C4 Maintenance 8. Joint #4
112 C Series Maintenance Manual Rev.2
Installation: Joint #4 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.
2. Grease the tooth surface of the circular spline to fill the groove.
Grease: SK-1A
Grease amount: About to fill the tooth grooves of the circular spline
3. Grease the tooth surface of the flexspline to fill the groove.
Grease: SK-1A
Grease amount: About to fill the tooth grooves of the flexspline
4. Grease the inner side of the flexspline.
Grease: SK-1A
Grease amount: 10 g
5. Grease the bearing of the wave generator.
Grease: SK-1A
6. Install the O-ring to the Arm #4.
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