Brother MFC-8440 Installation instructions

CHAPTER 4 DISASSEMBLY AND RE-ASSEMBLY

4-4

3.3 Paper Tray

(1) Close the front cover and pull out the paper tray.

(2) Remove the paper from the paper tray.

Fig. 4-3

(3) Remove the pad holder and the separation pad spring from the paper tray.

Fig. 4-4

Front cover

Paper tray

Pad holder

Separation pad spring

Paper tray

MFC-8440/8840D/8840DN, DCP-8040/8045D/8045DN

SERVICE MANUAL

4-5

NOTE:

When replacing/re-assembling the pad holder ZL2 ASSY, remove the old grease and apply a

suitable amount of grease referring to the figure below;

Fig. 4-5

(4) Remove the four bind B M4x12 Taptite screws, and then remove the paper tray front

cover.

Fig. 4-6

Paper tray

Paper pick-up roller

Grease: Molykote PG-662

(4 mm dia.ball)

Taptite, bind B M4x12

Taptite, bind B

M4x12

Paper tray front cover

Paper tray

Hook

CHAPTER 4 DISASSEMBLY AND RE-ASSEMBLY

4-6

(5) Remove the two cup B M3x10 Taptite screws, and then remove the paper tray cover.

Fig. 4-7

(6) Remove the pressure roller holder.

Fig. 4-8

Paper tray

Taptite, cup

B M3x10

Paper tray cover

Flat screwdriver

Pressure roller holder

Paper tray

Taptite, cup B M3x10

MFC-8440/8840D/8840DN, DCP-8040/8045D/8045DN

SERVICE MANUAL

4-7

(7) Remove the pressure roller collar.

(8) Remove the pressure roller shaft.

Fig. 4-9

(9) Remove the scratch spongy holder ASSY from the pressure roller holder.

(10) Remove the two scratch spongy springs.

(11) Remove the scratch spongy from the scratch spongy holder ASSY.

Fig. 4-10

Pressure roller shaft

Pressure roller holder ASSY

Scratch spongy

Scratch spongy holder ASSY

Pressure roller holder

Scratch spongy springs

Pressure roller collar

CHAPTER 4 DISASSEMBLY AND RE-ASSEMBLY

4-8

(12) Remove the two cup M2.6x5 Taptite screws.

(13) Release the lock lever, and then unhook the catches of the two side guide racks.

Fig. 4-11

(14) Remove the side guides right and left from the paper tray.

Fig. 4-12

Taptite, cup M2.6x5

Side guide rack

Lock lever

Paper tray

Catches

Paper tray

Side guide L

Side guide R

Side guide L

Side guide rack

MFC-8440/8840D/8840DN, DCP-8040/8045D/8045DN

SERVICE MANUAL

4-9

(15) Unhook the two catches (A) of the pressure plate while pulling the plastic frame outwards,

then unhook the other two catches (B) of the plate while pulling the plastic frame outwards

to remove the pressure plate ASSY.

Fig. 4-13

(16) Unhook the pressure plate spring from the plastic hook to remove the two pressure plate

springs.

Fig. 4-14

Pressure plate ASSY

Plastic frame

Catches (A)

Paper tray

Pressure plate spring

Catch (B)

Hook

CHAPTER 4 DISASSEMBLY AND RE-ASSEMBLY

4-10

NOTE:

When re-assembling the pressure plate ASSY, ensure that the paper indicator arm is under the

pressure plate.

CAUTION:

When unhooking the catches to remove the pressure plate, do not bend the pressure plate,

gently ease the plastic cover. If the pressure plate is deformed, paper feeding problems may

occur.

(17) Remove the herical extension spring.

(18) Remove the lock lever.

Fig. 4-15

NOTE:

When re-assembling the lock lever, insert it upwards from underneath the cassette and rotate

it until the two catches lock into place.

Herical extension spring

Lock lever

Paper tray

Lock lever

MFC-8440/8840D/8840DN, DCP-8040/8045D/8045DN

SERVICE MANUAL

4-11

(19) Remove the cup B M3x8 Taptite screw, and then remove the side guide gear and the

friction spring.

(20) Remove the two side guide racks.

Fig. 4-16

(21) Remove the paper indicator.

Fig. 4-17

Side guide rack

Paper tray

Paper indicator

Taptite, cup B M3x8

Side guide gear

Friction spring

CHAPTER 4 DISASSEMBLY AND RE-ASSEMBLY

4-12

NOTE:

• When re-assembling the side guide racks, they should both be aligned so that the wide end

of the racks are in line with the inside edge of the paper guide release slots in the tray

before refitting the spring and gear.

• When replacing/re-assembling the paper cassette, remove the old grease and apply a

suitable amount of grease onto both sides of the paper tray referring to the figure below;

Fig. 4-18

(22) Remove the pan B M3x8 Taptite screw, and then remove the tray lock lever.

(23) Unhook the four hooks to remove the paper tray rear from the paper tray.

Fig. 4-19

Taptite, pan B M3x8

Tray lock lever

Paper tray

Hook

Paper tray rear

Paper tray

Grease: Molykote PG-662

(2 mm dia. ball)

Grease: Molykote PG-662

(2 mm dia. ball)

Hooks

Hook

MFC-8440/8840D/8840DN, DCP-8040/8045D/8045DN

SERVICE MANUAL

4-13

(24) Remove the paper rear guide.

Fig. 4-20

Paper tray

Paper rear guide

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