Yamaha 40V - Forward Gear Shim

6-21
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. Calculate:
● Specified measurement (M)
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 F mark is “+5”, then M = 0.06 mm + (+5)/100
= 0.06 + 0.05 mm
= 0.11 mm
If F mark is “–5”, then M = 0.06 mm + (–5)/100
= 0.06 – 0.05 mm
= 0.01 mm
2. Install:
● Shimming gauge
● Bearing 1
● Shim(s) 2
NOTE:
● Tighten the nut four turns after contact
with the spring.
● If the original shim(s) is unavailable, start
with a 0.50 mm shim.
Specified measurement (M) =
0.06 mm + F/100
Base plate:
YB-34446-1............................. 3
Compression spring:
YB-34446-3............................. 4
Press plate:
YB-34446-4............................. 5
Gauge pin:
YB-34446-7............................. 6