6-20
E
LOWR
SHIM SELECTION (FOR USA AND CANADA)
3. Using a thickness gauge at the specified
measurement (M) established above,
check the fit between the shimming
gauge and upper disc of the tool.
4. If the thickness gauge at the M specifi-
cation will not fit, then remove or add
the shim(s) until the thickness gauge
just fits between the tool surfaces.
Thickness gauge:
YU-26900-8
YU-26900-9
Available shim thicknesses:
0.10, 0.12, 0.15, 0.18, 0.30, 0.40
and 0.50 mm
Reverse gear shim
NOTE:
Find the reverse gear shim thickness (T2) by
selecting shims until the specified measure-
ment (M) with the special tool is obtained.
1. Find the specified measurement (M).
NOTE:
1. 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.
2. If the R value is negative(–), then add the
R value to the measurement.
Specified Measurement (M) =
60, 70 hp:
1.00 mm – R/100 mm
75, 90 hp:
1.50 mm – R/100 mm
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