TOHATSU BFT115A Service Manual page 537

HOW TO READ SHIM SELECTION TABLE
When the engagement mark on the gear case housing
is C and tolerance is -0.05 mm (-0.002 in), the shim
selection table shows that the required shim thickness
is 0.55 mm (0.022 in). (See the table shown below).
Pinion gear shim selection table
-0.31
–
-0.25
A 0.70
B 0.75
C 0.80
D 0.85
E 0.90
F 0.95
HOW TO SELECT SHIM COMBINATION
To obtain 0.55 mm (0.022 in) of shim thickness,
combine one gear shim A, one gear shim B, and one
gear shim C, or combine four gear shim A and one gear
shim B.
FORWARD BEVEL GEAR SHIM
Assemble the outer race (1) and inner race (2) of a new
taper bearing, and turn the outer race two or three turns
to seat the bearing.
If using a depth gauge (3), measure the bearing height
(F) from the outer race end to the inner race end as
shown, and record the measurement.
If using a vernier caliper (4), place the assembled taper
bearing on the smooth side of the gauge adapter
special tool (or flat, hard surface).
Press the outer race down over the inner race and
measure the bearing height (F) (5).
TOOL:
Gauge adapter, 100 mm (6)
Calculate the tolerance using the measurement F
obtained in the previous step and the following formula.
Formula: Tolerance = F - 28.00
Example:
When measurement (F) from the outer race end to the
inner race end is 28.05 mm (1.104 in):
Tolerance = 28.05 - 28.00 = 0.05
The tolerance is 0.05 mm (0.002 in).
GEAR CASE (STANDARD ROTATION)
-0.25 -0.20
– –
-0.20 -0.15
0.65 0.60
0.70 0.65
0.75 0.70
0.80 0.75
0.85 0.80
0.90 0.85
070PJ-ZY30100
Calculation value
-0.15 -0.10
– –
-0.10 -0.05
0.55 0.50
0.60 0.55
0.65 0.60
0.70 0.65
0.75 0.70
0.80 0.75
(1)
(2)
(4)
(1)
(6)
Unit: mm
-0.05 0
– –
0 +0.05
0.45 0.40
0.50 0.45
0.55 0.50
0.60 0.55
0.65 0.60
0.70 0.65
(3)
(5)
(2)
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