9785 - 3M Electronic Specialty

Scotch-Weld™Hot Melt Applicator EC

Aplicador EC por Fusión en Caliente

Scotch-Weld™

Applicateur d’adhésif thermo-fusible EC

de Scotch-Weld™

Adhesive Applicator

Aplicador de adhesivo

Applicateur d’adhésif

Owner’s Manual

Manual del propietario

Manuel de l’utilisateur

Utilice el aplicador con los Adhesivos por Fusión en Caliente Scotch-Weld™de

3M™ en cartuchos Quadrack™.

Use with 3M™ Scotch-Weld™ Hot Melt Adhesives in Quadrack™ cartridge form.

Utilisez avec l’adhésif thermo-fusible 3M™ Scotch-Weld™ sous forme de cartouche

Quadrack™.

Important Safety Instructions..........................................................................1

Grounding Instructions ...................................................................................2

Unpacking .......................................................................................................3

Features ...........................................................................................................3

Temperature Module Installation....................................................................4

Applicator Startup...........................................................................................5

Adjusting Trigger Stroke and Shot Size .........................................................8

Changing to Another 3M Adhesive

Requiring a Different Temperature Module .................................................10

Shutdown.......................................................................................................12

Preventive Maintenance ................................................................................13

Operator Productivity and Comfort ..............................................................14

Troubleshooting ............................................................................................15

Condition 1: Applicator will not heat .................................................16

Condition 2: Dripping nozzle .............................................................22

Condition 3: Low or no adhesive flow ...............................................24

Illustrated Parts Breakdown ..........................................................................26

3M™ Scotch-Weld™ Hot Melt Applicator EC Parts Kits ...........................27

Accessories....................................................................................................28

Temperature Module Selections for 3M™ Scotch-Weld™

Hot Melt Quadrack™ Adhesives ..................................................................29

Warranty and Repair .....................................................................................31

3M Sales Branches…......................................................................Back cover

Table of Contents

Important Safety Instructions

• Save these instructions

• Read all instructions before using this

product

3M™ Scotch-Weld™ Hot Melt

Applicator EC Operation and Servicing

WARNING

To reduce the risk of electrical shock or injury while

operating or servicing the 3M Scotch-Weld Hot Melt

Applicator EC, observe the following safety rules:

1. Operate and service the applicator only as

described in this manual.

2. Connect the applicator only to a properly

grounded outlet.

3. Do not unplug the applicator by pulling on the

cord. Grasp the plug, not the cord, to unplug.

4. Do not handle the plug or applicator with wet

hands.

5. Do not use the applicator outdoors or on wet

surfaces.

6. Do not use the applicator if the cord or plug is

damaged.

7. Do not use the applicator if it is not working

properly or has been damaged, submerged in water

or left outdoors.

WARNING

Use only 3-prong grounded plug and properly

grounded outlet. Failure to use properly grounded

plug and outlet may cause electrical shock. If you

are not sure of proper connections, get help from a

qualified electrician or service person.

WARNING

Disconnect electrical power and make sure applicator

has cooled to room temperature before servicing.

Failure to disconnect electrical power or failure to

allow applicator to cool before servicing may cause

electrical shock or burns. Read owner’s manual

before servicing.

WARNING

Do not use an unapproved extension cord with the

applicator. Use of an unapproved extension cord may

cause electrical shock. Use an extension cord which

complies with NEC requirements and state and local

codes and other requirements.

WARNING

Use only 3M-specified replacement parts. Use of

other replacement parts may cause hazardous

conditions or damage the applicator.

Caution

Allow applicator to cool to room temperature before

servicing. Failure to do so may cause burns.

Caution

Avoid contact with hot adhesive and applicator tip.

May cause burns. Wear safety glasses when using.

Caution

Use only the proper temperature module for the 3M™

Quadrack™ adhesive used. Failure to do so may

cause burns or damage applicator. Refer to Table 1

for proper module selections for 3M Quadrack

adhesives.

Caution

Do not pull adhesive stick from the rear of the

applicator while in operation. Removing the adhesive

from the rear may cause molten adhesive to flow out

the rear of the applicator which may cause burns

and damage the applicator.

3M™ Scotch-Weld™ Hot Melt

Adhesive

Note: For health and safety information, see product

label and Material Safety Data Sheet for 3M

Scotch-Weld Hot Melt Adhesive before using.

WARNING

Use only with 3M™ Scotch-Weld™ Hot Melt

Quadrack™ adhesive sticks. Use with any other

materials may cause hazardous conditions.

WARNING

Do not clean or remove the 3M Scotch-Weld Hot

Melt Adhesive with solvent. May cause fire. For

additional health and safety information, see the

product label and Material Safety Data Sheet for the

3M Scotch-Weld Hot Melt Adhesive used.

Grounding Instructions

The 3M ™ Scotch-Weld ™ Hot Melt Applicator EC must be grounded.

If the applicator malfunctions, grounding provides a path of least

resistance for electric current to help reduce the risk of electrical shock.

