Theory Of Operation - Graco 309550Y Instructions - Parts Manual

Troubleshooting

Theory of Operation

Gun Triggered (Fluid Spraying)
KEY
Purge Air
Mix chamber (19) moves back, shutting off purge air
Fluid
flow. Impingement ports (IP) align with fluid ports of side
seals (18c), allowing fluid to flow through mix chamber
Cleanoff Air
nozzle (N).
Grease
TI3547a
See page 13 to adjust cleanoff air valve (K).
Flow paths are not shown to scale, for clarity.
G
KEY
Purge Air
19
AC
Fluid
IP
Cleanoff Air
Grease
TI3547a
Flow paths are not shown to scale, for clarity.
19 18c
IP
N
TI3546a
K N
TI3545a
Gun Detriggered (Air Purging)
Mix chamber (19) moves forward, shutting off fluid flow.
Impingement ports (IP) open to air chamber (AC), allow-
ing purge air to flow through mix chamber nozzle (N).
See page 14 for use of grease fitting (G).
309550Y 25