Service manual

69J1D11
6-52
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Selecting the reverse gear shims
1. Calculate the specified value (M0) as
shown in the examples below.
NOTE:
“F” is the deviation of the lower case dimen-
sion from standard. The “F” mark
a
is
stamped on the trim tab mounting surface of
the lower case in 0.01 mm units. If the “F”
mark is unreadable, assume that “F” is zero
and check the backlash when the unit is
assembled.
Example:
If “F” is (+5), then
M0 = 30.60 + (+5)/100 mm = 30.60 + 0.05 mm
= 30.65 mm
If “F” is (–3), then
M0 = 30.60 + (–3)/100 mm = 30.60 – 0.03 mm
= 30.57 mm
2. Set the thrust bearing
1
to the bearing
retainer
2
as shown.
3. Turn the thrust bearing two or three times
to seat the bearing retainer, and then
measure the bearing height (M).
NOTE:
Measure the bearing retainer at three points
to find the clearance average.
4. Select the reverse gear shim(s) (T1).
NOTE:
The sum of T1 and M should not be more
than M0.
Selecting the forward gear shims
1. Calculate the specified value (M0) as
shown in the examples below.
Calculation formula:
Specified value (M0) = 30.60 + F/100 mm
Calculation formula:
Reverse gear shim thickness (T1) =
M0 – M
Available shim thicknesses:
0.10, 0.12, 0.15, 0.18, 0.30, 0.40, and
0.50 mm
Shimming (counter rotation model)