This applicator is equipped with a cord having an equipment-grounding

conductor and grounding plug. The plug must be used with an

appropriate outlet that is properly installed and grounded in accordance

with all state and local codes and requirements.

The 3M Scotch-Weld Hot Melt Applicator EC is intended for use on a

nominal 120-volt circuit with a grounding plug as shown in the figure

above. Make sure the applicator is connected to an outlet with the same

configuration as the plug. Do not use an adaptor.

WARNING

Do not modify the plug

provided with the applicator or

use with an adaptor or

ungrounded outlet. Improper

grounding connection of the

applicator may cause electric

shock. If the plug will not fit

the outlet, have a qualified

electrician or service person

install the proper outlet.

Grounging

Grounged

Outlet

UNPACKING

Remove the applicator and temperature modules (attached to the applicator)

from their shipping container and inspect for obvious damage. If damaged,

do not use and immediately contact your 3M sales representative or your

authorized 3M distributor.

FEATURES

• Industrial-grade, all-electric applicator, 120 VAC 40/60 Hz, 350 watts.

•Designed for 3M™ Scotch-Weld™ Hot Melt Quadrack™ Adhesive Sticks.

• Delivers up to 5.5 pounds of 3M adhesive per hour on demand.

• Innovative transport mechanism minimizes dripping.

• Applicator is supplied with five removable temperature modules. Refer to Table 1 in the Temperature

Module Installation section for proper module selection for 3M Quadrack adhesive used.

• Palm trigger helps improve operator comfort in high demand applications.

•Stroke adjuster enables precise deposit of adhesive.

RoHS compliant means that the product or part does not contain any of the substances in excess of

the maximum concentration values in EU Directive 2002/95/EC, as amended by Commission

Decision 2005/618/EC, unless the substance is in an application that is exempt under RoHS. Unless

otherwise stated by 3M in writing, this information represents 3M’s knowledge and belief based on

information provided by third party suppliers to 3M.

Temperature Module Installation

Caution

Use only the proper temperature

module for the 3M™ Quadrack™

adhesive used. Failure to do so

may cause burns or damage

applicator. Refer to Table 1 for

proper module selection for 3M

Quadrack adhesive used.

Important:

The 3M™ Scotch-Weld™ Hot Melt Applicator EC is designed to operate

with the proper combination of 3M™ Scotch-Weld™ Hot Melt Adhesives

and temperature modules.

1. Refer to Table 1 on this page or the chart on pages 29-30

(Temperature Module Selections section) for selection of the proper

temperature module to be used with your 3M Quadrack adhesive.

2. Install the proper temperature module by inserting it into the lower

portion of the handle and tighten the fastener until snug

(see Figure A).

Temperature Module Selections for 3M™

Scotch-Weld™ Hot Melt Quadrack™ Adhesives

Module 1 Module 2 * Module 3 Module 4 Module 5

3762 LMQ 3762 LMQ 3762 Q 3738 Q 3731 Q

3776 LMQ 3776 LMQ 3747 Q 3779 Q

3792 LMQ 3792 LMQ 3748 Q 3789 Q

3748 V-O Q

3764 Q

3792 Q

* Tests indicate that use of LM Quadrack adhesives with Module 2

improves the flow rates without damaging most heat sensitive

substrates. For additional information about these 3M adhesives, see

pp. 29-30 of this manual.

Table 1

Figure A

Applicator Startup

Caution

Use only the proper temperature

module for the 3M™ Quadrack™

adhesive used. Failure to do so

may cause burns or damage

applicator. Refer to Table 1 in the

Temperature Module Installation

section for proper module selection

for 3M Quadrack adhesive used.

Caution

Avoid contact with hot adhesive

and the applicator tip. May cause

burns. Wear safety glasses when

using.

Important:

Before proceeding, make sure the proper temperature module has been

installed. See previous section on Temperature Module Installation.

1. Plug the applicator into a grounded 120 VAC receptacle.

2. Push the on/off switch to the “on” position, indicated by the visible

red portion of the switch (see Figure B).

3. Wait 5 to 10 minutes for heat-up.

Note: Allow at least 15 minutes for heat-up at its next use if the

applicator did not have adhesive extruded at shut-down. Refer

to shut-down procedure on page 12.

Important:

Thermal expansion can cause a small amount of adhesive to drip from

the tip during heat-up. With the proper temperature module selection,

the applicator should not drip after heat-up.

4. Inspect the nozzle tip. Use a Scotch-Brite®pad or equivalent to

remove accumulated adhesive or foreign matter from the tip.

Figure B

Applicator Startup (continued)

Caution

Do not pull adhesive sticks from

the rear of the applicator while in

operation. Removing adhesive

from the rear may cause molten

adhesive flow out the rear of the

applicator which may cause burns

and damage the applicator.

5. Insert 3M Scotch-Weld Hot Melt Quadrack adhesive stick through

the stroke adjuster and transport mechanism (see Figure C).

6. Align flat surfaces of stick as show in Figure D.

WARNING

Use only with 3M™ Scotch-

Weld™ Hot Melt Quadrack™

Adhesive Cartridges. Use with any

other materials may cause

hazardous conditions.

