Universal HPL-100NI-NP User manual

1
NON-POROUS
LARGE CAPACITY HAND PRINTERS
ALL MODELS
UNIVERSAL STENCILING & MARKING SYSTEMS, INC.
P.O. BOX 871 - ST. PETERSBURG, FLORIDA 33731 USA
PH: [phone] FAX: [phone]
E-Mail: [email protected] Website: www.universal-marking.com
STENCILING & MARKING SYSTEMS
HPLNP-22115
OWNER’S MANUAL
INSTALLATION - OPERATION - MAINTENANCE

2
PREFACE
SPECIFICATIONS
HPL-100-NP Series
HPL-200-NP Series
Indexing&Non-IndexingModels
SelectinganAppropriateInk
Printing Dies
Metric Printing Dies
InkRolls
QUICK START
Pre-inkingXF Neoprene InkRolls
Installingthe Pre-inked Roll
Installing the Printing Dies
Adjusting the Ink Roll / Die Face Contact Pressure
Adjusting the Ink Roll Eccentric
PrintingDie Positioning forIndexingApplications
MAINTENANCE
Cleaning the Transfer Roll
Cleaning the Coder
Cleaning the Printing Dies
PRINTDRUMINDEXMECHANISMMAINTENANCE
Print Drum Index Mechanism Disassembly/Assembly
Replacing Print Drum Index Springs
Removing & Replacing Index Block “B”
PARTSDIAGRAMSANDPARTSLISTS
IMPORTANT NOTE
UNIVERSAL products are manufactured to exacting standards and every available step has been taken to assure your
completesatisfaction. Itis mostimportant,for bestresults, that youread andcarefullyfollow theinstructionscontained inthis
manual. Failure to do so may result in unsatisfactory performance, damage to the equipment and personal injury.
- LIMITED WARRANTY -
UNIVERSALNon-PorousLargeCapicityHandPrintersareguaranteedtobefreefromdefectsinmaterialsandworkmanship
foraperiod of90days fromthe date ofpurchase. Components foundtobe defectiveduringthis timewillbe repairedfree
ofchargeif returned tothefactory. Damage resulting fromuseof improper inks,improperinstallation, oroperationis not
coveredunderthe scopeofthis warranty. Forwarrantyservice pleasecontactour CustomerServiceDepartment.
TABLE OF CONTENTS
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3
PREFACE
The specification section includes drawings with the basic dimensions of the printers, the net weights, maximum
die capacities, maximum print width and print drum circumferences. This section also lists the specifications for
the printing dies and an explanation of the indexing and non-indexing models.
PRINTER SPECIFICATIONS
1- HPL-NP Printers are available in Indexing models (spot printing) and Non-Indexing models (continuous
printing).
2- Universal’s die system allows text information to be set using individual characters or one piece logo
dies.
3 - Custom logo dies can also be produced from camera ready copy.
4 - Precision machined from aircraft grade aluminum alloys and stainless steel for mimimal maintanance
and superior long term performance.
5 - Component parts have a black anodized finish for corrosion resistance.
6 - Permanently lubricated, sealed ball bearings which provide for extremely accurate, low friction drum
rotation.
7 - Stainless steel shafts for durability even in harsh environments.
8 - Indexing mechanism with dual compression springs mounted over stainless steel guide rods
minimizes spring breakage and provides unsurpassed indexing speed and accuracy.
TheUniversalHPLNon-PorousHandPrintersweredesignedtoprintlotnumbers,datecodes,andtextinformation
onmetal,plastics& other non-porous surfaces. Universal LargeCapacityHandPrinters are precision engineered
to give years of reliable service under the most demanding conditions.
QUICK START
SEE PAGE 9
This manual was written with a full understanding that very few people like to read manuals or have the
time to do so. To accommodate those who have little time to spare we have included a Quick Start
section which will get your printer operating in just a few minutes.
FEATURES

