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TO: ALL CUSTOMER ENGI NEERS
The attached News Letter is intended to replace all News Letters
issued since the announcement of the Model C in January, 1959. All
information considered pertinent at this time has been grouped by
mechanism for your convenience. This should be particularly helpful
to new Customer Engineers who have not received back issues of News
Letters.
---ElB5M---
Every effort has been made to reduce the number of items in this pub-
lication. Most Parts Manual corrections have been deleted since it is
assumed that the changes were made upon receipt of the original News
Letters involved. Technical items have been omitted if they no longer
apply or have been included in other publications. Those items con-
sidered helpful to a majority of the Customer Engineers have been
retained.
The 1961 issue of the ET Parts Manual will make possible a still fur-
ther reduction in the quantity of News Letters required.
c,t'~~
C. L. Gregoire
IVtanager, Customer Engi neeri ng,
Lexington Plant
TABLE OF CONTENTS
Code Mechanism
201 Backspace - - - - - 2
202 Carriage & Rails 2
203 Carriage Return 6
205 Decelerator - Governor 9
206 Escapement - - - - - 11
209 Keyboard Lock & Bell 13
210 Margin - - - - 14
211 Motor & Dri ve - 15
212 Platens - - - - 17
213 Fabric Ribbon 18
214 Carbon Ribbon - - - - - 25
215 Dual Ribbon - - - - - - - 26
216 Shift -- 26
217 Spacebar 28
218 Tab - - - - - - - - - - - 29
219 Typebar Operating - 30
230 Decimal Tab 34
Hektowriter - - - - - - - - 35
Attachments - - - - - - - - 36
Tools - - - - - - - - - - - - - - - - 38
Service Hints & Misc Information - - - - 41
Additions & Corrections to Parts - - - - 49
Manual, CEM's, etc.
Time Equipment - - - - - - - - - 50
BACKSPACE 201
C - STANDARD BACKSPACE BELLCRANK IDENTIFICATION
Standard Model C backspace bell cranks are now being marked for
easy identification as indicated below:
62/5, 8 & 9P Marked wi th a 0
10, 12P Marked wi th a 0
14P Marked with a 6.
The symbol is located on the vertical portion {left side}of the bell-
crank.
BACKSPACING ON ROBOT OPERATED ET
For increased efficiency and speed when underscoring on a robot-
operated typewri ter, the underscore can be made into a dead or
non-escaping typebar. This is done by removing a portion of the
typebar where it contacts the U-bar.
BACKSPACE ADJUSTMENT
When adjusting backspace it may be necessary to have more than
1/4" of travel Ieft on the backspace cam when the backspace pawl
contacts its stop. The operating I ink should be shortened unti I the
ET will reliably backspace all the way to the left margin.
CARRIAGE & RAILS 202
IDENTIFICATION CODES FOR lINESPACE LEVER - MODEL C
A chart has been prepared for easy identification of linespace
levers for the Model C. Compare the number stamped on the lever
cam with this chart for positive identification
Stamped Code Part No. Description
1 1115681 29T(123}, 60T(246}
2 1115682 32T(123}, 33T(123}, 34T(123}
3 1115683 35T(123}, 36T(123}, 44T(123}
4 1115684 38T(123}, 39T(123}, 40T(123}
5 1115685 4lT(234}
6 1115686 44T(234}
7 1115687 45T(124}, 46T(124}
8 1115688 48T(235), 49T(235}
9 1115689 50T(234), 51 T(234}, 52T(234)
10 1115690 53T(234}, 55T(234}
11 1115691 54T(246), 62T(246}
12 1115692 57T(234}, 58T(234}, 59T(234)
13 1115693 58T(246), 66T(246)
14 1115694 60T(234), 61T(234}, 62T(234)
15 1115695 66T(234)
2
EXCESSIVE SIDE PLAY - INDEX PAWL CARRIER
Side play can permit the pawl carrier to latch under the upper stop
arm and fail to restore. This shows up as linespace trouble. The
solution is to add a spring washer, PIN 1072477, between the
carriage side frame and the index pawl carrier.
