Yamaha YFM450FAR Service Manual page 257

REAR AXLE/FINAL DRIVE GEAR AND DRIVE SHAFT
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REPLACING THE FINAL DRIVE ROLLER
BEARING
1.Remove:
Roller bearing (ring gear) 1
G
Use a suitable press tool 2 and an
appropriate support for the main housing.
Oil seal 3
G
2.Remove:
Roller bearing (final drive pinion gear) 1
G
*****************************************************
Removal steps:
G
Heat the main housing only to 150 °C
(302 °F).
G
Remove the roller bearing outer race with an
appropriately shaped punch 2.
G
Remove the inner race from the final drive
pinion gear.
NOTE:
The removal of the final drive pinion gear roller
bearing is difficult and seldom necessary.
*****************************************************
3.Install:
Roller bearing (final drive pinion gear)
G
*****************************************************
Installation steps:
G
Heat the main housing only to 150 °C
(302 °F).
G
Install the roller bearing outer race using the
proper adapter.
G
Install the inner race onto the drive pinion
gear.
*****************************************************
4.Install:
Oil seal 1
G
Roller bearing 2
G
Use a suitable press tool 3 and a press to
install the above components into the main
housing.
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