4 - 83ENGMIDDLE GEARExample:1) If the bearing housing is marked “+04”,...... a is 10.54.2) b is 553) If the crankcase (right) is marked “66.03”,...... c is 66.03.4) Therefore, the shim thickness is 0.47 mm.A = 66.03 – 10.54 – 55= 0.495) Round off hundredths digit and selectappropriate shim(s).In the example above, the calculated shimthickness is 0.49 mm. The chart instructsyou, however, to round off 9 to 10.Shims are supplied in the following thickness.Hundredths Round value0, 1, 2 03, 4, 5, 6, 7 58, 9 10Middle drive pinion gear shimThickness (mm)0.10 0.300.15 0.400.20 0.50 To find shim thickness “B” use the followingformula:Middle driven pinion gear shimthickness:“B” = d – e + f – g – 0.05
