© 3M 2006
23
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
