This repair pin is used if your Rochester Quadrajet carburetor airhorn castings accelerator pump arm boss is snapped. This pin has a serrated shaft which is pressed into the inner boss, allowing the pump arm to function correctly. Saves you the expense of replacing the entire airhorn casting. Easy to install.
Quantity: 1 repair pin
Serrated shaft diameter: .100"
Inner step diameter: .181"
Overall length: .430"
1- Remove pump arm and carefully remove pin from casting.
2- Enlarge accelerator pump arm pivot hole to fit over machined step on repair fitting. Drill arm pivot hole to .187" (3/16").
3- Debur drilled hole with 3/8" drill, turning drill by hand until side of arm is smooth and burr free.
4- Ensure pump arm rotates smoothly on repair fitting.
5- Apply red Loctite thread locker to repair fitting splines, be careful to not get thread locker onto arm pivot surface.
6- Carefully install repair fiting (w/ pump arm). Serrated pin is carefully pressed straight into existing pivot pin hole. Allow slight (pump arm) side clearance for smooth operation.
#3133 Clip on Accelerator Pump Linkage, Allows easier air horn removal. Ensuring that the pump repair fitting does not need to be removed in the future.
#4252 Retainer Pins for retaining #3133 linkage.