!
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.
© 3M 2006
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