f c. To find shim thickness “B” use the following formula: Middle driven pinion gear shim thickness f g + h i j – 0.05 Where: f = a numeral (usually a decimal number) on the bearing housing is either added to or subtracted from “77.5” NOTE: After replacing any part in the middle driven pinion gear assembly, the overall length of the assembly will change. Therefore, be sure to measure distance f to select the correct mid- dle driven pinion gear shim thickness.
f g = a numeral (usually a decimal number) on the middle driven pinion gear is either added to or subtracted from “49.0” h = a numeral (usually a decimal number) on the middle driven pinion gear is either added to or subtracted from “80.5” i = a numeral (usually a decimal number) on the left crankcase specifies a thickness of “99.98” j = a numeral (usually a decimal number) on the right crankcase specifies a thickness of “8.12” Example: 1) If the bearing housing is marked “+03”, ..... f is 77.53 2) If the driven pinion gear is marked “+0”, ..... g is 49.0 3) If the driven pinion gear is marked “–10”, ..... h is 80.40 4) If the left crankcase is marked “99.99”, .....
i is 99.99 5) If the right crankcase is marked “8.17”, ..... j is 8.17 6) Therefore, the shim thickness is 0.72 mm. “B” = 77.53 – 49.0 + 80.40 – 99.99 – 8.17 – 0.05 = 0.72 g h i 4 - 98 MIDDLE GEAR ENG