Accelerating Pump Assembly

Lubricate pump shaft with suitable lubricant (light grease) when installing in bowl cover. Make certain that pump check balls are not interchanged. Inlet check ball is aluminum, discharge check ball is steel.

NOTE: Some models may have a two-piece pump plunger assembly in place of an inlet check ball.

Fig 1: ROCHESTER 2GV AIR HORN ASSEMBLY

Courtesy of GENERAL MOTORS COMPANY

Fig 2: ROCHESTER 2-BARREL CARBURETOR (AUTO CHOKE ON AIR HORN)

Courtesy of GENERAL MOTORS COMPANY