Oki ML 691, ML 690, ML 621, ML 620 Installation Instructions

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Push Tractor

Installation Instructions:

ML620, ML621, ML690, ML691

Pull Tractor � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � �1
Tracteur ou le propulseur � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � �3
Mecanismo de tracción de arrastre � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � �5
Tracionador de puxar � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � �7

Use the pull tractor to

efciently feed multi‑part
forms, labels, etc., in a straight
path through the bottom of the
printer.

NOTE: The grooves on the back

side of the Pull Tractor (as
described in the following step
number 2; one on the far left;

one on the far right; Fig. 2)
attach to the same two pins as
the Pull-up Roller Assembly.

Prepare the Printer

1� Turn the printer OFF.
2� Open the access cover (Fig.

1) and center the printhead.

CAUTION! The printhead
may be hot!

Figure 1 Figure 3

PULL-UP

ROLLER

ASSEMBLY

Install the Tractor

1� Remove the Pull‑up Roller

Assembly (Fig. 1). Rotate
the assembly towards the
back of the printer and pull it
up off the left and right side
pins to remove it. Store the
assembly for future use.

2� Install the Pull Tractor. Find

the grooves (Fig. 2) on the
back side of the tractor (the
front side of the tractor has
the sprocket pins and tractor
covers). With the front side
of the tractor facing the
front of the printer, use
your ngers to help guide
the grooves (Fig. 3) onto
the pins on the printer, and
push the tractor down until it
clicks into place.

Figure 2

TRACTOR
GROOVES
(ON BACK

SIDE OF

TRACTOR)

BAIL

ARM

LOCK

LEVER

ACCESS

COVER

PAPER
GUIDE

PULL

TRACTOR

TRACTOR
PINS and
TRACTOR

COVER

(SLIDES

WHEN NOT

LOCKED)

1 / English

Load Paper

bottom

pulltractor-cover-close-A

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1� Make sure the Paper Type

lever (Fig. 4) is in the PULL
position.

2� Place the printer on a

slotted printer stand,
carefully aligning the slot
in the stand with the slot
in the base of the printer.

3� Adjust the Paper Thickness

Lever to suit the paper.

4� Pull open the tractor bail

arm (Fig. 2), place the paper
through the slot in the base
of the printer and bring the
paper through the slot.

5� Lift the lock lever (Fig. 2) of

the left Pin Tractor and slide
the Pin Tractor as required
to adjust the paper position.
Then press the lock lever
back down to lock the Pin
Tractor.

6� Lift the lock lever of the right

pin tractor and slide the
Pin Tractor to the required
position to accommodate

the width of the continuous
forms to be used. Move
the paper guide to midway
between the left and right
Pin Tractors.

7� Raise the bail arm (Fig. 2),

open the left and right Pin
Tractor covers and feed
the continuous forms in
the direction of the arrow,
loading the sprocket holes in
the forms onto the sprocket
pins.

NOTE: Make sure that paper is

fed straight into the printer to
avoid the possibility of skew
printing, irregular line feeding
and paper jams.

8� Make sure that the forms

are properly aligned on the
sprocket pins, then close
the Pin Tractor covers.
Adjust the right Pin Tractor
to accommodate the width
of the continuous forms,
taking care that the forms
are held neither too loosely
nor too tightly between the
Pin Tractors. Press the lock
lever down to lock the right
Pin Tractor in the desired
position. Swing the bail arm
down and push to lock it in
place (Fig. 5).

NOTE: Make sure that the

continuous form is pulled down
to take up slack. Slack will
cause the line spacing to be
inconsistent. Turn the platen to
help remove the slack.

9� Close the access cover.

10� Use the platen knob (Fig. 5)

to adjust or set the TOF.

11� Turn the printer ON.

NOTE: If the TOF position shifts

because of taking up slack,
press the LF/FF key to set the

TOF position. Do not use the

platen knob for this option as
this will cause irregular line
spacing.

Removing the Pull
Tractor

1� Turn the printer OFF.
2� Remove paper from the

printer using the platen knob
(Fig. 5).

3� Open the access cover and

center the printhead.

CAUTION! The printhead
may be hot!

4�

Release the pull tractor by
squeezing the silver lock
tabs at the base of the
tractor while rotating the

tractor to the rear of the

printer. Lift the tractor off.

5� Position the Pull‑up

Assembly (Fig. 1) over
the platen and line up the
grooves on the assembly
with the pins beside the
gray tabs (Fig. 6). Push the
assembly onto the pins and
pull the assembly toward the
front of the printer until it
clicks into place.

Figure 4 Figure 5 Figure 6

GUIDE ON

PRINTER SHOWS

POSITIONS

FOR EACH FEED

METHOD (I.E.,

PAPER TYPE)

SET PAPER

TYPE LEVER

FOR PULL

FEED

2 / English

BAIL
ARM

PLATEN

KNOB

ALIGN PULL-UP

ROLLER GROOVES

WITH PRINTER PINS

Directives d’installation

tractor-unit-pull-09-A

Tracteur ou le propulseur ML620, ML621, ML690,
ML691

Utilisez tracteur ou le

propulseur pour efcacement
alimenter des formulaires à
exemplaires multiples, des
étiquettes, etc. en suivant un
circuit papier en ligne droite
par le fond de l’imprimante.

REMARQUE : Les rainures

à l’arrière du tracteur ou le
propulseur (comme décrit à
l’étape 2 ci-dessous; une à
l’extrême gauche et l’autre
à l’extrême droite; Fig. 2) se

xent sur les mêmes broches
que l’assemblage de rouleau de

traction.

Préparation de
l’imprimante

1. Éteignez l’imprimante.

2. Ouvrez le capot d’accès

(Fig. 1) et centrez la tête
d’impression.

ATTENTION! La tête
d’impression peut être
BRÛLANTE!

Figure 1 Figure 3

L’ASSEMBLAGE

DE ROULEAU DE

TRACTION

Installation du
tracteur

1. Enlevez l’assemblage de

rouleau de traction (Fig. 1).
Faites tourner l’assemblage
vers l’arrière de l’imprimante
et soulevez-le des broches
à gauche et à droite

pour l’enlever. Rangez
l’assemblage pour utilisation
ultérieure.

2. Installez le tracteur. Trouvez

les rainures (Fig. 2) à
l’arrière du tracteur (les
pignons et les couvercles
de pignon sont à l’avant
du tracteur). Avec l’avant
du tracteur orienté vers
l’avant de l’imprimante,
utilisez vos doigts pour vous
aider à guider les rainures
(Fig. 3) sur les broches de
l’imprimante et poussez sur
le tracteur jusqu’à ce qu’il
s’enclenche.

Figure 2

BRAS DU

PRESSE-

PAPIER

RAINURES

DE TRACTEUR

(AU DOS DU

TRACTEUR)

CAPOT

D’ACCÈS

LE GUIDE

PAPIER

LEVIER DE

VERROUILLAGE

TRACTEUR

OU LE

PROPULSEUR

TRACTEUR ET

COUVERCLE
DE TRACTEUR
(COULISSENT

SI PAS

VERROUILLÉS)

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