C4 Maintenance 6. Joint #2
C Series Maintenance Manual Rev.2 83
Installation: Joint #2 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.
Tooth grooves of the circular spline and the flexspline, and
the bearing of the wave generator are pre-greased.
Wipe grease if it is attached to the fitting parts.
O-ring
Flexspline
+Cross roller bearing unit
Circular spline
Wave generator
CAUTION
■
Do not adjust the bolts securing the flexspline and the cross roller bearing.
If the
bolts are adjusted, it requires centering of the parts by the reduction gear unit
manufacturer.
2. Set the O-
rings to the grooves on both faces of the circular
spline.
Make sure to fit the rings completely.
Convex surface
Concave surface
Convex surface
Groove
Concave surface
Groove
3. Set the flexspline with the convex surface facing down.
After setting it, make sure to confirm that the surfaces of the
circular spline and flexspline are matched.
4. Match the screw holes on the cross roller bearing's inner ring
and the drilled holes on the circular spline.
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