Figure D

Figure C

Applicator Startup (continued)

7. Extrude adhesive from the 3M™ Scotch-Weld™ Hot Melt Applicator EC

by applying firm, even pressure to the trigger (see Figure E).

Important:

Do not use excessive force while extruding adhesive through the applicator.

Slow, continuous trigger actuation is required. Excessive force can damage

the applicator.

Figure E

Adjusting Trigger Stroke and Shot Size

Caution

Avoid contact with hot adhesive

and the applicator tip. May cause

burns. Wear safety glasses when

using.

Caution

Do not pull adhesive stick from the

rear of the applicator while in

operations. Removing adhesive

from the rear may cause molten

adhesive to flow out the rear of the

applicator which may cause burns

and damage the applicator.

1. Extrude the remaining adhesive from the entry track.

2. Using the trigger, push the transport mechanism full forward (see

Figure F).

3. Carefully twist the stroke adjuster off the entry track (see

Figure G).

Figure F

Figure G

Adjusting Trigger Stroke and Shot Size (continued)

Caution

Avoid contact with hot adhesive

and the applicator tip. May cause

burns. Wear safety glasses when

using.

4. Snap the stroke adjuster into a new position on the entry track

(see Figure H).

• For a shorter stroke or smaller shot size, move the stroke adjuster

forward (see Figure I).

• For a longer stroke or larger shot size, move the stroke adjuster

toward the rear.

5. When the trigger stroke and shot size are established, ensure that the

stroke adjuster is correctly seated on the entry track (see Figure J).

6. Ensure that the white ring on the inside of the stroke adjuster moves

freely. If not, remove and reinstall the stroke adjuster (see Figure J).

Figure H

Figure I

Figure J

Changing To Another 3M™ Adhesive Requiring A

Different Temperature Module

Caution

Use only the proper temperature

module for the 3M Quadrack

adhesive used. Failure to do so

may cause burns or damage

applicator. Refer to Table 1 in the

Temperature Module Installation

section for proper module selection

for 3M Quadrack adhesive used.

Make sure the proper temperature module is in the applicator for the

adhesive then in the entry track. Refer to Table 1 on page 4 or the chart

on pages 29-30 (Temperature Module Selections section) for selection of

the proper temperature module to be used with your

3M™ Quadrack™ adhesive.

1. Extrude the remaining adhesive from the entry track.

2. Turn the applicator off by pressing the rocker switch at the rear of

the handle (see Figure K). The red visor on the rocker switch

disappears, indicating the applicator is off.

3. Unplug the applicator and allow it to cool to room temperature.

4. Remove the temperature module by simultaneously unscrewing the

fastener and lifting the module out (see Figure L). Save the module

for possible reuse.

Note: Do not unscrew the fastener more than 8 turns before lifting

the module out.

Caution

Allow applicator to cool to room

temperature before servicing.

Failure to do so may cause burns.

ltAp

Scot

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Figure K

Figure L

Changing To Another 3M™ Adhesive Requiring A

Different Temperature Module (continued)

Install the proper temperature module for the adhesive that has been

selected by inserting and tightening the fastener until snug (see Figure

L). Refer to Table 1 on page 4 or the chart on pages 29-30

(Temperature Module Selections section) for selection of the proper

temperature module to be used with your 3M™ Quadrack™ adhesive.

5. Reconnect the power cord to the 120 VAC grounded receptacle.

Push the on/off switch to the “on” position, indicated by the visible

red visor of the switch (see Figure K).

6. Allow the applicator to heat up for 5 to 10 minutes with the new

temperature module. Extrude all old adhesive left in the applicator

by inserting the new adhesive and advancing through the applicator

until it is ready to be reloaded with another stick.

Important:

Do not use excessive force while extruding adhesive after changing the

temperature modules. Slow, continuous trigger actuation is required.

Excessive force can damage the applicator and cause molten adhesive

flow out the rear.

7. The applicator is now ready to be used with the new adhesive.

Caution

Use only the proper temperature

module for the 3M Quadrack

adhesive used. Failure to do so

may cause burns or damage

applicator. Refer to Table 1 in the

Temperature Module Installation

section for proper module selection

for 3M Quadrack adhesive used.

WARNING

Use only with 3M™ Scotch-Weld™

Hot Melt Quadrack™ Adhesive

Sticks. Use with any other

materials may cause hazardous

conditions.

Caution

Avoid contact with hot adhesive

and the applicator tip. May cause

burns. Wear safety glasses when

using.

Shutdown

1. Turn the applicator off by pressing the rocker switch at the rear

of the handle. The red visor on the rocker switch disappears,

indicating the applicator is off (see Figure M).

2. Immediately, extrude approximately half of a Quadrack

adhesive stick through the applicator.

Important:

For long-term shutdown, disconnect the power cord from the power

source.

WARNING

Use only with 3M™ Scotch-Weld™

Hot Melt Quadrack™ Adhesive

Sticks. Use with any other

materials may cause hazardous

conditions.

