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6 Shift the drive shaft as shown by an arrow and remove the shaft from the bearing. 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
7 Rotate the gear counterclockwise and remove the gear.   
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
8 Install the new gear in reverse order of the procedures above. 
When installing, coat the gear teeth with the silicone grease. 
    (Use Silicone Grease G501 made by Shin-etsu Chemical Co., Ltd.)