IBM Selectric Service Manual

FIGURE 7. Operational Mechanism
IBM #10
1. Escapement-cam-follower roller
2. Print-shaft bearing
3. Escapement clevis
4. Spring-clutch arbor. Oil carriage return spring clutch
only when reassembly is necessary
5. Index pawl
6. Tab-torque-bar pivot
7. Power-tab bell crank-link ends and pivots
8. Feed-roll bearings
9. Escapement-shaft bearing
10. Operational shaft bearing
11 • Operational cam pivot (ratchet) (Use #23 when parts
are removed or repl.aced.)
FIGURE 8. Bottom View Showing Contact Location
1-8
Carrier-Return
Interlock Contact
FIGURE 9A. Right View Showing Contact Location
IBM #23
A. Operational-cam surfaces, rollers, and drive ratchets
B. Actuating arm and check-pawl' contact surface
C. Torque-limiter spring clutch*
*Every 6 months / 1 Shift Operation
Every 3 ,months / 2 Shift Operation
Every 6 weeks /3 Shift Operation
PRINTER CONTACT LOCATIONS
Figures 8 to 12 show the locations of the printer contacts.
FIGURE 9B. Right View Showing Contact Location

IBM Selectric Specifications

General

Type	Electric typewriter
Introduced	1961
Keyboard Layout	QWERTY
Carriage Return	Electric
Manufacturer	IBM
Printing Technology	Typeball (golf ball)
Power Source	AC Power
Power Supply	120V AC