IBM Selectric Service Manual

SPACING
No
No
Key lever linkage
Key lever Pawl Adjust. 2.2
D Interlock 2.4
Spocebor Interlock 2. 12
See Ou tpu t Mode
Filter Sheft Interlock 2.12
Binding Releose lever
Spring Off Interposer 2.13
Wrong Spring 2.17
Releose lug Adjust. 2.1
Bind In Release lever
Or Com-Rust
Ves
Check:
Carrier Bind
Dust Covers
Ves
Not Enough
Feed
Roll Mounting Arms
Card Holders, Reor Anvil and Shees
Rear
Carrier Shoe
Escapement Cord
Off Pulley
Pinion Gears Bind
Main Spring Tension 2.11, 2.18
Escape Shaft 2.19
Check:
Interposer Restoring 2.16
Interposer latch Spring'
Off Or Binding
See
SH 2.15
Worn Powl Fig 3.1
Ves
Escapement
link 2.7
Escapement Cam Is Restricting Trigger 2.9
Trigger Not latching
latch To Bail Clearance 2.3
Figure 2.0
2.0
2.1
2.2
2.3
2.4
2.5
2.6
2.7
SPACING
Spacebar Adjustments
Wi th the interposer and cam latched, form the Re lease
Lug to obtain .035" - .045" clearance between the
I nterposer Lug and the Re lease Lever Lug.
The Keylever
Pawl should clear the interposer by
.020" - .030".
The backstop should be adjusted so that the keylever
paw I operates free I y (.035" bi te) .
The latch to bai
I clearance shou Id be:
a. .003" - .015" Space/Backspace.
b. .003" - .010" Carrier Return/Index.
c. .003" - .015" Tab or Wordmark.
The lockout shaft may flip
over if the lockout shaft
link is allowed to move to the left or right. A clip,
PN 1138464, may be insta lied on the lockout bai I to
limit any movement.
The pawl mounting stud should clear the Escapement
Torque
Bar by .001" at the closest point.
The Torque Bar shou Id c lear the Re lease Lug by .002"
- .010". Later models use hig~ side of spec.
The Escapement Link should span the gap between the
Escapement Cam Follower Arm and the Spacebar Trig-
ger Lever.
4-3
Pawl Mounting Stud Loose or Mal-Adjusted 2.5
Torque Sor To Pawl lug Clearance 2.6
Trigger Adjustment 2. B
2.8 The trigger should disengage from the Torque Bar
when
the pawls are .010" - .015" from the rack.
2.9 Escapement should occur after printing and after the
typehead has moved away from the platen by 1/4" to
1/2".
2.10 Escapement Shaft binds may be relieved by tapping
the bearings on the Escapement Shaft to improve the
bearing ,a lignment.
2.11 The Mainspring tension should be 1/2 to 3/4 Lbs. at
R.H. margin. See 2.18.
2.12 Positi on the escapement cam left or right to leave
.020" - .030" lateral motion in the Lockout Cam
when
it is on the high point of the Escapement Cam.
Adjust the Lockout Cam to allow .020" - .030" front
to
rear motion in the Interposer when the Lockout Cam
is
engaged. Adjust the Interposer Guide Bracket for
.015" - .025" clearance between the Interposer and
Lockout when the Lockout is at rest. (Note: For
the late level Interlock - see Reference Manual.)
2.13 The Spacebar Interposer spring should be in the middle
hole
of the Interposer. See 2.17.
2.14 S. H. INTERMITTENT FAI LURE TO SPACE
Intermittent space fai lures can be caused by excessive
cycle clutch overthrow or incorrect print escapement
cam tiniing.

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