Nordson 2302 - Page 53

Preventive Maintenance
5-3
3. Week/y maintenance
Filter assemb[y cleanhg
Clean the adhesive filter once a week, unless operating experience
indicates that more or less frequent cleaning is required. Refer to the
filter assembly parts list and illustration in Section 8 of this manual as
needed when performing this procedure.
WARNING: Risk of burns. Wear protective clothing/safety
goggles/gloves (P/N 902 514) during the following procedure.
1. Heat the system to operating temperature.
NOTE: The applicator must be at operating temperature before the
filter is removed for cleaning.
2.
3.
Reduce the pump air pressure to zero (0) at the regulator.
Trigger the gun(s) until the system is relieved of all pressurized
molten material.
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0
WARNING: Before performing the next step, be sure that all
system pressure has been relieved to avoid the spraying of
molten material.
4.
Place a pan or other suitable waste container under the drain valve.
Open the manifold drain valve.
5.
Increase the pump air pressure until adhesive material flows steadily
from the drain. Allow material to flow until it is clean and free form all
-
contaminants.
6. Shut off the input air pressure to the pump at the regulator.
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WARNING: Risk of burns. The use of a straight wrench in
l
the following step may result in the hand being under the
filter when the connection is broken.
7.
8.
9.
Use a 14 inch or 13 mm socket wrench to unscrew the filter
assembly and remove it from the manifold.
Remove the screw from the filter bung and disassemble the filter.
There are several methods for cleaning the filter screen depending
on the type of hot melt adhesive material used, as noted below.
WARNING: Risk of explosion or fire. Fire, open lights and
smoking prohibited.
a. Place the filter components in a container of Nordson Type R
solvent and heat it above the melting point of the melting
temperature of the adhesive. Scrub the filter screen with a fine
bristle brush.
.
0 Nordson Corporation 1994
All Rights Reserved
PIN 106 701A
41.2300SP - Issued 1194