6-25
LOWR
E
SHIMMING
Forward gear shim
NOTE:
Find forward gear shim thickness (T1) by
selecting shims until the specified measure-
ment (M) is obtained with the special tool.
1. Measure:
● Measurement (M)
NOTE:
Measure the length between the shimming
plate and the bearing outer race after turn-
ing the outer race 2 to 3 times.
2. Calculate:
● Forward gear shim thickness (T1)
NOTE:
● F is the deviation of the lower case dimen-
sion from standard. It is stamped on the
trim tab mounting surface of the lower
case in 0.01 mm units. If the F mark is
missing or unreadable, assume an F mark
of “0”, and check the backlash when the
unit is assembled.
● If the F value is negative (–), then subtract
the F value from the measurement.
Example:
If M is “22.30 mm” and F mark is “+5”,
then T1 = 22.75 mm + (+5)/100 – 22.30
= 0.45 + 0.05 mm
= 0.50 mm
If M is “22.30 mm” and F mark is “–5”,
then T1 = 22.75 mm + (–5)/100 – 22.30
= 0.45 – 0.05 mm
= 0.40 mm
Shimming Plate:
90890-06701
Digital caliper:
90890-06704
Forward gear shim thickness
(T1) = 22.75 + F/100 – M
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