Nordson AD-31 Series - Replacing an Existing Gun; Relieving Hydraulic Pressure

7-34
Repair
9.
Replacing
an Existing
Gun
Rel ievi n
g
Hyd rau li
c P ressu re
CAUTION: The Nordson
handgun,
sensor, and cordset are not
compatible with similar components of other brands; therefore,
to
prevent
a
possible
hazard when replacing an existing
non-Nordson handgun
with
any Nordson RTD handgun,
you
will
need
to obtain and
install
a
cordset
conversion
kit. See
your
Nordson
representative. Possible hazards include runaway
temperature and failure to obtain an adequate
ground.
Replacing an existing handgun
with
a new one involves five operations:
o
relieving hydraulic
pressure
and
purging
the hose
.
removing the old handgun
o
installing
the replacement
gun
o
checking for leaks
o
restarting
the system
Procedures for each of the above operations follow.
Use
this
general procedure
to
relieve hydraulic
pressure.
For the most
up-to-date
instructions
and
for instructions
specific to
your
applicator,
refer
to
your
applicator
product
manual.
WARNING: Risk of burns. Failure to relieve system
pressure
can result in hot adhesive spraying from a connecting
point,
possibly
causing serious burns. Before removing a hose, a
handgun, or any other
part
of
the
pressurized
system,
you
must
first relieve
system
pressure.
Before relieving hydraulic
pressure, gather
the following:
.
appropriate
protective
clothing
o
waste container capable of
withstanding
230
'C
(450
"F)
.
two collecting
pans
.
cleaning cloth
.
6-mm
(t/4-in.)
flat-blade screwdriver
1. Heat the system to operating temperature.
2. Turn
off the applicator
pumps.
3. Place a collecting
pan
under the applicator's filter drain
valve
ATEN{8-[AD-31EXl-l
42-72
lssued 10/95
@
1995 Nordson
Corporation
All rights reserved