Fabco 520-85-1 or 520851 is an adapter going from SAE BB (15T) to SAE A (9T), used to join equipment built to one of those SAE mounting patterns to the other. The mounting pilot is what centers a pump on its drive, so alignment matters at this joint: poor centering tends to show up as shaft runout, vibration and early bearing wear. Check the pump flange and spline against the BB and A call-outs in the part name before you order. A genuine Fabco part from Pro Gear and Transmission. Call us if you want help confirming the match for your application.
Features
Adapter from SAE BB (15T) to SAE A (9T)
Fabco part number 520-85-1
Pilot centering keeps the pump shaft running true
