Oki ML620 Installation Instructions Manual

A push tractor is standard 

equipment and comes installed 

in the rear of the printer. Install 

a second push tractor on the 

front of the printer to easily 

switch between the two print 

paths.

Prepare the Printer

1. 

Remove any paper from the 

print path.

2. 

Turn the printer OFF.

3. 

Disconnect the computer 

cable and power cable.

Front Install

front̲tractor-cover-close-20-70

1. 

Pull down the front panel 

(Fig. 1).

2. 

Move the tractor’s paper 

guide (Fig. 2) to midway 

between the left and right 

tractor pins. 

Installation Instructions: 

ML620, ML621, ML690, ML691

3. 

Squeeze the finger guides 

(Fig. 2) and insert the tractor 

into the front feed. When it 

is seated, push down to snap 

the guides in place.

Load Paper (Front)

1. 

Connect the computer cable 

and power cable and turn 

the printer ON.

2. 

Make sure the Paper Type 

lever is in the FRONT feed 

position (Fig. 1). 

3. 

Open the access cover and 

set the Paper Thickness lever 

(Fig. 1) to suit the paper. 

Close the cover.

4. 

Pull up on the lock levers 

(Fig. 2) to release them and 

allow the tractor covers to 

slide back and forth. 

NOTE:

 You will find reference 

marks on the back side of the 

front panel (far left side) for 

the most common paper sizes 

(Fig. 1).

5. 

Move the left tractor to the 

position that matches your 

paper size and push down on 

the lever to lock it in place, 

then move the right tractor 

to fit the width of the paper.

6. 

Open the tractor covers 

and place continuous forms 

paper on the first two pins of 

either tractor, then close the 

left tractor cover. 

Important!

 To keep the paper 

from skewing or jamming, be 

sure that both sides of the 

paper have the same number 

of paper holes engaged on the 

sprocket pins.

7. 

Adjust the position of the 

right tractor to center the 

holes in the paper on the 

pins. Then, close the tractor 

cover and push down the 

lock lever. Do not stretch the 

paper.

NOTE:

 If the paper is too loose 

or too tight it can cause jams.

8. 

Press the 

LOAD/EJECT

 key 

to advance the paper.

NOTE:

 The factory default 

setting for the Top of Form 

(where the printing should 

begin) is 11/12-inch (23.3 

mm) down from the top of the 

page. To change the setting, 

see “Top of Form (TOF)” in the 

printer manual.

For more information see your 

printer manual.

Push Tractor  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1

Chargeur à traction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3

Mecanismo de tracción de empuje  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5

Tracionador de empurrar. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7

1 / English

PAPER 

GUIDE

FINGER 

GUIDES

LOCK 

LEVER

PAPER 

THICKNESS 

LEVER 

(BLUE)

Figure 1

Figure 2

SET PAPER TYPE 

LEVER FOR 

FRONT FEED

(REFERENCE 

MARKS ARE ON 

BACK SIDE OF 

FRONT PANEL)

FRONT 

PANEL

GUIDE ON PRINTER SHOWS 

POSITIONS FOR EACH FEED 

METHOD (I.E., PAPER TYPE)

TRACTOR PINS and 

TRACTOR COVER 

(SLIDES 

WHEN NOT LOCKED)

RPS

REAR

FRONT

PULL

Push Tractor