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Operation Basics
311320H 7
Operation Basics
Isocyanate Hazard
Keep A and B Components
Separate
Grounding
Check your local electrical code and propor-
tioner manual for detailed grounding instruc-
tions.
Ground the spray guy through connection to a
Graco-approved grounded fluid supply hose.
Coupling Block
Install Coupling Block
1. Inspect coupling block gaskets for damage
and wear. Replace if necessary.
2. With gaskets in place, fit coupling block to
gun block.
3. Insert coupling block mounting screw and
tighten securely with 5/16 in. nut driver.
FIG. 3: Coupling Block
To prevent accidental gun operation, always
disconnect air supply before servicing gun or
anytime gun is not in use.
Spraying materials containing isocyanates
creates potentially harmful mists, vapors,
and atomized particulates.
Read material manufacturer’s warnings and
material MSDS to know specific hazards
and precautions related to isocyanates.
Prevent inhalation of isocyanate mists,
vapors, and atomized particulates by provid-
ing sufficient ventilation in the work area. If
sufficient ventilation is not available, a sup-
plied-air respirator is required for everyone in
the work area.
To prevent contact with isocyanates, appro-
priate personal protective equipment, includ-
ing chemically impermeable gloves, boots,
aprons, and goggles, is also required for
everyone in the work area.
CAUTION
To prevent cross-contamination of the gun’s
wetted parts, do not interchange A compo-
nent (isocyanate) and B component (resin)
parts. The gun is shipped with the A side on
the left.
Coupling Block
Gaskets
Coupling Block
Mounting Screw