The AR1639 gear box is the ideal component requiring little maintenance and providing the smooth operation of sprayer pumps. The design optimizes the performance of most medium- to large-size sprayers for a variety of applications. This gearbox supports a wide spectrum of pressures and flows for suspensions and slurries useful for standard 8 to 18 HP gas engines with one-inch shafts.

6:1 gear box designed to mount Annovi Reverberi AR50, AR503, AR813, and AR1064 diaphragm pumps to standard 8-18 HP gas engines with a 1" keyed shaft. 

• Fits pump models: AR50-SP, AR503-SP, AR813-C/SP, AR1064-C-SP
• Gear ratio: 6 to 1
• Engine Size: 8-18 hp with 1" solid keyed shaft
• Weight: 8.5 lbs