50 HP High Ratio Gearbox 50HP HIGH RATIO ROLLER BEARING GEARBOX Part No. B2664 - 1:2.83 HIGH RATIO INCREASE SPECIFICATIONS A = 135mm (5.3") SPARE PARTS PART No. DESCRIPTION SIZE B2954 LOWER OIL SEAL 40 x 55 x 8 B3703 INPUT OIL SEAL 35 x 52 x 8   Taper Roller Bearing Input Shaft Taper Roller Bearing Output Shaft 1 3/8" x 6 spline Input Shaft Output Shaft and Hub dimensions same as B2666 gearbox Standard Rotation