Caution

Avoid contact with hot adhesive

and the applicator tip. May cause

burns. Wear safety glasses when

using.

Caution

Do not pull adhesive stick from the

rear of the applicator while in

operation. Removing adhesive

from the rear may cause molten

adhesive to flow out the rear of the

applicator which may cause burns

or damage the applicator.

Figure M

Preventive Maintenance

1. Inspect the nozzle tip every day before startup. Use a Scotch-Brite®

pad or equivalent to remove accumulated adhesive or foreign matter

from the tip

2. Inspect the adhesive entry track and transport mechanism daily to

ensure it is clear of foreign matter and slides freely.

3. Inspect the applicator once a week. Refer to the Troubleshooting

and Repair Procedures of this manual if necessary.

WARNING

Do not clean or remove the 3M™

Scotch-Weld™ Hot Melt Adhesive

with solvent. May cause fire. For

additional health and safety

information see the product label

and Material Safety Data Sheet for

Scotch-Weld Hot Melt Adhesive

used.

Caution

Avoid contact with hot adhesive

and the applicator tip. May cause

burns. Wear safety glasses when

using.

Caution

Do not pull adhesive stick from the

rear of the applicator while in

operation. Removing adhesive

from the rear may cause molten

adhesive to flow out the rear of the

applicator which may cause burns

or damage the applicator.

Operator Productivity and Comfort

AVOID:

• Raised elbow

• Bent Wrist

• Reaching

• Bending over

These positions can result in irritation of the nerves, muscles, tendons, and cartilage of the shoulder, elbow, wrist,

hand and back.

Adjust your workstation so you can:

• Stand or sit erect

• Keep your elbows close to your sides

• Hold the applicator with a straight wrist

Troubleshooting

This part of the owner’s manual is divided into three sections to assist in

evaluating possible operating difficulties with your 3M™ Scotch-Weld™

Hot Melt Applicator EC.

If the applicator will not heat, refer to:

Condition 1:

Applicator will not heat

Page 16

If the applicator is heating, refer to:

Condition 2:

Dripping nozzle

Page 22

Condition 3:

No or low adhesive flow

Page 24

An applicator diagram and replacement parts list can be found on pages

26-27. Should your applicator require repair, replacement parts can be

ordered from your local authorized 3M Scotch-Weld Hot Melt Adhesive

distributor. If, after following these procedures, a problem still exists,

contact your local Sales Representative. For telephone numbers of the

nearest 3M location refer to the back cover of this manual.

Important:

Service on this applicator should only be performed by a qualified

electrician or service person.

WARNING

Use only 3M-specified replacement

parts. Use of other replacements

parts may cause hazardous

conditions or damage the

applicator.

Troubleshooting (continued)

Condition 1:

Applicator

will not heat

Important:

Troubleshooting steps should be conducted only by a qualified

electrician or service person.

1. Turn the applicator on by pushing the on/off switch to the “on”

position, indicated by the visible red visor of the switch

(see Figure N). If no heat, proceed to the next step.

2. Check to make sure that the proper temperature module is fully

engaged by inserting and tightening the fastener until snug (see

Figure O). Refer to Table 1, page 4, for the proper module. If no

heat, proceed to the next step.

Figure N

Figure O

Caution

Use only the proper temperature

module for the 3M™ Quadrack™

adhesive used. Failure to do so

may cause burns or damage

applicator. Refer to Table 1 in the

Temperature Module Installation

section for proper module selection

for 3M Quadrack adhesive used.

Troubleshooting (continued)

Condition 1:

Applicator

will not heat

3. Check to make sure that power cord is plugged in and that the

electrical outlet has power. If there is no power, contact an

electrician. If outlet has correct power, proceed to the next step.

4. Disconnect the power cord from the electrical outlet, then remove

the temperature module by unscrewing the fastener and lifting out

(see Figure O). Inspect the module for damage to the pins.

If no damage is found, check the resistance between the pins using

an ohmmeter. If the measured value does not agree with that listed

in Table 2, then the temperature module is defective. Replace it by

ordering the appropriate Temperature Module Kit. See Parts Kit list

on page 27 on this manual.

If the measured value agrees with that listed in Table 2, place

temperature module aside for re-use and proceed to next step.

Important:

Remove the power cord from the electrical outlet before conducting any

further evaluations or repairs.

Handle Disassembly

5. Remove the remaining adhesive from the entry track by using a

utility knife to cut off the adhesive stick just before it enters the

white sleeve assembly, and gently remove it.

Refer to Figure P for steps 6 through 8.

6. Remove the stroke adjuster by firmly grasping and twisting upward.

7. Remove the end clip by gently prying off one end of the clip.

8. Slide the transport mechanism off the entry track.

Figure P

Allowable Resistance

Module 1 21-26 K ohms

Module 2 12-16 K ohms

Module 3 3-5 K ohms

Module 4 1-1.5 K ohms

Module 5 0-10 ohms

WARNING

Disconnect the electrical power and

make sure the applicator has cooled

to room temperature before

servicing. Failure to disconnect the

electrical power or failure to allow

applicator to cool before servicing

may cause electrical shock or

burns.

