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 cast bronze 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

  • MP4135 Exploded View
  • MP4135 Parts List
  • MP4135 Torque Specifications
  • MP4135 Technical Drawing
  • Giant Industries Limited Warranty
  • MP4135 Installation Instructions
  • MP4135 Repair Instructions
  • Troubleshooting Guide


U.S. Metric
Flow 13.5 GPM 51.2 L/min
Maximum Discharge Pressure 1885 PSI 130 bar
Crankshaft Speed 1100 RPM
Power Consumption 18.2 HP 13.6 kW
Maximum Inlet Pressure 145 PSI 10 bar
Max Temp 160 °F 70 °C
Plunger Diameter 1.10″ 28 mm
Stroke 1.02″ 26 mm
Crankshaft Diameter 28 mm
Crankshaft Rotation Top of Pulley Towards Manifold
Crankshaft Mounting Either Side
Inlet Ports (2) 1″ NPT
Discharge Ports (2) 3/4″ NPT
Crankcase Oil Capacity 33.8 fl. oz. 1.0 L
Weight 66 lbs. 31 kg
NPSH Required 29.5 Ft. of Head 9 mWs
Key Component Material
Manifold Aluminum Bronze
Plungers Solid Ceramic Oxide
Valves High Grade Stainless Steel
Seals Nitrile With Fabric Reinforcing
Gear End Spheroidal Cast Iron

Click the image to enlarge


RPM GPM 500 PSI 1000 PSI 1500 PSI 1900 PSI*
660 8.1 2.8 5.6 8.4 10.6
715 8.8 3.0 6.1 9.1 11.5
900 11.0 3.8 7.6 11.4 14.4
1030 12.6 4.3 8.7 13.0 16.5
1100 13.5 4.7 9.3 14.0 17.7

*Intermittent duty only

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 #09665
35B 05687 V-Sleeve 3
40 05687 V-Sleeve 3
42B 07354 O-Ring, Tension Plug 3
Inlet Valve Assembly Kit – Part #09809
42B 07354 O-Ring, Tension Plug 3
44 07280 Valve Seat 6
44A 07281 O-Ring, Valve Seat 6
45 06791-0100 Valve Plate 6
46 07283 Valve Spring, Discharge 3
46A 07283 Valve Spring, Inlet 3
48A 07332 O-Ring, Tension Plug 3
53 07332 O-Ring 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.