INDEX PAWL CARRIER C CLIPS STANDARDIZED
All three C clips used on index pawl carrier studs are now PIN
1073418. This clip replaces two PIN 123206 clips and one PIN
147297 clip. The dimensions of the studs on the pawl carrier have
been changed to permit this standardization. Because of this, "old
style" Cclips should not be used on "new style" studs as the former
clips will be too loose and could easily fall off. The PIN 1073418
clip is the one which is used to hold the index carrier stop arm.
INDEX PAWL LOWER STOP SCREW CHANGED
The index pawl lower stop screw, PIN 63324, has been changed to
a shorter screw, PIN 1090845. This was done to prevent the end
of the screw from extendi ng through the carri age si de frame too far.
IMPROVED C BAIL - ABOVE STD #1163613 & EXEC #2017893
The ModelC paper bail pressure arms have been modified to insure
restoring of the paper bail to its rest position. The camming sur-
face of the left and right hand spring-loaded pressure arms have
been modified as shown in the illustration below. The bail arm
rollers have been slotted to keep the pressure arms on the roller.
Part numbers of the pressure arms and paper bail arms remain the
same.
-.....!!E:'"'""-~-_ MODIFIED CAMMING
SURFACE
MULTIPLE COpy CONTROL OPERATION IMPROVED
The platen guide detent, PIN 1115250, has been modified to pro-
vide increased travel when the lever is moved to the Band C posi-
tions. The modified part may be installed in earlier machines.
EASY ADJUSTMENT - LINE GAGE CARD HOLDER
The Model C rear cover screw (PIN 1117337) may be used as a
lever to adjust the line gage card holder. By inserting the head of
3
this screw in the dust cover slot as illustrated, the card holder can
easi Iy be brought away from the platen.
CARD HOLDER
REAR COVER
SCREW IN SLOT
DUST COVER
"Y/IIII--- RAIL
CARD HOLDERS
Installation of Model C card holders on Model BET's with new
front rail dust covers will help to hold small cards more firmly
against the platens.
SPRING LOADED INNER CARRIAGE TO REDUCE IMPRESSION
TROUBLE
The inner carriage on any Model C may be spring loaded to pre-
vent floating. Install PIN 1116137(L.H.) and PIN 1116138 (R.H.)
new style springs and two spring anchors, PIN 1013363, as shown
in the illustration below.
Form Anchor Here
PiN 1116137 or
1116138, spring
The former method of spring loading the inner carriage used a stud,
PIN 1115316, and spring, PIN 1115331 (see CEM 532A). Field
replacement of this stud is impractical, however, the method shown
in the illustration can be used if the stud, PIN 1115316, breaks.
REINSERTING PAPER CORRECTLY ON WRITING LINE
To prevent the paper from rising above the writing line when the
feed rolls are engaged after reinserting paper, two springs may be
installed from the front feed roll shaft to the rear feed roll shaft.
These springs should be positioned between the last two feed rolls
on each end. Convenient springs to use are the Model A, B, & C
4
cam lever spring, PIN 1071318, or the Model 01 typebar spring,
PIN 1090341. The springs will cause the deflector to tip back
slightly, preventing the paper from buckling in the area of the front
feed rolls. Caution: The spring tension must be reduced to pre-
vent the front Iips of the deflector from touching the paper. If this
is not done, marking of the copies may result.
FORM DEFLECTOR FOR FORMS TEARING ON ROLLBACK
Tearing of continuous forms during rollback may be traced to the
form catching on the front lips of the deflector. The front lips may
be formed outward as illustrated to remedy this condition. Caution:
After forming, be sure the front scale clears all obstructions with-
out binding.
PEEN FEED ROLL RELEASE LINK FOR GREATER THROW
Sometimes the feed roll release mechanism will not lock securely
in the "release" position. The problem is that the front portion of
the feed roll release link does not travel sufficiently far to "lock".