4
SPECIFICATIONS
HPL-NP PRINTER SPECIFICATIONS
HPL-100-NP SERIES
Model Shown: HPL-100NI-NP
NET WEIGHT: 7.03 LBS. (3.19 KG)
MAXIMUMDIESIZE - USSTANDARD: 1”(7RIBS) X 16-15/16”LENGTH
MAXIMUMDIESIZE -METRICCODERS ONLY: 25.4MM(7 RIBS)X430.2 MMLENGTH
PRINTDRUMCIRCUMFERENCE: APPROXIMATELY18" (457 MM)MEASUREDAT DIEFACE
17.19”
436.6MM
16.41”
416.8MM
6.71”
170.4MM
3.68”
93.5MM
1.04”
26.4MM
8.45”
214.6MM
5.74”
145.8MM

5
SPECIFICATIONS
HPL-NP PRINTER SPECIFICATIONS
HPL-200-NP SERIES
Model Shown: HPL-200NI-NP
NET WEIGHT: 8.23 LBS. (3.73 KG.)
MAXIMUMDIESIZE - USSTANDARD: 1-15/16”(14 RIBS)X16-15/16”LENGTH
MAXIMUMDIESIZE -METRICCODERS ONLY: 49.2MM (13RIBS)X 430.2MMLENGTH
PRINTDRUMCIRCUMFERENCE: APPROXIMATELY18" (457 MM)MEASUREDATDIEFACE
17.19”
436.6MM
16.41”
416.8MM
6.71”
170.4MM 5.58”
141.7MM
1.95”
49.5MM
8.45”
214.6MM
5.74”
145.8MM

6
SPECIFICATIONS
Universal HPL Non-Porous Hand Printers are available in both indexing and non-indexing models.
FIGURE1
Indexingprintersfeatureaprintdrumindexingmechanism
whichprovidesprintregistrationcapabilitieswhenprinting
on individual parts. When the printer is lifted off the
surface, after the print operation, the print drum
automaticallyrotatesbackto the same startingor“home”
position. Printing with an indexing printer will allow the
imprinton each part tobe registered in thesame position
relativeto the positionwhere the printdrum first contacts
the part.
STAINLESSSTEEL
GUIDEROD
COMPRESSION
SPRING
Non-indexing printers provide random print registration
capabilities. These printers have print drums which
simply rotate on bearings and repeat the print at an
interval equal to the circumference of the print drum. If
your application requires the print to be repeated at
shorter intervals than the circumference print drum,
duplicate sets of dies can be installed on the print drum.
Non-indexingprintersaregenerallyusedforwebprinting
applications where the print drum stays in contact with
the web over long distances.
Note: It is extremely important to test the affect of other manufacturer’s ink on the XF Neoprene ink roll.
Since the ink roll must fit into a precision machined cavity in the inking system housing with little clearance,
swelling of the roll, in reaction to non-compatible solvents in the ink, could cause serious problems with the
performanceofyourcoder.InkscontainingMEKorpetroleumsolventssuch as Xylol orToulenearenotcompatible.
ThedryXF neoprene ink rollmeasures3.425" (86.99 mm)OD. Afterthoroughlysaturatingthe ink rollwithink, the
roll should not exceed 3.500" (88.90 mm) OD.
SELECTING AN APPROPRIATE INK
Universal’s Non-Porous Inking System is compatible with a wide range of alcohol base marking inks. Although
weoffer avariety of inks for specific applications, you are notrestricted tousing only Universal brand inks. When
selecting inks from other manufacturers however, it is your responsibility to make sure the inks are compatible
with the coder.
Dye base inks contain liquid color which is translucent and will provide good color contrast only on light colored
materials. Theseinks are generallyfaster drying than pigmented inksand normally produceless residue buildup
on the transfer roll and printing dies, thus requiring less frequent cleaning of the coder. Although dye base inks
are normally the easiest to use, they will fade more rapidly than pigmented inks when exposed to direct sunlight.
Pigmented inks contain finely ground solids which are opaque, providing much greater color contrast when
marking on dark colored surfaces. These inks also resist fading when exposed to direct sunlight. Pigmented
inks have a tendency to build up on the surface of the transfer roll and the die face more rapidly than dye base
inks and will generally require more frequent cleaning of these parts.
INDEXING AND NON-INDEXING MODELS

