IBM Selectric Reference Manual

BACKSPACE
No
No
Yes
No
Pawl Binds
Spring Off Pawl
Tab Lever Restricts Pawl 1.7
Wom Escapement Pawl 1.8
Yes
Intermediate Lever Loose or Broken 1.5
Yes
Intermediate Lever 1 .5
Bellcrank Stud 1.4
Escapement Bracket I .7
Binds 1.6
latch 1.3
Worn Pawl SH 1.12
Latch or Cam Follower Broken
Keylever Pawl Off or Adjust. 1.2
Spring Off Interposer or Wrong Spring I .11
Cam Release Lever
is Binding or Rusty. Adjust. 1.1
See Output Mc)de
Too Far
No
Check
Interposer Restoring 1.10
Interposer Latch Spring
Off Or Binding
SeeSH1.9
Yel
Figure 1.0
1.0
1.1
1.2
BACKSPACE
Backspace Adjustments
Wi th the interposer and cam latched, form the Re lease
Lug to obtain .035
11
- .045
11
clearance between the
Interposer Lug and the Release Lever Lug.
The
Keylever Pawl clears the interposer by .020" -
,025".
1.3
1.4
5·1
The latch to bai I clearance should be:
a. .003
11
- .015
11
Space/Backspace.
b. .003
11
- .010
11
Carrier Return/Index.
c. .003
11
- .015
11
Tab or Wordmark.
Adjust the Intermediate Lever adjusting screw to ob-
tain .005" - .015
11
between the B/S Rack and B/5
Pawl with all parts at rest. This adjustment is used to
position the Backspace Rack at rest. It MUST NOT
be used to determ i ne the throw of the backspace rack.

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