Service Manuals, User Guides, Schematic Diagrams or docs for : IBM typewriter ET_News_Letter_1960
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January, 1960
CONTENTS
INFORMATION:
ROUGH EDGES - MODEL C PLASTIC CARD HOLDERS AND
CARBON RIBBON CORNER GUIDES
NEW PLASTIC FOR IBM PLATE WRITING RIBBON SPOOLS
STRONGER FABRIC RIBBON ANCHOR CLIP SPRING
LOOSE NYLON FABRIC RIBBON FEED AND REVERSE GEARS
BREAKAGE OF RIBBON LIFT BAIL MOUNTING STUD
SHIFT LOCK FAILURE TO RESTORE
SHIFT TOGGLE PLATE ASSEMBLIES - FIELD REPLACEMENT
INTERMITTENT TYPE PILING
SPACEBAR CLIP INTERFERENCE WITH KEYBUTTONS
CRIPPLING 3-UNIT SPACEBAR TYPAMATIC ACTION
TOOL NUMBER AVAILABLE FOR VALVESPOUT OILER RES-
ERVOIR
POSITIONING OF VALVESPOUT OILER SPOUT
FAILURE OF R. H. CARRIAGE END COVER TO CLOSE
IMPROVED FUNCTIONAL CAM OPERATION
INTERFERENCE WITH L1NELOCI< SPRINGS
REDESIGNED COVER LATCHES
CARRIAGERETURNTAPEWEAR - ANTI-WHIPGUARDSLEEVE
FABRIC RIBBON BUNCHING
ROUGH EDGES - MODEL C PLASTIC CARD HOLDERS AND CAR-
BON RIBBON CORNER GUIDES
Check plastic card holders and wire carbon ribbon corner guides on
the Model C ET for possible sharp edges. Dressing these parts smooth
is recommended. The flat file can be used for this purpose.
Th is condition has been corrected on current machine production.
NEW PLASTIC FOR IBM PLATE WRITING RIBBON SPOOLS
Polypropylene plastic is now being used in the fabric ribbon spools
of IBM plate writing ribbons. These spools are not affected by the
chemical properties of the ink in plate writing ribbons and can be
identified by the increase in flexibility over the former spools. '
STRONGER FABRIC RIBBON ANCHOR CLIP SPRING
A stronger fabric ribbon anchor cl ip spring is now being used to
double the anchor clip's holding force. The new spring carries the
same part number (1118357) as the former spring.
LOOSE NYLON FABRIC RIBBON FEED AND REVERSE GEARS
; -lylon ribbon feed and reverse gears Part No. 1118312 are now
being drilled and tapped all the way through. This will provide an
additional hole which may be used to secure the gear if the original
hole becomes stripped.
This is a temporary change to reduce the necessity of replacing the
gear. A permanent modification is being made.
BREAKAGE OF RIBBOr-l LIFT BAIL MOUNTING STUD
The ribbon lift bai I mounting stud lock nut Part No. 7341 has been
changed to elastic stop nut Part No. 103372 to eliminate breakage
of the stud due to excessive torque. The torque on the stud has also
been reduced on the line.
SHIFT LOCK FAILURE TO RESTORE
Occasional shift lock failure to restore on Executive machines may
be traced to excess end play in the 5-unit selector bail Interfering
with movement of the shift lock. The end play in the bai' may be
reduced by removing the C-c1 ip on its R. H. end and substituting
feed roll clip Part No. 1110093.
2
SHIFT TOGGLE PLATE ASSEMBLIES - FIELD REPLACEMENT
The entire shift toggle shaft assemblyshould be replaced if it is nec-
essaryto replace the right hand or left hand shift toggle plate assem-
bly. The individual plate assemblies are drilled as a set for accuracy
and are consequently not interchangeable.
INTERMITTENT TYPE PILING
Intermittent type piling can be caused by the tab decelerator bell-
crank Part No. 1117428 catching on the tab rack spring guard screw-
heads. This may be corrected by careful forming of the bellcrank
toward the front of the machine.
SPACEBAR CLIP INTERFERENCE WITH KEYBUTTONS
If the spacebar shaft retainer clip is turned on the spacebar shaft
assembly so that the open portion of the clip is up, the clip can
sometimes interfere with the keybuttons, locking both the keylever
and spacebar. The open portion of the clip should be down.
CRIPPLING 3-UNIT SPACEBAR TYPAMATIC ACTION
Occasionally someone requests that the repeat action of the 3-un it
. spacebar be crippled. An easy way to do this is to use one of the
basket shipping grommets. Cut off the "handle" end of the grommet
and slip the slotted portion over the front frame in the notch below
the keylever. The grommet will not come off and it provides a good
stop.
TOOL NUMBER AVAILABLE FOR VALVESPOUT OILER RESERVOIR
The oil reservoir of the Valvespout Oiler Part No. 9900034 has been
assigned Part No. 9900108. It is now available under this number
for Field replacement needs. The replacement of the spout will ne-
cessitate ordering the entire oiler.
POSITIONING OF VALVESPOUT OILER SPOUT
The Valvespout Oiler Part No. 9900034 spout tends to go past the
center position after the oiler has been filled several times, pre-
venting the spout from lying flat in the service case. This can be
remedied by placing washers between the reservoir and the spout.
Washer Part No. 1106172, washer Part No. 1078497, or a com-
bination of these may be used. The thickness of the washer or wash-
ers will determ ine the amount of correction.
3
FAILURE OF R. H. CARRIAGE END COVER TO CLOSE
Failure of the R. H. cdrriage e~d cover to completely close may be
caused by the upright ear of the R. H. platen latch hitting the hinge
of the R. H. carriage release lever button. The ear of the platen
latch may be formed outward to eliminate this condition.
IMPROVED FUNCTIONAL CAM OPERATION
Action has been taken to improve functional cam operation through
improved adjustment of the components, ultra high frequency sonic
cleaning and centerless ground shafts. Cams installed in Standard
machines above serial number 1212755 and Executive serial number
2029026 have received this handling.
INTERFERENCE WITH LlNELOCK SPRINGS
The actuating arm of the carriage return key lock may interfere with
the linelock bar springs. If this condition exists, it may be necessary
to form the portion of the carriage return keylock that contacts the
switch lever indicator.
REDESIGNED COVER LATCHES
Cover latches have been redesigned to latch the cover down more
securely. The new latches have the same part number as former
latches.
CARRIAGE RETURN TAPE WEAR - ANTI-WHIP GUARD SLEEVE
A polyethylene sleeve Part No. 1263965 is available for field in-
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