Pump
B 2-3
E 2000 Nordson Corporation
All rights reserved
41-3000
Issued 11/00
B2EN-02-[3-PUMP]-5
Problem Possible Cause Corrective Action
2. Wavy beads Adhesive too cold Check the tank, hose, or gun
temperature setpoints and adjust
them as necessary.
Ambient temperature below freezing
or guns subject to draft
Protect the melter and guns from
freezing temperature conditions and
drafts.
Nozzles too far from product Position the guns so the nozzles are
no more than 13 mm (0.5 in.) from
the product.
3. Excessive adhesive at
beginning of bead
Nozzles too far from product Position the guns so the nozzles are
no more than 13 mm (0.5 in.) from
the product.
Nozzles partially clogged Clean the nozzles. Refer to the
nozzle cleaning procedure in the gun
manual.
4. Adhesive stringing Nozzle too far from product Position the guns so the nozzles are
no more than 13 mm (0.5 in.) from
the product.
Adhesive too viscous Change to a compatible
lower-viscosity adhesive.
Adhesive too cold Check the tank, hose, or gun
operating temperature setpoints and
adjust them as necessary.
Adhesive old Do not exceed the recommended pot
life of the adhesive.
5. Concentric circles in bead Adhesive too hot Check the tank, hose, or gun
operating temperature setpoints and
adjust them as necessary.
Adhesive not viscous enough Change to a compatible
higher-viscosity adhesive.
6. Adhesive bouncing or
splashing from product
Adhesive too hot Check the tank, hose, or gun
operating temperature setpoints and
adjust them as necessary.
Adhesive not viscous enough Change to a compatible
higher-viscosity adhesive.
Nozzle orifice too large for
application
Change to a nozzle with a smaller
orifice.
Too much hydraulic pressure Decrease hydraulic pressure.
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