Coupling Bearing Inspection
Since the coupling bearing is made to extremely close
tolerances, the clearance can not normally be measured.
It is not necessary to remove the coupling bearing for
inspection. If the bearing is removed, it will need to be
replaced with a new one.
Turn the bearing in the coupling back and forth [A] while
checking for plays, roughness or binding.
If the bearing play, roughness or binding is found, replace
Examine the bearing seal [B] for tears or leakage.
If the seal is torn or is leaking, replace the bearing.
Coupling Bearing Lubrication
Since the coupling bearing is packed with grease and
sealed, lubrication is not required.
Coupling Damper Inspection
Remove the rear wheel coupling, and inspect the rubber
Replace the damper if it appears damaged or deterio-
Sprocket Wear Inspection
Visually inspect the engine and rear sprocket teeth for
wear and damage.
If the teeth are worn as illustrated, replace the sprocket,
and inspect the drive chain wear (see Drive Chain Wear
Inspection in the Periodic Maintenance chapter).
Worn Tooth (Engine Sprocket) [A]
Worn Tooth (Rear Sprocket) [B]
Direction of Rotation [C]
If a sprocket requires replacement, the chain is proba-
bly worn also. When replacing a sprocket, inspect the
FINAL DRIVE 11-13