IBM Selectric Service Manual

14.5 PRINT MAGNET ADJUSTMENT
An improved method of checking the backstop adjust-
ment is:
Manua
Ily attract the magnet armature and insert a
feeler gage between the armature and backstop (see
Figure
below). When checking it by this method the
clearance should be .046" to .049". If the adjust-
ment is found to be correct all preceding adjustments
must be checked. It wi II be necessary to remove the
magnet assembly for previous cidjustments.
To .044"
Present Adjustment
Figure
14.1
.046 To .049"
L~
t[1fffi~~
Improved Method
Of Adjustment
14.6 All armatures must not contact thei r cores when ener-
gized. Adjust the stops and pivot plate for .004" -
.OOS" clearance between the armatures and yokes.
14.7 CYCLE CLUTCH TRIP
If problems are encountered with cycle clutch trip-
ping when only one armature is used, check the Cycle
Clutch Trip Mechanism to determine if it is the old
style. The old style trip mechonism (trip lever) is
connected directly to the Cycle Clutch Trip Bai I.
The new style trip lever is spring loaded and the
Cycle Clutch Trip Bail Link is connected to a latch
lever
which releases the trip lever.
14.S S.H. EXTRA CYCLES
If the normal routine of print magnet, keyboard, and
cyc Ie clutch adjustments fai I to alleviate an extra
cycle condition, the cycle clutch trip bail (some-
times.known as
the knock-off bail) should be inspected.
If the cycle clutch trip bail does not provide suffic-
ient knock-off motion to the center armatures, extra
cyc les wi II resu It. There have been a few iso lated
instances where the cycle clutch trip bail has been
found to be warped or out of a lignment in the center
portion.
The adjustment of the cycle clutch trip bail is made
by depressing
the extreme right and left hand arma-
tures and observing a clearance of .003" to .OOS"
between the cycle trip bai I knock-off and the knock-
off eccentrics. Check the cycle trip bai I knock-off
by depressing and holding a center armature, hand
cyc Ie the machine thlough an operation and observe
the manually held armature. There should be a slight
rise in this armature at the knock-off point. If there
is no rise, adjust the knock-off eccentrics to the min-
imum .003" clearance. A center armature should
again be depressed and checked for knock-off. If
knock-off is still not present, the cycle trip bail,
PN 1135135, should be replaced with a new one.·
14.9 The latch lever should bite the thickness of the trip
lever lug.
14.10 With an armature manua Ily attracted the latch lever
should clear the trip lever by .020".
14.11 The trip lever should clear the latch by .003" to .010".
14.11 The trip lever should clear the latch by .003;1 to .0lD".
NOTE: This adjustment applies only to Keyboard
Printers. See Reference
Manual for Keyboardless
adjustments.
CYCLE CLUTCH
15.0 Cycle Clutch - Adjustments & Special Notes
15.1 CYCLE SHAFT END PLAY
The cyc I e shaft end play shou Id be .001" - . 003"
(tap the shaft very LlG HTL Y to insure proper seating).
15.2 LATCH HEIGHT
The cyc Ie clutch latch heig ht must a Iways be checked
before attempting cyc Ie clutch collar adjustment
(Fig. 15.1). If the latch is too high, extra cyc les
may occur. If the latch is too low, the cycle clutch
may not un latch.
# 3 Line
Figure
15.0
Cycle clutch latch wear can be caused by the lat-
ching surface not being parallel to the cycle clutch
sleeve. To insure that the latch is parallel to the
sleeve, it should be adjusted in the followi.ng man-
ner:
4-20

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