Removing And Installing The Bearings
Fragment manuala — str. 291–293
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SHAFT DRIVE
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a. Heat the final gear case to approximately 150
Lightly tap on the end of the final drive pinion
°C (302 °F).
gear with a soft hammer.
b. Install the bearing outer races with a socket
or appropriate tool that matches the diameter
EAS23630
of the races.
REMOVING AND INSTALLING THE
c. Install the inner race onto the final drive pin-
BEARINGS
ion gear.
1. Check:
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• Bearings
Damage → Replace. 5. Install:
2. Remove: • Collar “1”
• Collar “1” • Oil seal “2” New
• Oil seal “2” • Bearing “3”
• Bearing “3” (with an appropriate press tool “4” and press)
(with an appropriate press tool “4” and an ap- NOTE:
propriate support for the final gear case) The bearing can be reused, but Yamaha recom-
mends installing a new one.
3. Remove:
• Bearing “1”
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a. Heat the final gear case to approximately 150
°C (302 °F).
b. Remove the bearing outer races with an ap-
propriately shaped punch “2”.
EAS23640
ALIGNING THE FINAL DRIVE PINION GEAR
AND RING GEAR
NOTE:
c. Remove the inner race from the final drive Aligning the final drive pinion gear and ring gear
pinion gear. is necessary when any of the following parts are
NOTE: replaced:
The removal of the bearing is a difficult proce- • Final gear case
dure and is rarely necessary. • Ring gear bearing housing
• Any bearing
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1. Select:
4. Install:
• Final drive pinion gear shim(s)
• Bearing New • Ring gear shim(s)
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SHAFT DRIVE
▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼ Therefore, the calculated final drive pinion
a. Position the final drive pinion gear shim(s) “1” gear shim thickness is 0.51 mm. Shim sizes
and the ring gear with shim(s) “2”. Calculate are supplied in the following thicknesses.
the respective thicknesses from information
marked on the final gear case and the final Final drive pinion gear shims
drive pinion gear. Thickness (mm)
0.30 0.40 0.50
e f
c Since the final drive pinion gear shims are
d only available in 0.10 mm increments, round
B off to the hundredths digit.
Hundredth Rounded value
0, 1, 2 0
A
3, 4, 5, 6, 7 5
8, 9 10
a b In the example above, the calculated final
drive pinion gear shim thickness is 0.51 mm.
The chart instructs you to round off the 1 to 0.
Thus, you should use a 0.50 mm final drive
pinion gear shim.
c. To find ring gear shim thickness “B”, use the
following formula:
Ring gear shim thickness
2 B = (45 + c/100) + (3 + d/100) - [(35.40 -
e/100) + f]
b. To find final drive pinion gear shim thickness
“A”, use the following formula: Where:
Final drive pinion gear shim thickness c = a numeral on the final gear case, to be di-
A = (84 + a/100) - (83 + b/100) vided by 100 and added to “45”.
d = a numeral usually on the outside of the
Where: ring gear bearing housing, to be divided by
a = 84 100 and added to “3”.
b = a numeral on the final gear case, to be di-
vided by 100 and added to “83”.
e = a numeral (positive or negative) on the in-
side of the ring gear, to be divided by 100 and
Example: added to “35.40”.
If the final drive pinion gear is marked “+01”
and the final gear case is marked “50”:
A = 84 - (83 + 50/100)
= 84 - (83 + 0.49)
= 84 - 83.49
= 0.51
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SHAFT DRIVE
2. Install:
• Shims (as calculated)
• Final drive pinion gear
• Bearing retainer
(with the bearing retainer wrench “1”)
Bearing retainer
T.
R.
110 Nm (11.0 m·kg, 72 ft·lb)
ECA14350
CAUTION:
f = the ring gear bearing thickness constant.
The bearing retainer has left-hand threads.
Ring gear bearing thickness To tighten the bearing retainer, turn it coun-
13.00 mm (0.51 in) terclockwise.
Example: Bearing retainer wrench
If the final gear case is marked “51”, the ring 90890-04050
gear bearing housing is marked “35”, the ring Pinion bearing retainer & remov-
gear is marked “- 05”, and “f” is 13.00: er
B = (45 + 51/100) + (3 + 35/100) - YM-04050
[(35.40 + 5/100) + 13]
= (45 + 0.51) + (3 + 0.35) -
[(35.40 + 0.05) + 13]
= 45.51 + 3.35 - [(35.40 + 0.05)
+ 13]
= 48.86 - [35.45 + 13]
= 48.86 - 48.45
= 0.41
Therefore, the calculated ring gear shim 3. Install:
thickness is 0.41 mm. • Coupling gear “1”
Shim sizes are supplied in the following thick- • Coupling gear nut
nesses. (with the coupling gear/middle shaft tool “2”)
Ring gear shims Coupling gear nut
Thickness (mm) T.
R.
110 Nm (11.0 m·kg, 80 ft·lb)
0.25 0.30 0.40 0.50
Since the ring gear shims are only available Coupling gear/middle shaft tool
in 0.10 mm increments, round off the hun- 90890-01229
dredths digit. Gear holder
YM-01229
Hundredth Rounded value
0, 1, 2 0
3, 4, 5, 6, 7 5
8, 9 10
In the example above, the calculated ring
gear shim thickness is 0.41 mm. The chart in-
structs you to round off the 1 to 0. Thus, you
should use a 0.40 mm ring gear shim.
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