ BSP
Discharge Ports (2) 3/4″ BSP
Shaft Rotation Top of Pulley Towards Manifold
Shaft Mounting Either Side
Key Component Material
Manifold Forged Brass
Plungers Solid Ceramic Oxide
Valves High Grade Stainless Steel
Seals Nitrile With Fabric Reinforcing
Gear End Aluminum

Click the image to enlarge


RPM GPM 1000 PSI 1200 PSI 1500 PSI 1740 PSI
920 16.7 11.5 13.8 17.3 20.0
1050 19.1 13.2 15.8 19.8 22.9
1185 21.6 14.9 17.9 22.4 25.9
1315 23.9 16.5 19.8 24.7 28.7
1450 26.4 18.2 21.9 27.3 31.7

Horsepower Requirements

The ratings shown are the power requirements for the pump. Gas engine power outputs must be approximately twice the pump power requirements shown above.

We recommend a 1.15 service factor be specified when selecting an electric motor as the power source. To compute specific pump horsepower requirements use the following formulas:
Electric HP = (GPM X PSI)/1450
Gas HP = (GPM X PSI)/1100

*Engine power varies based on horizontal or vertical orientation, as well as by makes and models from each manufacturer.


Plunger Packing Kit – Part #09753
21 08492 O-Ring 3
22 07144 Sleeve 6
23 04248 Grooved Seal 3
23A 04249 Scraper 3
Valve Assembly Kit – Part #09754
33 12057 O-Ring 6
46 04254 Valve Assembly 6
Oil Seal Kit – Part #09755
19 04860 Oil Seal 3

Repair Kits Available

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.

Service & Repair

Giant provides service on each pump and accessory that we sell. Many basic repair procedures are covered in the Giant repair manual. For all other questions on service or repair needs please contact your local Giant distributor.