7
SPECIFICATIONS
FIGURE2
BEARER RING
.008 - .010”
PRINTING DIE
DRUMCOVER
FIGURE3
RIBtype® PRINTING DIES
METRIC RIBtype® PRINTING DIES
Printing dies are manufactured to precision thickness
tolerances which are very critical to the performance of
these coders. When installed, the face of the printing
dieshould extend only.008” - .010”beyond the radius of
the Bearer Rings as shown in Figure 3. Using dies that
do not meet the design specifications will result in poor
print quality and possible damage to the transfer roll.
Although there are several competitive rib backed die
systems available, it is very important to note that they
are not all made to the same rib spacing or thickness
specifications and they are not interchangeable.
Universal also offers Metric RIBtype® die systems for use in countries where metric character sizes are the
standard. The Metric dies are thicker and the rib spacing differs slightly from the standard printing dies therefore
the two versions are not compatible. To accommodate the differences, the print drums for Metric dies are
machined to a slightly different diameter from the U.S. versions.
The coder model numbers on Metric coders will have a “-T” suffix and the Metric Drum Covers have a distinct
pinkcolor.
Universal HPL Non-Porous Hand Printers are designed to use
RIBtype® printingdieswhich have a moldedribbacking. The ribs on
the back of the die snap into mating ribs in the Drum Cover on the
print drum as shown in Figure 2.
The standard printing dies are available in sets with many sizes and
character styles. The sets are a combination of individual alphabetic
and numeric characters or in sets containing numeric characters
only. These character sets or “sorts” can be used to make up text
messages and code numbers as necessary.
Printing dies are also available in “logo” form in which a complete text message, company logos or trademarks
are produced on a single piece of rib backed rubber. These “logo” dies are photographically reproduced from
black and white art work. Due to their unitized construction, these dies generally produce better print quality and
are much faster to change in the field. For details on ordering custom logo dies, please contact our Customer
Service Department.

8
SPECIFICATIONS
INK ROLLS
XF NEOPRENE INK ROLLS
Universal’sXFNeopreneInkRollsaremadefromanextra
firm density neoprene material. The extremely fine cell
structure of these rolls provides exceptionally good print
quality particularly when using small character printing
dies.
Universal offers two ink roll options for the HPL Non-Porous Hand Printers. Each has a unique characteristic
suitable for a specific printing application. The printers are designed to accommodate both types of ink rolls
without modification. Adetailed review of your printing requirements will determine the best choice of ink rolls for
your particular application.
FIGURE4
Unless otherwise specified, all new HPL Non-Porous Printers are supplied with XF Neoprene Ink Rolls
FIGURE5
TYPE MT INK ROLLS
Type MT Ink Rolls are disposable pre-inked rolls which
provide excellent color density and adhesion on most
materials. These disposable rolls yield up to 500,000
impressions in average usage and will dry in 4 -7 seconds
at 75 degrees F. ambient temperatures on most non-
porous surfaces. The roll is simply installed on the coder
and replaced when the ink capacity is depleted. The MT
Ink Rolls contain a fast drying solvent based ink and are
designed for use with all of our Non-Porous Coders.

9
QUICK START
PRE-INKING XF NEOPRENE INK ROLLS
3- Using a round shaft or screwdriver, remove the roll from
the container. Roll the ink roll across a clean piece of
paper or cardboard to remove the excess ink.
Note: Inkswill stainclothing, furniture,carpetingand yourhands. Rubber glovesshould bewornduring thefollowing
procedures.
1- Remove the dry roll from the plastic bag. Pour ink into a
clean container large enough to accommodate the size
of the ink roll.
2- Place the roll on it’s side into the container. Using your
finger tips, press down firmly on the side of the roll.
Continue to press down on the roll while rotating it in
the container. Flip the roll over in the container and
repeat the process until all of the ink is absorbed.
As you press down on the ink roll you are forcing the air out of
the roll material which allows the ink to be absorbed.
It is important to the performance of the printer that the ink
roll is fully saturated but not dripping wet.
For a 1-1/8” face roll pour approximately 4 ozs. of ink into the
container, for a 2” face roll pour approximately 8 ozs.
FIGURE6
FIGURE7
FIGURE8
Universal HPL Non-Porous Hand Printers are shipped from the factory fully assembled and, unless otherwise
specified, includes a dry XF Neoprene Ink Roll. The initial inking of any dry roll is critical to the preformance of
the Printer. The ink roll must be manually pre-inked prior to use.
If you received a dry ink roll with your printer, follow the inking instructions below to insure that your ink roll is
properly inked before installing it on your Printer.
If you received a pre-inked ink roll with your printer,skipthisprocedureandgotothenext pageforinstructions
onroll installation.

