4 - 101
ENG
MIDDLE GEAR
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 right crankcase specifies a thickness
of “99.98”
j
= a numeral (usually a decimal number) on
the left 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 “+02”,
.....
g
is 49.02
3) If the driven pinion gear is marked “+02”,
.....
h
is 80.52
4) If the right crankcase is marked “99.98”,
.....
i
is 99.98
5) If the left crankcase is marked “8.12”,
.....
j
is 8.12
6) Therefore, the shim thickness is 0.88 mm.
“B” = 77.53 – 49.02 + 80.52 – 99.98 –
8.12 – 0.02
= 0.91
g
h
i
7) Round off the hundredth digit and select the
appropriate shim(s).
In the example above, the calculated num-
ber is 0.91. The chart instructs you to round
off 1 to 0. Thus, the shim thickness is 0.90
mm (0.035 in).
Hundredths
Round value
0, 1, 2
0
3, 4, 5, 6, 7
5
8, 9
10
j
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