Manifold Blockage Check; Pump Procedures; Preparing For Repairs - Nordson 3400 Manual

B 2-10
Pump

3. Pump Procedures

Preparing for Repairs

B2EN-02-[3-PUMP]-5

Manifold Blockage Check

1. Stop the pump.
2. Standard manifold filter: Open the manifold drain valve.
Reverse-flush manifold filter: With the manifold filter in the RUN
position, open the right-side drain valve.
3. Start the pump.
S
Adhesive flows: filter is clear and manifold is not blocked. Return
to the troubleshooting table.
S
Adhesive does not flow: manifold may be blocked. Turn the
pump off and remove the manifold filter. Check for blockage in
the manifold and remove any blockage. Clean the manifold filter if
necessary. Refer to Cleaning a Manifold Filter in the Maintenance
section.
Use these procedures to replace the pump, to replace any pump
component, or to clean pump components. Refer to the parts lists at the
end of this section for the part numbers of any components that need to
be replaced. You can also use the parts list illustration as a guide as you
perform the following procedures.
Follow this procedure to safely prepare for pump repairs.
1. Make sure the melter is at operating temperature.
2. Make sure the adhesive level in the hopper is lower than the pump
cavity.
3. Relieve hydraulic pressure. Refer to Relieving Hydraulic Pressure in
the Maintenance section.
4. Place the melter circuit breaker in the OFF position, disconnect and
lock out electrical power to the melter at the branch circuit disconnect
switch, and disconnect and lock out electrical power supplied through
any I/O wiring.
41-3000
Issued 11/00
E 2000 Nordson Corporation
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