Table 2

Caution

Do not pull adhesive stick from the

rear of the applicator while in

operation. Removing adhesive

from the rear may cause molten

adhesive to flow out the rear of the

applicator which may cause burns

or damage the applicator.

Troubleshooting (continued)

Condition 1:

Applicator

will not heat

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Scot

™

9. To remove the trigger (see Figure Q):

a. Use a small screwdriver to remove the E-ring from the pin at the

base of the trigger.

b. Remove the trigger pin.

c. Remove the trigger and spring.

10. If the temperature module is installed, remove it by unscrewing the

fastener and lifting out (see Figure O). Set aside until reinstalled.

11. Remove the six screws and hanger clip from the applicator handles.

Remove the left-handle (see Figure R).

Figure Q

Figure R

Troubleshooting (continued)

Condition 1:

Applicator

will not heat

12. Inspect all terminal block connections for loose or disconnected wires

by making certain the screws in each terminal block are securing the

wires. If any connections are loose or have pulled out of the terminal

blocks, reconnect and retighten the connections (see Figures S and T).

After reconnections have been made, reassemble the applicator

making sure wiring is properly located and will not be pinched when

handles are closed (see Figures P, Q and R). Reinstall the previously

removed temperature module (see Figure O).

If all terminal block connections were initially found to be tight,

proceed to the next step.

Important:

Power switch MUST be in “on” position (red visor visible) for step 13.

13. Check electrical continuity of heater/TCO/switch assembly. Using an

ohmmeter, measure across the terminals numbered 3 and 4 on the top

terminal block labeled TB2. These are the terminal block positions

for the black wire from the power switch and the white wire from the

heater, respectively (see Figure S).

Value measured should be between 40-50 ohms. If measured value is

not in this range, replace the heater/TCO/switch assembly by ordering

3M™ Heater Kit #62-9680-9731-1.

If measured value is within the specified range, proceed to the next

step.

WARNING

Disconnect the electrical power and

make sure the applicator has cooled

to room temperature before

servicing. Failure to disconnect

electrical power or failure to allow

the applicator to cool before

servicing may cause electrical

shock or burns.

TB2

1 2 3 4

Figure S

Troubleshooting (continued)

Condition 1:

Applicator

will not heat

Important:

Applicator must be cooled to room temperature for step 14.

14. Check continuity of the thermistor. First, disconnect the thermistor

lead from terminal number 1 of the upper terminal block (TB2)

(see Figure S). Using an ohmmeter, measure between the

disconnected thermistor lead and terminal number 2 of terminal

block TB2 (see Figure S).

Important:

Thermistor lead must be disconnected for this test.

Measured value between the disconnected thermistor lead and

terminal number 2 should be between .65 and 1.25 Mega-ohms.

If measured value is not within this range, replace the defective

thermistor assembly by ordering 3M™ Thermistor Kit

#62-9680-9733-7.

If measured value is within the acceptable range, reconnect the

previously disconnected thermistor lead to terminal number 1 of

terminal block TB2 (see Figure S) and proceed to the next step.

15. Check the power cord for obvious wire damage. If damage is

observed, replace the power cord by ordering 3M™ Power Cord Kit

#62-9680-9920-0.

If no damage is observed, check the electrical continuity of the

power cord wires (steps 15A and 15b).

a. Using an ohmmeter, check for continuity between terminal

number 1 (black wire from cord) on the lower terminal block

TB1 and the AC line terminal on the applicator plug

(see Figures T and U).

Black wire

White wire

Figure T

Troubleshooting (continued)

Condition 1:

Applicator

will not heat

b. Using the ohmmeter, check for continuity between terminal

number 2 (white wire from cord) on the lower terminal block

TB1 and the AC neutral terminal on the applicator plug

(see Figures T and U).

If the measurements in a) or b) above indicate electrical

discontinuity in the cord, the cord is defective. Replace the

power cord by ordering 3M™ Power Cord Kit

#62-9680-9920-0.

If the measurements in a) and b) above verify electrical

continuity, then the power cord is functioning properly.

16. The cause of the heating problem has now been isolated to be the

temperature controlling circuit. Replace the temperature

controlling circuit by ordering 3M™ Handle/Controller Kit

#62-9680-9732-9.

AC Line Terminal

AC Neutral Terminal

Figure U

Troubleshooting (continued)

Condition 2:

Dripping nozzle

Caution

Avoid contact with hot adhesive

and the applicator tip. May cause

burns. Wear safety glasses when

using.

WARNING

Do not pull adhesive stick from the

rear of the applicator while in

operation. Removing adhesive

from the rear may cause molten

adhesive to flow out of the rear of

the applicator which may cause

burns or damage the applicator.

1. Plug in the power cord of the applicator and turn it on. Follow

Applicator Startup Procedure on page 5 of Owner’s Manual.

Important:

Thermal expansion can cause a small amount of adhesive to drip from the

tip during heat-up. This is normal. If the nozzle continues to drip after a

warmup period of more than 10 minutes, then proceed to the next step.

