IBM Selectric Reference Manual

spare be It has been p laced on the s,haft, it does not
interfere with the positive bai I or the selector latch
link~ and is not too tight around the cycle shaft as to
cause rotation of the spare belt.
CONTACT ASSEMBLIES
21.0 Contact Assemblies
See the applicable Systems Manual for all specifica-
tions.
21.1 S.H. CLEANING
a. The contacts must not bridge or bounce.
b. The contacts must be clean, especia Ily the N/C
contacts as they tend to bui Id up a residue.
c. The contacts should be cleaned with IBM clean-:-
ing fluid and wiped dry with clean bond paper.
Caution - Do not use fi les, abrasives, or burn-
ishing tools to clean the contacts.
21.2 S.H. OILY CONTACTS
If the contacts become oi Iy due to oi I bleeding from
the blue stee I straps, the contact assemb Ii es may be
rep laced. I/O Pri nter contact assemb Ii es now use
nickel plated straps to prevent this problem and they
may be obtained under the original part numbers.
21.3 S.H. TAB INTERLOCK MICRO-SWITCH
If the actuating wire pops cot from under the torque
bar actuati ng arm, form the rear secti on of the actua-
ting wire to provi de an overthrow stop for the wire
(Figure 22. 1). See the I/O Printer Reference Man-
ua I for the speci fi c adj ustments .
Form Down Here
Tab
t -J--.."....n.........-~-----rJ'
Tab Micro Switch
Figure
21.0
21.4 S.H. C5 AND C6 CONTACT SHIELD
In order to prevent contamination such as dirt, oi I,
and grease from entering C5 and C6 contacts, a
shield has been provided. The new shield, PN
1159536, will be included in all future production
I/O Pri nters .
This
shield may be field installed if a new mainspring
assembly is used
since the old mainspring assembly
would
interfere with its installation. The new main-
spring assemb Iy may be ordered under PN 1164342.
The contact shields may be installed under the present
contact mounting screws.
These shields should be used whenever a service call
or machine rna Ifunction arises due to contact contam-
ination.
Part No.
1159536
1164342
Description
Shield, Contact
Mainspring Assembly
21.5 Contact Timings may be set with a meter. (See ap-
plicable Systems Reference Manual.)
To detect contact bounce or a marginal bridging con-
dition a scope must be used.
SELECTRIC I/O PRINTER TOO LS AND
REFERENCE MATERIAL
22.0 SELECTRIC I/O PRINTER TOO LS AND REFERENCE
MATERIAL
5-27
It is necessary to have the proper tools, reference ma-
terial, and parts catalogs to properly service the Se-
lectic I/O Printer.
The following is the list of the required tools. These
tools shou
Id be used even though simi lar tools are
avai lable as standard issues, since OP has supplied
us with "special" thin wrenches for work in difficult
aza;'<J C) () ~. .t';:.~{·1v·" . }:l~ ("'11
Part No. Qty. Description '
158645
450813
450818
452798
460870
1145391
1280441
1280442
1280443
1280444
9900005
9900028
*9900034
*9900059
*9900060
9900061
9900090
9900103
9900105
9900210
9900216
9900111
9900112
9900173
9900190
9900200
9900208
9900255
1
1
1
1
1
1
1
1
2
1
1
1
1
1
2
Grease Gun
Grease Gun Nozzle - cycle
clutch
Screwdriver 8"
Keybutton Removal Tool
Scale (Rotate Tension)
Hand
Cycle Wheel
1/2 oz. tube - IBM #23- -
1 lb. can - IBM #23
4
oz. can - IBM #10
1 pint can - IBM #10
Wrench
1/4" x 5/16" (Special)
6 Flute Wrench ~4 (Rotate Pulley)
Oi ler 'for IBM #10
Spring Hook
Screw Starter
5/16" Spintite
3/4" x 5/8" Wrench (pin feed
plate)
6 Flute #10 Wrench (Cycle Clutch)
Small Spring Hook
Spring Hook (Spring Holding)
6 Flute Wrench #2
(Gearless Ti It)
1/8" x 5/32" Wrench
Hooverometer
4 Flute Wrench #2
(C1-C2)
T -Bender (Form pushers)
6 Flute #6
Wrench
3/16" x 7/32" Wrench
6 F
lute Wrench # 133
*If these tools are already included in the standard
tool issue, they need not be ordered.

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