This link may be carefully peened, avoiding replacement. Re-
moval of the link from the machine is unnecessary. By removing
the feed roll release lever, the back portion of the link maybero-
tated upward, allowing easy access for peening the front top of the
link.
QUICK INSTALLATION - UNDERPRINTING SHIELDS
Modify underprinting shields, PIN 1260385, as illustrated for easy
insertion and adjustment.
Beveled Sides Enlarged Slots
5
The beveled sides make insertion easier and the enlarged slot makes
vertical adjustment easier after the shield is in place.
EASY METHOD - FEED ROLL RELEASE LEVER INSTALLATION
When installing thenewstyle feed roll release lever, B/M1271259,
the following steps will save time:
1. Nove the feed roll release lever to rear.
2. Remove platen.
3. Remove feed roll reI ease Iever and ri ght hand end cover.
4. Lift the rear of the feed roll release link and break off rear
bel/crank with duckbi lis and longnose pliers. Snap the rivet
out with the duckbills.
5. Install stud PIN 1115114 and nut PIN 1090037 through new
style bellcrank PIN 1115113, then install new style bellcrank
on former style feed roll release link.
6. Check to see if the bel/crank clears the tab rack final stop. If
it clears, leave the old one in. If it interferes, break the end
of old stop, then pull it out the top. To install new stop, push
tab fulcrum wire to extreme left, which allows the new stop to
slip down with very little interference with the paper bail
shaft.
7. Replace the parts removed in steps 2 & 3 and tighten bell-
crank screw PIN 1115212.
ORDER BLACK ASPHALT SOUNDPROOFING BY THE FOOT
The black asphalt soundproofing used in deflectors will be shipped
by the foot under PIN 1115998. One foot of wrapping paper con-
tains five strips of soundproofing. Therefore, if five feet of sound-
proofing are needed, order "one foot of PIN 1115998." This is a
CE Maintenance Supply item. It is not for sale and not to be in-
cluded in inventories.
LOOSE REPOSITIONING INDICATOR LEVER MOUNTING SCREW
A thinner washer, PIN 1090222, is now used in place of reposi-
tioning indicator lever washer, PIN 1090269, under the reposi-
tioning indicator screw, PIN 1110241. This permits crimping of
the screw threads after installation to prevent loosening.
CARRIAGE RETURN 203
MARGIN CONTROL BELLCRANK REPLACEMENT
When replacing the margin control bel/crank PIN 1117433, the
mounting stud PIN 1117434 and mounting nut PIN 1090037 should
be adjusted so the bellcrank, while still free to rotate, has a min-
imum of side play. Because of manufacturing specifications the
6
shoulder of the stud is .050" long while the thickness of the bell-
crank is .062". From this it can be seen that tightening the stud
completely will bind the bellcrank. The correct procedure is to
adjust the stud for proper side play of the bell crank and then tighten
the stud lock nut.
CORRECTION TO CEM #525
B/M 1265134, Margin Control Bellcrank and Stud, was erroneously
stated to contain Part No. 1117434, margin control bellcrank
mounting stud. This B/M actually contains PIN 1117425, margin
control bellcrank stop stud. Make this correction to CEM #525.
CARRIAGE RETURN AND TENSION TAPES COLOR CODED
Model C carriage return and carriage tension tapes are now color
coded for easy identification. Colored thread is used to sew them
together at the ends. The colors are as follows:
13" - Black 24" - Blue
17"-Red 30" - Green
20" - White
RETURN TAPE - CARRIAGE
If clutch pulley tension spring fails to keep proper tension on car-
riage return tape during operation, it mi ght be caused by inter-
ference of switch operating link with the clutch pulley assembly.
Reposition link by forming.
CARRIAGE RETURN TAPE WEAR - ANTI-WHIP GUARD SLEEVE
A polyethylene sleeve PIN 1263965 is available for field install-
ation on the anti-whip guard of the clutch lever bracket. The
sleeve wi (( el iminate the possibi lity of the return tape whipping out
from under the guard and becoming frayed.