2. Check to make sure that the proper temperature module is inserted into

the applicator for your adhesive. Refer to Table 1 on page 4 or the

chart on pages 29-30 (Temperature Module Selections section) for

selection of the proper temperature module to be used with your 3M™

Quadrack™ adhesive. If the applicator continues to drip, proceed to

the next step.

3. Make sure that the adhesive is clean and not contaminated, and

proceed to the next step.

Backmelt Procedure:

4. If the adhesive stick is very difficult to extrude, check for backmelt:

a. Slowly push the adhesive stick into the applicator so stick is flush

with the white sleeve.

b. Remove stroke adjuster by firmly grasping and twisting upward

(see Figure P).

c. Remove the end clip by gently prying off one end of the clip

(see Figure P).

d. Remove the transport mechanism by sliding it off the entry track

(see Figure P).

e. Turn the applicator off by unplugging the power cord from the

outlet and pressing the rocker switch off. The red visor on the

rocker switch disappears, indicating the applicator is off

(see Figure N).

Troubleshooting (continued)

Condition 2:

Dripping nozzle

f. Immediately (before the applicator cools), use a blunt object to

gently push the adhesive stick approximately one inch into the

applicator so the white sleeve is empty (see Figure V). Allow

the applicator to cool to room temperature before proceeding to

next step.

g. With the tip pointed down and away from body, look inside the

white sleeve.

h. If there is a thin skin of adhesive on the inside of the white

sleeve, the applicator is backmelted. With the applicator off and

at room temperature, use a small knife or screwdriver to

carefully loosen the edge of this skin. This creates a ridge for

the next adhesive stick to catch.

Important:

Be careful not to damage the white sleeve with knife or screwdriver.

i. Replace the transport mechanism, stroke adjuster, and end clip

(see Figure P). Reconnect the power cord to electrical outlet

and turn on the applicator by pressing the rocker switch to the

on position. Allow the applicator to heat up for ten minutes.

Extrude an adhesive stick to clear the sleeve. Extrude a second

stick to be sure the sleeve is clear. If dripping still continues,

proceed to next step.

Important:

To avoid backmelt problems, keep the tip clean, do not use excessive

force to extrude the adhesive, and allow adequate heat-up time

(especially when using extension tips or small orifice tips).

5. Valve assembly is defective. Replace by ordering 3M™ Valve

Assembly Kit #62-9234-9930-5.

Caution

Allow applicator to cool to room

temperature before servicing.

Failure to do so may cause burns.

Figure V

Troubleshooting (continued)

Condition 3:

Low or no

adhesive flow

Caution

Use only the proper temperature

module for the 3M™ Quadrack™

adhesive used. Failure to do so

may cause burns or damage

applicator. Refer to Table 1 in the

Temperature Module Installation

section for proper module selection

for 3M Quadrack adhesive used.

WARNING

Use only with 3M™

Scotch-Weld™Hot Melt

Quadrack™ Adhesive sticks. Use

with any other materials may cause

hazardous conditions.

Caution

Avoid contact with hot adhesive

and applicator tip. May cause

burns. Wear safety glasses when

using.

1. Check to make sure that the proper temperature module is inserted

and fastened into the applicator for your adhesive. See the

Temperature Module Installation procedure on page 4 of this manual

for proper selection and installation of the temperature module. If the

flow problem still exists with the proper temperature module

installed, proceed to next step.

2. If adhesive is not properly extruded during shut-down (see shutdown

procedure on page 12), the applicator requires 15 minutes of heat-up

time before adhesive will flow properly. If the flow problem still

exists after the 15 minute heat-up, proceed to the next step.

3. When using high viscosity 3M adhesive (3779, 3789, 3747 adhesive),

use a .125” fluted tip (3M #62-9940-6920-1) or a high viscosity valve

(3M #62-9729-9930-4). If a flow problem still exists with the proper

valve and tip being used, proceed to the next step.

4. If the applicator is on for a long period of time without dispensing

adhesive (for example 2-3 hours), charring may occur at the nozzle

tip. Charring blocks adhesive flow and may cause adhesive backmelt.

Remove charred adhesive by pushing a paper clip into the tip to clear

the opening. If the flow problem still exists, proceed to the next step.

Important

To avoid this problem, remember to follow the shutdown procedure on

the page 12 and to extrude at least one adhesive stick every three hours

while the applicator is on.

Troubleshooting (continued)

Condition 3:

Low or no

adhesive flow

5. If the transport mechanism does not move freely on the track or if

the arms of the mechanism do not open and close freely, clean the

transport mechanism (steps 5a-5d).

a. Extrude the remaining adhesive from the entry track.

b. Disconnect the power cord from the outlet.

c. Allow the applicator to cool to room temperature.

d. Use 3M™ Citrus Base Cleaner or equivalent to remove any dirt

that restricts free movement of the transport mechanism. See

Figure P to remove or reinstall transport mechanism if

necessary.

