TOHATSU BFT115A Service Manual page 535

GEAR CASE (STANDARD ROTATION)
Measure the height (E'') of the taper roller bearing outer
MEASUREMENT E '' :
(1)
race (1) using a depth gauge (2) or vernier caliper (3),
and record it.
(2)
Calculate the length from the inner race end to the outer
race end (E) by determining the gap between the
measurements E' and E'' using the following formula.
Formula: E= E' - E''
Example:
When measurement (E') from the outer race end to the
inner race end is 34.90 mm (1.374 in), and outer race
height (E'') is 29.65 mm (1.167 in):
E= 34.90 - 29.65 = 5.25
The gap (E) from the inner race end to the outer race
(1)
end is 5.25 mm (0.207 in).
Determine the tolerance and record it using the
(3)
measurement (D), calculation (E) and the following
formula.
Formula: Tolerance = D + E - 147.2
Example:
When measurement (D) from the pinion gear end to the
end of the vertical shaft flange is 141.90 mm (5.587 in),
and calculation (E) from the inner race end to the outer
race end is 5.25 mm (0.207 in):
141.90 + 5.25 - 147.2 = -0.05
The tolerance is -0.05 mm (-0.002 in).
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