10
The ink roll you install on the coder must be properly pre-inked. If your coder was supplied with a dry XF
Neoprene ink roll, refer to page 9 for inking instructions.
Warning: Non-Porous inks contain flammable solvents. Do not smoke or handle these rolls in the
presence of sparks or open flames. Inks will also stain clothing, furniture, carpeting and your hands.
Rubber gloves should be worn during the following procedures.
INSTALLING THE PRE-INKED ROLL
This moves the Ink roller axle away from the Transfer
Roll and enables the ink roll to be installed without
interferencewith theTransferRollduringreassembly of
the inking system.
TheCoverRetainingKnobholdstheentireinkingsystem
together and other parts may fall free from the coder if
not held securely when this knob is removed.
The Knurled Drive Wheel Cover has a very loose fit.
Notethatoneedgeof theDriveWheelCoveris flatand
is aligned towards the print drum. During reassembly,
this flat edge must be replaced in the same position.
Rollers that have been pre-inked at the factory are normally slightly oversaturated with ink to compensate for
potential solvent loss during shipping and storage. If you received a pre-inked ink roll with your coder, it is
importantto examine theroll prior toinstallation. The ink roll should be thoroughly saturated with ink but not
dripping wet. Excess ink can be easily removed by lightly rolling the ink roll across a clean piece of absorbent
paper.
1 - To install the pre-inked roll, first turn the Ink Roll
Eccentric Adjusting Knob “A” to the “MIN” position.
2 - While holding the Drive Wheel Cover “B” in place,
remove the Knurled Cover Retaining Knob “C” by
turning it counterclockwise.
3 -Hold Inking System Cover “D” in place and remove
Knurled Drive Wheel Cover “B”.
FIGURE9
FIGURE10
QUICK START
FIGURE11
A
B
C
B
D

11
TheKnurled DriveWheelrestsontop oftheTransferRoll
“G”. The Transfer Roll has 3 stainless, protruding drive
pinswhich fitthrough 3matingholesintheKnurledDrive
Wheel “E”. This is a close tolerance fit and there will be
some resistance from the engagement with the rubber
Bearer Ring on the Print Drum when this is removed. A
slightrotationorwigglingaction willmakeremovaleasier.
4 - Remove the Knurled Drive Wheel “E”.
Rollswhichhavebeen pre-inkedatthefactoryaretypically
oversaturatedwithinkto compensateforpotentialsolvent
loss during shipping and storage. Installing an over
saturated roll on the coder will result in ink leakage from
the Inking System and in extreme cases may damage
the ball bearings in the Transfer Roll. When the roller is
installed,itmust bethoroughlysaturated withinkbut you
should not be able to see any liquid ink on the surface of
the roll. If necessary, blot excess ink from the sides of
therollwith a dry papertowelbefore installation.
The Transfer Roll Surface is a finely engraved Delrin
plasticmaterialwhich can beeasilyscratched. When
assembled, the Transfer Roll resides in a very close
fittingcavity intheInkingSystemCover. Carefully pull
the Inking System Cover directly away from the
Baseplate until it clears the Transfer Roll to prevent
damagetotheTransferRoll surface.
You want to keep ink off your gloves at this stage to
preventcontaminationoftheexternalpartsofthecoder
duringrollinstallation.
5 -Carefully pull the Inking System Cover “D” directly
away from the Inking System Baseplate “F”. Do not
let the cover drag across the surface of the Transfer
Roll “G”.
6 - Put on a pair of rubber gloves, open the storage
container and remove the pre-inked ink roller by
inserting a small rod (a pencil or a screwdriver works
nicely) in the center of the core.
7 -Inspect the roller for excess surface wetness.
Remove any excess ink by rolling the roll lightly over
a piece of absorbent paper.
FIGURE12
FIGURE13
FIGURE14
QUICK START
E
D
F
G
FIGURE15
G

