Yamaha YFM660FS, Supplementary Service Manual

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7 - 24
DRIV
REAR CONSTANT VELOCITY JOINT/FINAL DRIVE GEAR
AND DRIVE SHAFT
POSITIONING THE FINAL DRIVE PINION
GEAR AND RING GEAR
When the final drive pinion gear, ring gear,
final gear case and/or ring gear bearing hous-
ing are replaced, be sure to adjust the posi-
tions of the final drive pinion gear and ring gear
using the shim(s).
Final drive pinion gear shim selection
1.Select:
●
Final drive pinion gear shim(s)
1
*****************************************************
Selection steps:
●
To find the final drive pinion gear shim thick-
ness “A”, use the following formula.
a
= 92.5 mm
b
= a numeral (usually a decimal number)
on the pinion gear bearing housing
either added to “34”
c
= a numeral (usually a decimal number)
on the pinion gear bearing housing
either added to “55”
d
= a numeral (usually a decimal number)
on the final drive gear case either added
to “112”
Example:
1)
a
= 92.5
2) If “98” is stamped on the pinion gear
bearing housing,
b
= 34 + 0.98 = 34.98
3) If “48” is stamped on the pinion gear
bearing housing,
c
= 55 + 0.48 = 55.48
4) If “03” is stamped on the final drive gear
case,
d
= 112 + 0.03 = 112.03
5) Therefore, “A” is 0.97.
“A” = 92.5 + (55.48 – 34.98) – 112.03
= 0.97
Final drive pinion gear shim thickness:
“A” =
a
+ (
c
–
b
) –
d