If the transport mechanism is damaged, replace it with 3M™ Transport

Mechanism Kit #62-9787-9930-2. If the flow problem still exists,

proceed to the next step.

6. The adhesive applicator may be backmelted. See Backmelt

procedure on page 22 of this manual. If the flow problem still

exists after cleaning the backmelt, proceed to the next step.

7. There may be gelled adhesive in the heat-block or valve. Replace

the heat block, valve and nozzle with the 3M™ Heat Block Kit

#62-9680-9730-3.

Caution

Allow applicator to cool to room

temperature before servicing.

Failure to do so may cause burns.

WARNING

Do not clean or remove the 3M™

Scotch-Weld™ Hot Melt Adhesive

with solvent. May cause fire. For

additional health and safety

information, see the product label

and Material Safety Data Sheet for

Scotch-Weld Hot Melt Adhesive

used.

Illustrated Part Breakdown

3M™ Scotch-Weld™ Hot Melt Applicator

EC Parts Kits

Each Parts Kit is shipped with illustrated instructions

3M Stock Number Description Contents

62-9680-9733-7 Thermistor Kit Trigger Pin E-Ring

Thermistor Assy Heat Block Inserts (1 set)

Handle Screws (6) Spring

End Clip

62-9680-9730-3 Heat Block Kit Heat Block Assy Thermistor Assy

Valve Assy Heater Clip

Trigger Pin Ground Screw

Nozzle E-Ring

Insulation Spring

Handle Screws (6) Heat Block Inserts (1 set)

End Clip

62-9787-9930-2 Transport Mechanism Kit Transport Mechanism End Clip

62-9786-9930-4 Stroke Adjuster Kit Stroke Adjuster End Clip

62-9680-9732-9 Handle/Controller Kit, Circuit Board/ Handle Screws (6)

120V RH Handle Assy Spring

LH Handle Trigger Pin

E-Ring Heat Block Inserts (1 set)

End Clip

62-9680-9734-5 Small Parts Kit Trigger Handle Screws (6)

Spring (3) Hanger Clip (2)

E-Ring (3) Heat Block Inserts (3 sets)

Trigger Pin (3) End Clip (2)

62-9680-9920-0 Power Cord Kit, 120V Power Cord Assy E-Ring

Handle Screws (6) Spring

Ground Screw Trigger Pin

End Clip

62-9680-9731-1 Heater Kit, 120V Heater Clip Heater Clip Screw

Handle Screws (6) E-Ring

Spring Trigger Pin

Heater (2)/ End Clip

Thermal Cut-off/

On-Off Switch Assy

62-9234-9930-5 Valve Assembly Kit Valve Assembly Nozzle Tip

62-9680-9851-7 Temperature Module #1 Kit Temperature Module #1 (3 ea.)

62-9680-9852-5 Temperature Module #2 Kit Temperature Module #2 (3 ea.)

62-9680-9853-3 Temperature Module #3 Kit Temperature Module #3 (3 ea.)

62-9680-9854-1 Temperature Module #4 Kit Temperature Module #4 (3 ea.)

62-9680-9855-8 Temperature Module #5 Kit Temperature Module #5 (3 ea.)

62-9680-9856-6 Temperature Module Set Kit Temperature Module #1, 2, 3, 4, 5 (1 of each)

Accessories

3M Stock Number Description

62-9921-0066-9 .090 inch Fluted Tip

62-9922-0066-7 .063-inch Fluted Tip

62-9940-6920-1 .125-inch Fluted Tip

62-9946-6980-2 .072-inch Brass Extension

62-9725-9930-2 Mini-Extension Tip, .072-inch Opening

62-9726-9930-0 “T” Tip w/Adapter

62-9727-9930-8 “L” Tip w/Adapter

62-9729-9930-4 High Viscosity Valve (recommended for use with adhesives 3779, 3789, 3747)

62-9785-9930-6 .070-inch Tapered Aluminum Extension

62-9945-9935-5 Bench Stand

Temperature Module Selections for

3M™ Scotch-Weld™ Hot Melt Quadrack™ Adhesives

Scotch-Weld Temperature

Adhesive Description Color Resistance Module

3731 Q A 100% solid, high heat resistant Off-White 265°F (129°C) (5)

thermoplastic adhesive for bonding a variety

of substrates including low surface energy

plastics like polypropylene, polyethylene

and many other plastics.

3738 Q High delivery rate, multi-purpose Tan 130°F (55°C) (4)

adhesive with long bonding range

and good performance properties.

3747 Q Good adhesion to a variety of plastic Tan 145°F (63°C) (4)

and wood with good heat resistance,

long bonding range, and high delivery

rate.

3748 Q Outstanding adhesive for rigidizing Off- 175°F (80°C) (4)

and attaching components to printed White

circuit boards. Good adhesion to many

plastics including polyolefins. Offers

good shock and heat resistance.

3748 V-O Q Self-extinguishing version of 3748 Light 175°F (79°C) (4)

adhesive which meets UL 94 and UL Yellow

1410 requirements. Can bond to FRP,

epoxy board, polypropylene, polyethylene.

