Yamaha YXR70FX, Руководство по обслуживанию

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DRIV
REAR CONSTANT VELOCITY JOINTS, 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).
Selecting final drive pinion gear shims
1. Select:
• final drive pinion gear shim(s)
1
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a. To find the final drive pinion gear shim thick-
ness “A”, use the following formula.
a
= 92.5 mm (3.6 in).
b
= a numeral (usually a decimal number) on
the final drive pinion gear bearing housing
either added to or subtracted from “34”.
c
= a numeral (usually a decimal number) on
the final drive pinion gear bearing housing
either added to or subtracted from “55”.
d
= a numeral (usually a decimal number) on
the final gear case either added to or sub-
tracted from “112”.
Example:
1)
a
= 92.5
2) If “98” is stamped on the final drive pinion
gear bearing housing,
b
= 34 + 0.98
= 34.98
3) If “48” is stamped on the final drive pinion
gear bearing housing,
c
= 55 + 0.48
= 55.48
4) If “03” is stamped on the final 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 b c
a
d
“A”
1