Yamaha FT25B Manual De Servicio página 138

LOWR
SHIMMING (FOR WORLDWIDE)
6500
6600
6520
SELECTING THE FORWARD GEAR
SHIMS
NOTE:
Select the shim thickness (T1) by using the
specified measurement(s) and the calcula-
tion formula.
Select:
• Shim thickness (T1)
Selecting steps
(1) Measure (M1).
Shimming plate ........................ 1
90890-06701
Digital caliper ............................ 2
90890-06704
NOTE:
• Turn the tapered roller bearing outer race
two or three times so the rollers seat.
Then, measure the height of the bearing,
as shown.
• Perform the same measurement at three
points on the tapered roller bearing outer
race.
• Find the average of the measurements
(M1).
(2) Calculate the forward gear shim thick-
ness (T1).
Forward gear shim thickness
(T1) = 22.75 + F/100 – M1
NOTE:
"F" 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 "F" mark is
missing or unreadable, assume an "F"
value of "0", and check the backlash when
the unit is assembled.
– 57 –
E