3762 Q A rapid-setting, low viscosity Tan 130°F (55°C) (3)

adhesive that exhibits excellent “hot tack”

properties. Can be used on most paper

and paper products.

3762LM Q Similar to 3762 Q adhesive Cream 130°F (55°C) (1)

except applied at a substantially

lower temperature.

3764 Q Clear, high performance adhesive Clear 140°F (60°C) (4)

for many types of plastics, glass and

wood, such as acrylic, polyolefins,

polystyrene, polyester, and polycarbonate.

Exhibits outstanding resistance to shock at

both 72°F and 0°F.

3776LM Q Medium performance, low Tan 140°F (60°C) (1)

temperature applied adhesive. Can

bond many light weight materials

to light gauge metals.

Temperature Module Selections for

3M™ Scotch-Weld™ Hot Melt Quadrack™ Adhesives

Scotch-Weld Temperature

Adhesive Description Color Resistance Module

3779 Q High performance adhesive for Amber 300°F (149°C) (5)

many electrical or electronic applications.

Meets UL 94 V-O requirements.

3789 Q High performance, general purpose Light 220°F (105°C) (5)

adhesive with good resistance to Yellow

plasticizer migration. Bonds many

plastics including supported and

unsupported vinyls.

3792 Q Clear, general purpose adhesive Clear 140°F (60°C) (4)

has a long open time and good delivery

rate. Excellent adhesion to many plastics,

glass, and wood. Exhibits good resistance

to shock at both 0°F and ambient temperatures.

3792LM Q Similar to 3792 Q adhesive except Clear 140°F (60°C) (1)

applied at substantially lower temperature.

Important Notice

User is responsible for determining whether the 3M product is fit for a

particular purpose and suitable for user’s method of application.

Please remember that many factors can affect the use and performance of

a 3M product in a particular application. The materials to be bonded

with the product, the surface preparation of those materials, the product

selected for use, the conditions in which the product is used, and the time

and environmental condition in which the product is expected to perform

are among the many factors that can affect the use and performance of a

3M product. Given the variety of factors that can affect the use and

performance of a 3M product, some of which are uniquely within the

user’s knowledge and control, it is essential that the user evaluate the 3M

product to determine whether it is fit for a particular purpose and suitable

for the user’s method of application.

Caution

Use only the proper temperature

module for the 3M™ Quadrack™

adhesive used. Failure to do so

may cause burns or damage

applicator. Refer to Table 1 in the

Temperature Module Installation

section for proper module selection

for 3M Quadrack adhesive used.

Warranty and Repair

During Warranty Period

Contact your nearest 3M sales branch or authorized 3M™

Scotch-Weld™ Hot Melt Adhesive distributor.

After Warranty Period

The 3M™ Scotch-Weld™ Hot Melt Applicator EC has been engineered

to be durable and reliable. Recognizing that it will eventually need

maintenance, we have made it easy to disassemble and repair.

Should your 3M Scotch-Weld Hot Melt Applicator EC require repair,

you can order replacement part kits from your local authorized 3M

Scotch-Weld Hot Melt distributor or from the nearest 3M sales branch

listed on the back cover.

Important Notice: User is responsible for determining whether the

3M Scotch-Weld Hot Melt Applicator EC is fit for a particular purpose

and suitable for user’s method of application.

Warranty: 3M warrants for 12 months from the date of purchase or

use, whichever occurs first, that the 3M Scotch-Weld Hot Melt

Applicator EC will be free of defects in material and manufacture. 3M

MAKES NO OTHER WARRANTIES, EXPRESS OR IMPLIED,

INCLUDING, BUT NOT LIMITED TO, ANY IMPLIED WARRANT

OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR

PURPOSE OR ANY IMPLIED WARRANT ARISING OUT OF A

COURSE OF DEALING,CUSTOM, OR USAGE OF TRADE; This

warranty does not cover routine maintenance, normal wear and tear, or

damage resulting from accident, misuse, alteration, corrosion, lack of

reasonable care, service performed by an unauthorized repair service,

use of unauthorized replacement parts or accessories, or installation,

use,operation, or maintenance not in accordance with 3M

recommended procedures, or use of adhesive sticks not manufactured

by 3M or not subject to 3M quality standards.

Limitation of Remedies: If the 3M Scotch-Weld Hot Melt Applicator

EC is proven to be defective within the warranty period stated above,

THE EXCLUSIVE REMEDY, AT 3M’S OPTION, SHALL BE TO

REFUND THE PURCHASE PRICE OF OR TO REPAIR OR

REPLACE THE DEFECTIVE 3M APPLICATOR, provided that the

defective applicator is, at 3M’s choice, returned immediately to 3M, or

an authorized service representative designated by 3M, or made

available at user’s premises in a location suitable for servicing.

Limitation of Liability: 3M shall not otherwise be liable for any

losses or damages, whether direct, indirect, special, incidental, or

consequential, regardless of the legal or equitable theory asserted,

including contract, negligence, warrant, or strict liability.

Mouser Electronics

Authorized Distributor

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