EBS00370 SELECTING MIDDLE DRIVE AND DRIVEN GEAR SHIMS When the drive and driven gear, bearing hous- ing assembly and/or crankcase replaced, be sure to adjust the gear shim 1 , 2 . 1. Select: middle drive gear shim 1 middle driven gear shim 2 MMM M M MMM M M MMM M M MMM M M MMM M M MMM M MMM a. Position middle drive and driven gear by using shims 1 and 2 with their respective thickness calculated from information marked on crankcase, bearing housing and drive gear end. 1 Shim thickness “A” 2 Shim thickness “B” b. To find shim thickness “A” use following for- mula: 1 Middle drive pinion gear shim thickness e + d b c a 2 Where:
a = a numeral (usually a decimal number) on the bearing housing is either added to or subtracted from “0.6” b = 17.0 c = 55.0 d = a numeral (usually a decimal number) on the right crankcase specifies a thickness of “65.0” a d 4 - 96 MIDDLE GEAR ENG