C4 Maintenance 9. Joint #5
C Series Maintenance Manual Rev.2 127
Installation: Joint #5 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 on the right.
Wave generator
Flexspline
Circular spline
2. Grease all over the tooth surface of the flexspline.
Grease: SK-2
Grease amount:
About to fill the tooth groove of the
flexspline.
3. Grease all over the tooth surface of the circular spline.
Grease: SK-2
Grease amount: About to fill the tooth groove of the circular
spline.