AR403-GR3/4-GCI Diaphragm Pump, Gear box & Regulator


* This unit ships in 3-5 days

The AR403-GR3/4-GCI is a medium pressure diaphragm pump that is popular in the lawn care and pest control industry. The AR403-GR3/4-GCI assembly is the pump, gearbox and control unit. The gear box attached to engines with a 3/4" keyed shaft. 

The AR403 replaces the Hypro D403. 

The AR403 is a medium pressure, three diaphragm pump with a max flow of 9.2 GPM. 

  • Parts in contact with pumped liquids in plastic-coated aluminium and body in aluminium
  • Diaphragms in NBR, Desmopan or Viton
  • Seals in NBR or Viton
  • Die-cast casing with oil-immersed mechanism and clear plastic tank for visual level checking
  • Pistons with ring for a more efficient “oil cushion” system to protect the diaphragm
  • New-design diaphragm cut-out system to prevent contact tearing even in heavy-duty operating conditions
  • Spherical sector profile valves for lower flow resistance and improved volumetric efficiency

Common replacement parts for the AR403 are as follows:

Diaphragm Kits:
AR43289 - Blueflex
AR43287 - Desmopan

Valve Kits:
AR2388 - Valves

O-Ring Kits:
AR2389 - O-Rings

AR64516 - Oil

AR403 Specifications

Max GPM: 9.2 GPM

Max PSI: 580 PSI

Max RPM: 550 RPM

Max Fluid Temp: 140 F

Diaphragm Material: Desmopan

Inlet Barb: 1"

Outlet: 1/2"

Weight: 34 Lbs

Oil Capacity: 32 oz

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