Graco Inc. 231-353 - Manual (Page 7)

308-548 7
Operation
How to Use the Gun Trigger Safety
WARNING
INJECTION HAZARD
If the gun still sprays when the gun trig-
ger safety is locked, repair the gun. See
manual 308–645, supplied.
1. To engage the gun trigger safety, turn the latch
counterclockwise toward the handle until the
detent of the latch locks on and the pin is at a right
angle with the gun body. See Fig. 3.
2. To disengage the gun trigger safety, turn the latch
clockwise away from the handle to unlock the
detent of the latch and turn the pin 180_ from the
gun body.
ENGAGED DISENGAGED
05964
PIN
LATCH
Fig. 3
How to use the pressure drain valve.
Use the pressure drain valve to relieve fluid pressure
from the pump and to help prime the pump. If the valve
senses an over pressure condition, it opens automati-
cally to relieve fluid pressure. If this happens, stop
spraying immediately, shut off and unplug the sprayer.
Determine the cause of the problem and correct it be-
fore operating the sprayer again. Refer also to the
Troubleshooting, page 14. See Fig. 4.
Closed, or spray position
Open or drain, position
Fig. 4
1
2
1
2
04646
How to use the pressure control.
The pressure control controls the motor operation so
the sprayer maintains constant fluid pressure at the
pump outlet. Turn the pressure control knob fully coun-
terclockwise to obtain the minimum setting. Turn the
knob clockwise to increase pressure. See Fig. 5.
Fig. 5
01022A