SHIMMING (FOR USA AND CANADA)
E
SELECTING THE REVERSE GEAR
SHIMS
NOTE:
Find the revers gear shim thickness (T2) by
selecting shims until the specified
measurement (M0) is obtained with the
special tool.
1. Calculate:
• Specified value (M0)
NOTE:
• “R” 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 “R” mark is
missing or unreadable, assume an “R”
mark of “0”, and check the backlash when
the unit is assembled.
• If the “R” value is negative (-), then add the
“R” value to the measurement.
Example:
If R mark is “+5”, then:
M0= 1.00 - (+5)/100 mm
= 1.00 - 0.05 mm
= 0.95 mm
If R mark is “-5”, then:
M0= 1.00 - (-5)/100 mm
= 1.00 + 0.05 mm
= 1.05 mm
2. Measure:
• Specified measurement (M)
Specified value (M0) =
1.00 – R/100 mm
6-35
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