12
Whenthisstepiscomplete,removetherubbergloves
to prevent ink contamination with the external parts
ofthecoder.
Whilehandlingthe ink rolls,solventswill evaporate from
the rolls very rapidly at normal room temperatures. The
InkingSystem Covermustbereplacedquicklytoprevent
solventloss.
A slight wiggling action or rotation of the Drive Wheel will
help overcome the resistance caused by contact with the
rubber Bearer Ring on the Print Drum. The tops of the
stainless pins will be flush with the top of the Drive Wheel
whenseated properly.
HoldtheDrive WheelCover andInkingSystem
Coverin place.
8 - Install the ink roll on the Ink Roll Axle by aligning the end
of the rod or pencil with the end of the axle and pushing
the roll onto the axle.
9 -Immediately replace the Inking System Cover “D” by
carefully guiding the cover over the Transfer Roll “G”.
Try not to let the cover contact the surface of the Transfer
Roll to prevent scratching. Make sure the Cover is
seated properly against Baseplate “F”.
10 -Replace the Knurled Drive Wheel “E” by aligning the 3
small holes with the 3 stainless drive pins on the top of
the Transfer Roll “G” and pressing the Drive Wheel onto
the Transfer Roll.
11- Replace the Drive Wheel Cover “B” and rotate it into
position with the flat edge directly facing the Print Drum.
FIGURE16
FIGURE17
FIGURE18
QUICK START
FIGURE19
DG
F
G
E
B

13
Characterswhichhave onlya2 or 3rib backing donothave
the stability of the larger sizes when snapped into the drum
cover. Adding the rib backed type blocks on either size of
the code will provide added stability. The Type Blocks are
not as thick as the Type and will not pick up ink from the
TransferRoll.
The Cover Retaining Knob should be just tight enough
to keep the Inking System Assembly together and
prevent the Drive Wheel Cover from rotating out of
position.
INSTALLING THE PRINTING DIES
Individualcharacter codesortextmessagesareinstalledin
amirrorimage ofnormalwritten text. In otherwordsinstall
inaright toleft directionasshown. When printed,codesor
text installed in this orientation will print in normal left to
rightorder.
Tip: To make die installation easier, moisten a sponge with water containing a small amount of liquid
detergent. Lightly moisten the back of the printing die and then immediately press the die into the drum
cover. Do not apply too much liquid or the dies will slip during printing. Note: Do not apply silicone, oil
or any other lubricating agent to the rib backing or the dies will not hold properly during printing.
12 - Replace the Cover Retaining Knob “C” and lightly
tighten. Do not over tighten this knob or you may bend
the top of the Drive Wheel Cover “B” and cause it to
bind against the Knurled Drive Wheel.
1 - Install the Printing Dies “I” on the Print Drum “J” by aligning
the ribbed backing on the dies with the mating covering on the
Print Drum and pressing firmly until they are completely engaged.
It is best to install the dies as close to the middle of the print
drum as possible.
2 - When using small individual characters to make up a
code message, use the Type Blocking Kit “K” included
with your coder to support the leading and trailing ends
of the type as shown.
FIGURE20
FIGURE21
QUICK START
B
C
I
J
K
FIGURE22

