Graco 309550Y User Manual

Check your local electrical code and proportioner man-
ual for detailed grounding instructions.

Ground the spray gun through connection to a 
Graco-approved grounded fluid supply hose.

Spraying materials containing isocyanates creates 
potentially harmful mists, vapors, and atomized par-
ticulates.

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 providing sufficient ventila-
tion in the work area. If sufficient ventilation is not 
available, a supplied-air respirator is required for 
everyone in the work area.

To prevent contact with isocyanates, appropriate per-
sonal protective equipment, including chemically 
impermeable gloves, boots, aprons, and goggles, is 
also required for everyone in the work area.

To prevent cross-contamination of the gun’s wetted 
parts, do not interchange A component (isocyanate) 
and B component (resin) parts. The gun is shipped 
with the A side on the left. The fluid manifold, fluid 
housing, side seal cartridge, check valve cartridge, 
and mix chamber are marked on the A side. 

Read warnings, page 8.

Read warnings, page 7.

To engage piston safety lock: push knob in and turn 
clockwise. If engaged, gun will not actuate. 

To disengage piston safety lock: push knob in and 
turn counterclockwise until it pops out. There will be a 
gap between knob and gun body.

TI2409A

Engaged

TI2410A

Disengaged