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ENG
MIDDLE GEAR
Example:
1) If the bearing housing is marked “+02”,
......
a
is 7.52,
2)
b
is 17
3)
c
is 55
4) If the crankcase (left) is marked “64.98”,
......
d
is 64.98.
5) Therefore, the shim thickness is 0.50 mm.
A = 7.52 + 64.98 – 17 – 55
= 0.50
6) Round off hundredths digit and select
appropriate shim(s).
In the example above, the calculated shim
thickness is 0.50 mm. The chart instructs
you, however, to round off 0 to 0.
Shims are supplied in the following thickness.
Hundredths
Round value
0, 1, 2
0
3, 4, 5, 6, 7
5
8, 9
10
Middle drive pinion gear shim
Thickness (mm)
0.10
0.30
0.15
0.40
0.20
0.50
c. To find shim thickness “B” use the following
formula:
Where:
e
= a numeral (usually a decimal number) on
the bearing housing is either added to or
subtracted from “76”.
f
= a numeral (usually a decimal number) on
the middle driven pinion gear is either
added to or subtracted from “60”.
Middle driven pinion gear shim thickness
“B” =
e
–
f
+
g
–
h
+
i
– 0.05
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