CLUTCH LEVER ASSEMBLY MAY CAUSE LOCK-UPS
Carriage return lock-up may be caused by distortion of the cI utch
lever assembly, PIN 1117481. The vinyl plastic sleeve on the
anti -whip guard sometimes presses on the power frame. This pres-
sure may distort the clutch lever assembly. Cut the sleeve tip if it
is too long. Present production parts are hardened to prevent dis-
tortion. Some machines with the soft lever assemblies have a small
outer reinforcing bracket, Part No. 1115942, mounted outside the
clutch lever bracket with longer clutch lever mounting screws,
Part No. 38281.
7
CLUTCH LEVER BRACKET ASSEMBLY STRENGTHENED
The clutch lever bracket assembly, Part No. 1117841, has been
strengthened by the addition of material and by heat treating to a
harder degree. This wi II reduce carriage return fail ures due to
bending of this bracket. The anti -whip guard has been lengthened,
eliminating the need for the plastic sleeve. The plastic sleeve will
remain available for field use.
EASY METHOD - OBSERVING CLUTCH UNLATCHING LINK
ADJUSTMENT
To check the Model C clutch for unlatching during the last 1/64"
to 1/32" of the carriage travel, do the following:
1. Hold the carriage to the right.
2. Push the rear of the clutch lever to the left, almost to the
latching position.
3. The rear of the clutch latch should clear the upright lug of
the clutch lever by 1/64" to 1/32", as illustrated.
CARRIAGE RETURN CLUTCH PLATE IMPROVEMENT
The clutch plate insert is now counterbored deeper to prevent the
end of the power roll shaft from contacting the insert. An accum-
ulation of tolerances could formerly cause the power roll shaft to
contact the insert, thereby reducing clutch pressure.
SPRING SCREW STARTER USE TO REPLACE CLUTCH PLATE
Due to the limited space between the machine frame and the bottom
case it is difficult to replace the clutch plate and insert assembly
(Part No. 1071425) on the Model C ET. The spring screw starter
8
may be used as a holding device to lower itinto position. This saves
fumbling.
MARGIN CONTROL BELLCRANK ADJUSTING SCREW
This screw has been hardened and is now black Du-lite. The old
and new parts are interchangeable. Part numbers are as follow:
Old PIN Price New PIN Price
641 $.01 1116031 $.05
DECELERATOR - GOVERNOR 205
CENTRIFUGAL GOVERNOR BINDING
Occasionally the centrifugal governor bronze shaft bushing is as-
sembled too far into the governor housing, causing the pinion gear
to bite into and bind on the governor housing. This results in re-
tarded carriage movement and type crowding.
This condition can be overcome by placing a thin shim #1090058
between the gear pinion and the governor housing.
INSUFFICIENT SIDE PLAY - CARRIAGE RETURN & TABULAR
DECELERATOR ARMS
The Model C1 Reference Manual Section (form 241-5002-0), page
25, outlines adjustments for positioning the spring clutch collars
on the shaft to allow the decelerator arms to rotate freely without
exceeding .003" end play on this shaft. Overall play in the shaft
is given as .003" also.
Plant tests conducted on defective assemblies returned to Lexington
indicate that these tolerances may be incorrect. The correct tol-
erances are .003" to .005" on both the spring clutch collar and
the end play of the shaft. The Reference Manual is to be changed
accordingly.
9
When making these adjustments check for interference between the
drum gear assembly and the centrifugal governor collar.
POSITION OF CARRIAGE RETURN SPRING CLUTCH CLAMP
PART NO. 1117571
Failure of the decelerator to operate properly on carriage return
can often be traced to the position of the decelerator spring clamp
on the spring clutch. This clamp should be positioned so as to over-
lap the decelerator hub assembly, P/N 1117570, by 1/16".
