TOHATSU BFT 250A, Service Manual

Page: 543 / 639

17-39
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GEAR CASE (COUNTER ROTATION)
Remove the gear case cover from the gear case (page
17-7).
Cross reference the engagement mark [1] located on
the gear case cover installation part of the gear case [2]
and the tolerance, and refer to the reverse bevel gear
shim selection table to determine the required thickness
of the shim (Sr).
Reverse bevel gear shim selection table
Refer to 17-37 for information on how to read the shim
selection table and shim combination.
Select the shims from the reverse bevel gear shims of
different thickness to obtain the required thickness (Sr)
by combining the shims.
Shim type table
Install the gear case cover on the gear case (page 17-
7).
After shim selection, inspect the reverse bevel gear
backlash (page 17-41).
[1]
[2]
Unit: mm
Calculation value
–0.29
–
–0.25
–0.25
–
–0.20
–0.20
–
–0.15
–0.15
–
–0.10
–0.10
–
–0.05
–0.05
–
0
Gear case
engagement
mark
1 0.70 0.65 0.60 0.55 0.50 0.45
2 0.65 0.60 0.55 0.50 0.45 0.40
3 0.60 0.55 0.50 0.45 0.40 0.35
4 0.55 0.50 0.45 0.40 0.35 0.30
5 0.50 0.45 0.40 0.35 0.30 0.25
6 0.45 0.40 0.35 0.30 0.25 0.20
Shim type Thickness
Shim A 0.10 mm
Shim B 0.15 mm
Shim C 0.30 mm
Shim D 0.50 mm