TOHATSU BFT75A Service Manual page 467

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GEAR CASE
Lift the outer race [1], remove the inner race, and
replace the outer race on the gauge adapter special tool
[2].
Measure the height of the outer race (Distance D'') [3]
and record it.
Calculate the length from the inner race end to the outer
race end (D) by determining the gap between the
measurements D' and D'' using the following formula.
Formula: D= D' - D''
Example:
When measurement (D') from the outer race end to the
inner race end is 34.90 mm (1.374 in), and outer race
height (D'') is 29.58 mm (1.165 in):
E= 34.90 - 29.58 = 5.32
The gap (D) from the inner race end to the outer race
end is 5.32 mm (0.209 in).
Determine the tolerance and record it using the
measurement (C), calculation (D) and the following
formula.
Formula: Tolerance = C + D - 147.45
Example:
When measurement (C) from the pinion gear end to the
end of the vertical shaft collar is 141.95 mm (5.589 in),
and calculation (D) from the inner race end to the outer
race end is 5.32 mm (0.209 in):
141.95 + 5.32 - 147.45 = -0.18
The tolerance is -0.18 mm (-0.007 in).
Remove the trim tab (page 16-4).
Cross reference the engagement mark [1] located on
the trim tab installation part of the gear case [2] and the
tolerance calculated in the previous step, and refer to
the pinion gear shim selection table to determine the
required thickness of the shim (Sp).
16-38
Distance D'':
[1]
[2]
[1]
[3]
[2]