ARM MOVEMENT IN RESTORING - CARRIAGE RETURN AND TAB
DECELERATOR ARMS - BELOW STD SERIAL 1228698 AND EXEC
SERIAL 2032766
Reports have indicated that the clutch springs may be too long.
This can restrict the movement of the decelerator arms. If this
problem cannot be corrected through incr~asing the side and end
play adjustments previously mentioned, the offending clutch spring
should be replaced.
The ends of the spring clutches nearest the decelerator arms may
have sharp ends which retard arm movement. Stoning or careful
forming will correct this.
BINDING ON CARRIAGE RETURN - BELOW STD SERIAL 1228698
AND EXEC SERIAL 2032766
In a limited numberof deceleratorassemblies of recent manufacture
the chamfer on the decelerator hub assembly, P/N 1117570, has
been excessive. The amount of chamfer should be held to .005"
but in some cases it was found that some have approximated .014".
A bind in the carriage return decelerator cam arm, P/N 1117568,
can be caused by a loop of the carriage return spring clutch that is
allowed to drop into the excessive chamfer.
Binds may also be caused by chips becoming dislodged from a chip-
ped chamfer edge which lodge under the carriage return spring
clutch. Erratic deceleration on carriage return and failure of the
carriage return decelerator arm to restore are symptoms of this. The
tolerances between the spring clutch and their operating surfaces
are very small. Almost any amount of foreign material in this area
wi II cause a bind.
If either of these conditions is a problem, remove the hub assembly
P/N 1117570 and the spring clutch. Carefully clean the spring and
its operating surfaces; lubricate with molycote; and reassemble. If
the hub is suspected, replace it.
10
DEFECTIVE BRISTO SET SCREWS 1 PIN 257969
Bristo set screws 1 PIN 257969/ used to hold the decelerator hub
and collars l may be found difficult to loosen and tighten. This is
because of broken splines in their heads. Replace them with ac-
ceptable set screws of the same part number.
CHECK GOVERNOR COLLAR FOR DECELERATOR FAILURE
What may appear to be intermittent decelerator failure (carriage
returning hard - no governor action) may actually be a loose gov-
ernor pinion gear. Both the inner and outer set screws in the gov-
ernor collar must be tight to secure this gear to the governor shaft.
CARRIAGE TENSION TAPES
To prevent carriage tension tapes from coming off the tension tape
pulleYI a C clip (PIN 60488)1 or a grip clip (PIN 1115058)1 may
be installed to the rear of the pulley on the power frame boss.
CARRIAGE TENSION TAPE PULLEY CHANGED TO NYLON
The carriage tension tape pulley 1 PIN 1115936 1 is now made of
nylon. It is mounted to the power frame using screw 1115939 1 nut
1090037 1 and spacer 1092168. Add the part number of the spacer
to mechanism 205 and 305 sections of the 1960 Parts Manual.
ESCAPEMENT 206
TYPE PILING
Occasional type piling may be caused by the escapement trip
link clevis. If the clevis is too tightly closed l it will grip the
escapement "U" bar during spacebar operation instead of sliding
in the elongated slot. This prevents the trip lever from restoring l
causing an occasional condition of piling.
TYPE PILING - CLUTCH PULLEY BINDS
Occasional type piling may sometimes be traced to the switch
operating link binding on the clutch pulley assembly. To cor-
rect this condition l invert the switch assembly on its mounting
and reconnect the switch link. Switch assemblies are inverted in
present manufacture.
INTERMITTENT TYPE PILING
Intermittent type piling can be caused by the tab decelerator
bellcrank PIN 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.
11
ADDITIONAL "C" NOISE REDUCTION
A small plastic snubber (PIN 1118848) is now used on the ends of
the universal bar to reduce the ringing noise of the U-bar as it
strikes the rear of the segment. This improvement is now going
into all C's above approximate Standard serial #1163613 and
Executive serial #2017893.
