Graco 24T918, Instruction Manual

Page: 37 / 130

Maintenance
333347F 37
Maintenance
Replace Outlet Filter
The outlet filter is designed to prevent small contami-
nants from entering the hoses and applicators. Inspect
filter regularly. Replace the filter after flushing and when
you change the adhesive used in the system.
1.
If the system is not up to temperature,
press to
enable the heaters and pump then wait for system
to reach operating temperature.
2. Perform
Pressure Relief Procedure
, page 33 but
do not allow system to cool. Adhesive must be a
fluid to perform this procedure.
3. Turn main power switch OFF.
4. Loosen two screws (8) then slide the small metal
shroud (28) on the back of the system up to remove.
See F
IG
. 25.
5. Use a 1 in. socket to unscrew outlet filter (236).
6. Insert allen wrench through the outlet filter cap to lift
outlet filter (236) out of the system.
7. Discard outlet filter assembly.
8. Place o-rings (232, 237) provided with new outlet fil-
ter onto new outlet filter (236).
9. Place new outlet filter with o-rings into housing.
Tighten with 1 in. socket.
10. Install small metal shroud (28) over outlet filter then
tighten two screws (8).
Replace Inlet Filter
The inlet filter is designed to prevent large items from
entering the system. The inlet filter can only be replaced
with the system empty.
1. Close the system air inlet ball valve.
NOTE:
Some adhesives have different melting points.
The first temperature tried should be approximately half
of the dispensing temperature. If dispensing at 400°F
(204°C), first try 200°F (93°C) then increase in 20°F
(11°C) increments. If dispensing at 250°F (121°C), first
try 125°F (52°C) then increase in 20°F (11°C) incre-
ments.
NOTE:
To ensure the adhesive is a gel, not a liquid, do
not remove inlet filter cap (215) when the temperature is
above the desired temperature. If the temperature is too
low, the adhesive viscosity may be too high to remove
the inlet filter (213). See F
IG
. 26, page 38.
2.
If the melter is below the desired temperature and
heating system is disabled,
press to enable
the heaters.
If the melter is above the desired temperature and
heating system is enabled,
press to disable
the heaters.
3. Wait until melter temperature is the desired tem-
perature.
F
IG
. 25
To avoid severe burns, wear protective gloves and
clothing that will insulate your hands and body from
the hot surfaces and material.
WLD
236
232
237
28
8
To avoid severe burns, wear protective gloves and
clothing that will insulate your hands and body from
the hot surfaces and material.