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Repair
Repair
If the unit is hot, determine whether or not you
can service the unit after it has cooled down.
Some materials, like polyurethanes, may cure
permanently when cooled and exposed to air,
preventing you from disassembling the dis-
pense valve. If you are working with such a
material, service the unit while the material is
at a temperature where the material is soft
enough to work with. If the material can be
reheated at a later time, you can service the
unit after it has cooled, reheating the material
as necessary.
Perform this procedure before servicing the
dispense valve.
1. Make sure material flow has been shut off.
2. Relieve the system pressure, page 11.
3. Make sure system air has been shut off.
4. Remove power by disconnecting the elec-
trical cable plug.
5. If the material in the dispense valve can be
reheated, wait for the dispense valve to
cool thoroughly before servicing it.
If the material in the dispense valve cures
permanently when cooled and/or exposed
to air, service the unit while the material is
at a temperature where the material is soft
enough to work with.
6. Disconnect the air section to repair the
valve. See Disconnect.
16
Disconnect
NOTE: Always replace o-rings after the valve
has been disassembled.
The u-cup cartridge, fluid section o-rings, and
seat seal can be replaced without disconnect-
ing the valve from the mounting equipment, or
material hoses.
1. Follow steps 1 through 5 from Repair.
2. If the fluid section (101) is not mounted,
place fluid section in a vise. Place a wrench
on the bottom air housing (102) flats and
disconnect the fluid and air sections.
3. If necessary, replace the old air section with
a new air section to reduce downtime.
Bring the old air section to a work bench for
repair.
105
101
F
. 6
IG
Connect
1. If the fluid section is not mounted, place
outlet fitting (105) in a vise.
2. Tighten air section to fluid section (101).
Torque to 30 ft-lbs (41 N•m).
102
r_v1m350_3a0412a_72b
3A1792A
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