TOHATSU BFT75A Service Manual page 469

dummyhead dummyhead
GEAR CASE
FORWARD BEVEL GEAR SHIM
If you have a gauge adapter special tool, place the disc
that is included with that tool on a flat surface.
Make sure the side marked with the tool number is on
the bottom and the smooth side is up.
If you do not have a gauge adapter special tool, use any
flat, hard surface for this procedure.
TOOL:
Gauge adapter, 100 mm [1]
Assemble the outer race [2] and the inner race [3] of a
new taper bearing (50 x 82 x 21.5 mm).
Place the bearing assembly on the smooth side of the
gauge adapter special tool (or flat, hard surface).
Press the outer race down over the inner race, and turn
the outer race two or three turns.
Measure the bearing height (E) [4] from the outer race
end to the inner race end using a regular vernier caliper
[5] as shown, and record the measurement.
Calculate the tolerance using the measurement E
obtained in the previous step and the following formula.
Formula: Tolerance = E - 21.5
Example:
When measurement (E) from the outer race end to the
inner race end is 21.54 mm (0.848 in):
Tolerance = 21.54 - 21.5 = 0.04
The tolerance is 0.04 mm (0.002 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 forward bevel gear shim selection table to
determine the required thickness of the shim (Sf).
Forward bevel gear shim selection table
1
2
3
4
5
6
Refer to page 16-39 for information on how to read the
shim selection table and shim combination.
16-40
070PJ-ZY30100
0 +0.05
– –
+0.05 +0.10
0.60 0.55
0.55 0.50
0.50 0.45
0.45 0.40
0.40 0.35
0.35 0.30
[5]
[2]
[1]
[1]
Calculation value
+0.10
–
+0.15
0.50
0.45
0.40
0.35
0.30
0.25
[4]
[3]
[2]
Unit: mm
+0.15
–
+0.20
0.45
0.40
0.35
0.30
0.25
0.20