RTD-Style Hot Melt Hose
21
Periodic Maintenance
lnspecting Hose Hydraulic
Connections
Perform
periodic
maintenance as often as required by the operating
conditions and the environment.
The
entire
hot melt application system, including the hoses, must be
flushed
periodically.
Flushing
removes
excess dirt and charred
material.
Also, clean the system if the adhesive in the system is changed, and the
old and new adhesives are incompatible.
The system cfeaning
procedure
is
presented
in Maintenance Section, ot
the
applicator technical manual.
WARNING: Hot. Risk of burns. Hot applicator
parts,
splashed
hot melt
adhesive
material,
and hot
gun
surfaces can cause
severe burns.
Wear
heat-protective clothing, safety
goggles,
and safety
gloves
while replacing hoses.
1. Heat
the system to operating temperature
WARNING:
System or material
pressurized.
Relieve
pressure.
Failure to
observe
may
result
in
serious burns.
2. Follow
the
procedures
described in
your
applicator manual to relieve
system
pressure.
ln
general,
relieving system
pressure
requires that
you perform
all of
the
following
actions that are
appropriate for
your
unit:
Systems
with
a
piston pump:
Reduce
pump
air
pressure
to zero and disconnect the supply
(incoming)
air line.
Place
the air
pump
ON/OFF switch in the OFF
position.
Systems with a
gear pump:
Turn the motor speed dialto
0%.
Place the motor ON/OFF
(or
START/STOP) switch in the OFF
(or
STOP)position.
o
@
2000 Nordson Corporation
All rights reserved
108232E
lssued 1/00
Manual 45-21
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