14
ADJUSTING THE INK ROLL ECCENTRIC
As soon as you can see complete ink coverage on the die faces, stop rotating the eccentric. Proper adjustment
will normally be reached when the reference line on the Eccentric is somewhere between the 2 and 3 dial
position.
This adjustment procedure brings the Ink Roller into contact with the surface of the Transfer Roller which in turn
applies the ink to the face of the printing dies. Do not rotate the Ink Roll Eccentric Knob further than necessary
towards the “MAX” position or the excess contact pressure will squeeze ink out of the ink roll and may cause
dripping inside the cover.
With the printing dies installed on the print drum,
manually rotate the print drum continuously in one
direction while slowly rotating the Ink Roll Eccentric
Adjusting Knob “A” from the “MIN” towards the
“MAX” position. Turn the Eccentric Knob in small
increments and observe the face of the printing dies
for signs of ink between each adjustment.
1- With the Printing Dies installed on the print drum, rotate
the print drum to a position where the printing dies will
contact the transfer roll. Then loosen the position adjusting
knob and move the transfer roll into contact with the face
of the printing dies. Tighten the position adjusting knob
when the transfer roll contacts the face of the printing die
with just enough pressure to fully ink the die face.
The transfer roll should never be positioned so close
that it compresses the face of the printing dies.
ADJUSTING THE TRANSFER ROLL / DIE FACE CONTACT PRESSURE
The pressure the transfer roll exerts on the face of the printing dies should be just enough to rotate the transfer
roll and completely ink the face of the dies as they pass during printing. Excessive contact pressure will cause
smudging of the impression, and restriction of the print drum rotation.
QUICK START
A
POSITION
ADJUSTING
KNOB
FIGURE23
FIGURE24

15
Non-indexing models of the HPL Non-Porous Hand Printers do not offer print registration capabilities, therefore
mounting the printing dies at a specific location on the print drum is not important. On indexing machines, the
position of the die on the print drum will determine the location of the print on the carton.
The drawing illustrates the best die position
forindividualpart printing. Note: The leading
edge of the printing die should be positioned,
rotationally, upstream of the ink roll. When
the print drum is placed against the surface
of the part and pushed forward, the drum
begins to rotate in a counter-clockwise
direction. The printing die travels a short
distance and then contacts the transfer roll
where ink is applied to the die face. When
the die contacts the part, the mark is applied.
FIGURE25
PRINTING DIE POSITIONING FOR INDEXING APPLICATIONS
QUICK START
LEADINGEDGEOFDIE
INK ROLL
Theprinter should remainin contact with thesurface of theproduct and bepushed forward through onecomplete
revolution of the print drum. When it is lifted off the surface of the product, the print drum will automatically return
to the same starting position.

16
1 - Periodically, the inking system should be
disassembled and inspected for ink residue and
dust contamination. To remove ink contamination
from the surface of the machine, moisten a soft
cotton cloth with the appropriate ink solvent and
rub it across the contaminated area.
CLEANING THE TRANSFER ROLL
The surface of the transfer roll is made from DuPont Delrin material and the O.D. of the roll is finely engraved
which enables it to hold a uniform film of ink. This surface material is very fragile and under no circumstances
should you attempt to clean it with anything abrasive.
1 - To clean dust and ink residue from the surface of the
transfer roll, first remove it from the coder. Lightly
saturate a soft cotton cloth with the appropriate ink
solvent and gently rub the surface of the roll until it is
clean.
CLEANING THE CODER
Warning: Most of the ink solvents used for cleaning are flammable liquids. Follow all safety precautions
recommended by the manufacturer during this process.
FIGURE26
FIGURE27
Ifthe transferrollissubmergedinsolvent,thebearingswill
bepermanently damaged.
The frequency of required cleaning can be greatly
reduced if the inking system is kept in proper
adjustmentduringnormal operation andifthe ink roll
doesnotbecome over saturatedwithink.
DO NOT SUBMERGE THE TRANSFER ROLL IN SOLVENT!
MAINTENANCE