SNUBBER
ESCAPEMENT TRIP LEVER IMPROVEMENT - C STANDARD
The camming surface of the escapement trip lever has been
lengthened to prevent the escapement lever from going under the
trip lever and hanging up. New style escapement trip levers may
be installed on ET's prior to SIN 1246128 if hanging up cannot be
cured by minimizing escapement lever overthrow.
ESCAPEMENT PAWL WEAR, PART #1117961 & 1117962
Changes in the hardening process of the escapement ~awl and
escapement rack were made in all machines after serial 1164288.
If escapement pawl wear occurs on machines below this serial
number, the escapement rack must also be replaced or the trouble
will recur.
EXEC U-BAR ADJUSTING PLATE USED ON STD ET'S
The Executive universal bar adjusting plate, PIN 1108610, is
now being used on all Model C's in production to facilitate ad-
justment of the escapement trip link clevis. The Executive plate
replaced the Standard plate, PIN 1107812. Make the substi-
tution on Page 9, Reference No.8, Model C Section, 1960 Parts
Manual. Former style Standard plates will remain available for
Field Service until present parts in stock are depleted.
EXECUTIVE ESCAPEMENT PAWLS
All Executive escapement pawls should. be washed before assem-
bly. This applies with new parts as well. Some escapement fail-
ures, immediately after the installation of new parts, have been
traced to sticky pawls.
12
EXECUTIVE ESCAPEMENT PAWL B/M 1270778, 1270779, AND
1270780
The B/M's now include eight escapement pawl springs, one es-
capement pawl pi n, and one escapement pawl stop. The pri ces
of these B/M's will remain the same until the next general price
revision.
EXECUTIVE ESCAPEMENT FAILURE
Check for a loose rail support bracket screw, PIN 1079999 (Ref
302 - 132). A lockwasher is now being installed under this screw.
KEYBOARD LOCK & BELL 209
OVERPRINTING AT RIGHT MARGIN
If a timing condition exists between the operator and the machine,
at the right margin, replace the rear linelock link #1117450 with
a spring. This can be made by cutting a 1 1/4" piece from a type-
bar rest pad spring #1105694.
In many cases an operator wi II release a key at the ti me when the
linelock bai I contacts the keylever. This partially depressed key-
lever will prevent the linelock bail from operating and permit over-
printing.
INTERFERENCE WITH LlNELOCK SPRINGS
The actuating arm of the carriage return keylock may interfere with
thelinelock barsprings. If this condition exists, it maybe necessary
to form the portion of the carriage return keylock that contacts the
switch lever indicator.
QUICK LlNELOCK ADJUSTMENT - MODEL C
On Model C ET's equipped with removable keyplates, it is easier
to make linelock adjustments from the front of the machine. Re-
move the keyplate and form the lug on the linelock bar with a T-
bender. This saves rear cover removal and clevis adjustments.
LOUDER BELL FOR MODEL C ET'S
The bell on Model C El's may be inaudible above office noise. The
Model B bell, Parj- No. 1105753, is louder and may be readily sub-
stituted in the Field to provide a louder bell.
MODEL B BELL - INTERFERENCE WITH CARRIAGE
If the leather washer under the Model B bell stretches and rides
partially over the stud the bell will become cocked. This may cause
13
the carriage to hang up on the bell. The leather washer may be re-
moved without appreciably changing the tone of the bell.
MARGIN 210
CORRECT ADJUSTMENT - FINAL L.H. MARGIN STOP ECCENTRIC
Occasionally a final L. H. margin stop eccentric screw, PIN
1072684, may shear off in the margin rack. This may be a result
of the final stop taking the force of carriage return when the margin
is set at zero and the margin slider pin assembly has failed to bot-
tom in a rack tooth.
To insure this condition does not exist, check machines for the fol-
lowing adjustment:
Adjust the final L. H. margin stop eccentric so that the margin slider
and pin assembly bottoms freely in the margin rack teeth with the
margin set at zero. The margin stop should not be in contact with
the fi na I stop eccentri c when the margi n is set at zero.
Incorporate the above adjustment as adjustment #4, page 16, of
the Model C1 Section, ET Reference Manual.
