6-22
E
LOWR
SHIMMING
SHIMMING
SHIM SELECTION
(FOR USA AND CANADA)
Pinion gear shim
NOTE:
Find the pinion gear shim thickness (T3) by
selecting shims until the specified measure-
ment (M) is obtained with the special tool.
1. Find the specified measurement (M).
NOTE:
● “P” is the deviation of the lower case
dimension from standard. It is stamped
on the trim tab mounting surface of the
lower case in 0.01 mm units. If the “P”
mark is missing or unreadable, assume a
“P” mark of “0” and check the backlash
when the unit is assembled.
● If the “P” value is negative (–), then sub-
tract the “P” value from the measure-
ment.
Example:
If “P” mark is “–3”, then
M = 0.20 + (–3)/100 mm
= 0.20 – 0.03 mm
= 0.17 mm
If “P” mark is “+2”, then
M = 0.20 + (+2)/100 mm
= 0.20 + 0.02 mm
= 0.22 mm
Specified measurement (M) =
0.20 mm + P/100 mm
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