17
3 - Blot the surface of the die with a clean paper towel to dry
the dies, as shown, and reinstall the clean dies on the coder.
CLEANING THE PRINTING DIES
1 - Place the contaminated Printing Die on top of several layers
of paper towels to absorb the excess solvent. Pour just
enough solvent on the face of the die to cover the die face.
2 - Using the toothbrush, carefully scrub the face of the die
to remove the contamination and old ink as shown. Add
more solvent as necessary and repeat the process until
the die is clean.
FIGURE28
FIGURE29
FIGURE30
Do not submerge or soak the dies in solvent as this may cause
swellingoftherubbercompound.
All inks which are formulated for printing on non-porous surfaces contain a resin binder which bonds the dye or
pigment in the ink to the surface of the material being printed. As the ink begins to dry, this binder becomes
“tacky” or “sticky”. While in this stage of the drying process, the tack on the dies will tend to pick up both airborne
dust and any dust or dirt on the surface of the material being printed. When this happens, the dies should be
cleaned or replaced. The easiest method of cleaning the dies requires the appropriate solvent for the ink being
used, a pair of rubber gloves, safety glasses, an apron to protect your clothing is recommended, a toothbrush,
some clean paper towels and a plastic bag to protect your workbench from staining. (Naturally, the toothbrush
will never be suitable for oral hygiene use after this process.)
Aftersome period of use,the accumulation ofcontaminates on the dieswill cause degradationof the printquality;
cleaning the printing dies, excluding excessive wear to the die face, will restore the print quality of the coder.
MAINTENANCE

18
4- Lift the spring block assembly straight up off the
stainless steel posts.
Important Note: The Print Drum Axle is machined with
thread relief so the tip of the set screw will not damage
the threads. To completely remove the Index Ring from
the Axle, the Brass Tip Set Screw must be loosened at
least 2 full turns to prevent damage to the threads.
1- Using a 5/64” hex wrench, loosen the Nylon Tip Set
Screw located in the top rim of the Print Drum and
remove the dust cover.
FIGURE31
3- Using a small screwdriver, remove the two E-Rings
from the stainless steel posts to enable removal of the
spring block assembly.
2- To relieve the spring tension on the index mechanism,
rotate the Print Drum approximately 3/4 turn. The Index
Compression Springs will now be in the fully extended
(relaxed) position.
.04 BRASS TIP
SETSCREW
PRINT DRUM AXLE
RECESSAREA
PRINT DRUM INDEX MECHANISM DISASSEMBLY / ASSEMBLY
PRINT DRUM INDEX MECHANISMMAINTENANCE
FIGURE32
FIGURE33
FIGURE34
FIGURE35

19
PRINT DRUM INDEX MECHANISMMAINTENANCE
5- Using a 1/8" hex wrench, loosen the Brass Tipped Set
Screw located in the side of the Index Ring. This screw
must be turned counterclockwise at least two full
revolutions.
6- Remove the Index Ring from the axle by turing it in a
Counter-Clockwise direction. If the Index Ring does not
turn freely, loosen the set screw an additional turn as
indicated in Step 5 above.
7- The print drum can now be lifted off the axle.
1- Holding onto the Index Assembly Block “A”, pull the Index
Assembly Block “C” off the guide shafts. Remove the Drum
Index Springs
2- Install new Index Springs over the stainless steel guide shafts
and replace Index Block “C”.
3- Reinstall the Index Spring Assembly in the Print Drum with
the large end of the white bushings facing up towards the
open end of the Print Drum.
4- Reinstall the two Snap Rings.
REPLACING PRINT DRUM INDEX SPRINGS
FIGURE39
FIGURE40
FIGURE41
FIGURE42
FIGURE43

20
Note: Before replacing Index Block “B”, ensure that the
Index Ring is properly adjusted.
2- Lift Index Block “B” straight up to remove.
Theheadof theIndexAssembly MountingScrewengages theT-Slot
inIndex Block“B”. Thismountingdesignfacillitates heightadjustment
of the Index Block during reassembly.
REMOVING AND REPLACING INDEX BLOCK “B”
1- To remove Index Block “B” from the Print Drum, roll down
the Drum Cover directly behind the Index Block to expose
the IndexAssembly Mounting Screw. Using a screw driver,
turn the Mounting Screw in a clockwise direction until the
Index Block becomes loose and can be removed.
If the Indexing Assembly Block “B” is removed during disassembly it must be realigned using the
following procedure.
3-Installthe Index Ringbythreading it onto theaxle(turning it ina
Clockwise direction) until it contacts the shoulder of the axle.
PRINT DRUM INDEX MECHANISMMAINTENANCE
FIGURE44
FIGURE45
FIGURE46