EASY METHOD - FUTURE MARGIN SET BRACKET REMOVAL
When installing the replacement backspace bell crank stud assembly,
BIM 1271216, also remove the margin set bracket and file a por-
tion from the right screw slot as illustrated. This will make it un-
necessary to remove the backspace stud screw when the margin set
bracket is removed in the future. By loosening the screw, the mar-
gin set bracket can be pivoted past the screw and removed.
QUICK FIX FOR MARGIN SET LEVER JAMMING UNDER CAR-
RIAGE BEYOND R.H. MARGIN
Margin set levers may be easily stopped from jamming under the
carriage end plate as follows:
Remove the L. H. tab check lever keeper screw (PIN 1115735, page
23, reference 25, 1960 Parts Manual). Place any suitable washer
under this screw and replace it. The head of the screw being raised
14
by the washer will prevent the margin set lever, which is directly
above the screw head, from going low enough to permit the car-
riage to ride up and over the margin set lever. Engineering has
added material to the margin set lever to eliminate this problem.
MARGIN SET LEVER BRACKET CHANGED TO POLYPROPYLENE
The margin set lever bracket, PIN 1115572, has recently been
changed to polypropylene. The part number remains the same. To
prevent spreading of the polypropylene, washers are now used be-
tween the head of mounting screws and the bracket. Add washer
PIN 1091338 to the 1960 Parts Manual.
c
POL YPROPYLENE BRACKET
CHECK L1NELOCK BAR SPRING FOR R. H. MARGIN SET TROUBLE
The linelock bar spring, PIN 1072703 (the small spring under the
switch lever)~ may cause the margin stop to move to the right
enough to miss the correct groove in the margin rack as the margin
set lever is released. This would cause the margin to set one space
to the right of the desired number.
This spring's tension may be reduced to a point where it will not
cause the above troub Ie. The tensi on shou Id not be reduced to a
point where the I inelock bar wi II not restore.
IDENTIFICATION OF MULTI-TOOTH MARGIN STOP SLIDERS
10 pitch and 12 pitch multi-tooth margin stop sliders may be iden-
tified by observing the tooth formation as illustrated below.
12 PITCH 10 PITCH
MOTOR & DRIVE 211
14 - 16T MOTOR PULLEY STILL AVAILABLE
The 14 - 16T motor pulley, PIN 1100536, is obsolete but is still
available in a limited number. It can be ordered on a regular P &
S Requisition.
15
POWER ROLLS - CARE IN HANDLING
Occasionally power roll shafts seem to be too large to fit into the
power roll bearings. This is the result of tiny nicks or burrs on the
shafts caused by rough handling. Light filing of the ends of stub-
born shafts will remove this type of flaw and should be tried even
if the shaft appears to be undamaged. Use care in handling and
storing power rolls to avoid damage.
POWER ROLL DATE CODING
The plant is now date coding all power rolls. Coding on power
roll P/N 1117828 began on 12-15-59 and Part Numbers 1001328
and 1071300 codi ng began on 1 -4-60.
This coding can be found on the power roll between the backspace
cam and letter cam 43. The first one or two digits indicate the
month of manufacture and the last digit the year of manufacture.
Thus, a power roll manufactured during January of 1960 would
carry a 1 -0 code number and a December 1960 power roll a 12-0
code number.
It should be kept in mind that power rolls should be stored in a
vertical position and shelf life should not exceed six months for
maxi mum performance.
MODIFIED INTERNAL PLUG ELIMINATES WIRE CUTTING
All Model C Standard and Executive machines are being shipped
with a hooded and modified internal plug and cord assembly (Part
No. 1117600). This change became effective with Standard serial
number 1232911 and Executive serial number 2033659.
This plug has the machine screw ground pin and wire positioning
pins for safety which REMOVES THE NECESSITY FOR CUTTING
THE GREEN GROUND WIRE. With this plug and cord it is now
impossible to internally short the hot lead and the groundl