Theory Of Operation - Graco A Series Instructions - Parts Manual

Theory of Operation

Gun Triggered (Fluid Spraying)
Purge rod (31) moves back, opening impingement ports
(IP). Components A and B combine in Polycarballoy Mix
Module (39). Fluid sprays from CeramTip (40).
Cleanoff air flows whether gun is triggered or detrig-
gered. See page 12 to adjust.
KEY
Fluid
Cleanoff Air
31
30
IP
39
TI3882a
Gun Detriggered (Mechanical Purging)
Purge rod (31) moves forward, closing impingement
ports (IP) and shutting off fluid flow. Rod pushes through
Polycarballoy Mix Module (39) and bottoms on
CeramTip (40), forcing out excess fluid and restoring
proper orifice diameter.
Cleanoff air flows whether gun is triggered or detrig-
gered. See page 12 to adjust.
KEY
Fluid
Cleanoff Air
40
Troubleshooting
31 IP
39 40
309856A
TI3881a