IBM Selectric Maintenance Manual page 12

(Fig. 5. Differential Mechanism)
IBM #10
1. Cycle-clutch latch pivot
2. Center bearing - #9
3. Carrier-return pulleys
4. Cycle-c1ufch check-latch pivot
5. Check-selector latch pivot
6. Tab-torgue-bar pivot
7. Feed roll bearings
8. Escapement-torgue-bar pivot
9. Latch pusher roller and pivot studs
FIGURE 5. Differential Mechanism
1-6
10. Surface of the escapement rack
11. All selector latch and differential mechanism pivots
12. Restore roller pivot
IBM #23
A. Cycle-clutch sleeve surface
B. Cycle-clutch restoring cam and roller
C. Negative-five cam surface
D. Selector-cam surface and roller
E. Pusher bai I cam surface and arm rollers
F. Torgue bars (light film)
X., Cycle clutch (inside)