Selecting The Forward Gear Shims - Yamaha F200C Service Manual

Selecting the forward gear shims

1. Calculate the specified value (M0) as
shown in the examples below.
NOTE:
"F" is the deviation of the lower case dimen-
sion from standard. The "F" mark a is
stamped on the trim tab mounting surface of
the lower case in 0.01 mm units. If the "F"
mark is unreadable, assume that "F" is zero
and check the backlash when the unit is
assembled.
Calculation formula:
Specified value (M0) = 0.50 – F/100 mm
Example:
If "F" is (+5), then
M0 = 0.50 – (+5)/100 mm = 0.50 – 0.05 mm
= 0.45 mm
If "F" is (–3), then
M0 = 0.50 – (–3)/100 mm = 0.50 + 0.03 mm
= 0.53 mm
2. Set the shimming tool on the taper roller
bearing.
Shimming gauge I 1: YB-06439
3. Measure the clearance (M) between the
shimming tool and the bearing outer race
2 as shown.
69J1D11
Shimming (regular rotation model)
NOTE:
Measure the taper roller bearing at three
points to find the clearance average.
4. Select the forward gear shim(s) (T1).
NOTE:
The sum of T1 and M0 should not be more
than M.
Calculation formula:
Forward gear shim thickness (T1) =
M – M0
Available shim thicknesses:
0.10, 0.12, 0.15, 0.18, 0.30, 0.40, and
0.50 mm
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