C4  Maintenance  5. Joint #1 
 
C Series Maintenance Manual Rev.2  67 
Installation: Joint #1 Reduction gear unit 
When tightening hexagon socket head cap bolts, refer to the 2.4 Tightening Hexagon Socket 
Head Cap Bolts. 
 
1.  Unpack the new reduction gear unit package and check if it contains the parts below. 
Specification type (1)  Specification type (2) 
 
 
2.  Place the friction plate (EKagrip) on the end face of the shaft to 
match the screw holes. 
 
This step is not necessary for the specification type (2) since the 
friction plate (EKagrip) is not included in the part. 
 
3.  Apply grease all over the tooth flank of the flexspline. 
 
Grease: SK-1 
Grease amount: enough to fill in the grooves