Graco A Series Instructions-Parts List Manual page 8

Flushing the Cleanshott Shut- - off Valve
Rotate the spray valve knob counter--clockwise to the
flush position (see Using the Cleanshott Shut- -off
Valve on page 6), and follow the Flushing the In-
Line Gun procedure below.
Flushing the Contractort In-Line Gun
Always flush the in-line valve thoroughly when you
stop spraying for the day and before the fluid being
sprayed can dry or set up in the system.
WARNING
FIRE AND EXPLOSION HAZARD
To reduce the risk of a serious injury
from fluid injection, static sparking, or
splashing fluid in the eyes on or the skin,
follow these precautions when flushing:
D Be sure entire system and flushing pails are
properly grounded. See Electrical Grounding
on page 5.
D Remove spray tip.
D Use lowest possible fluid pressure.
D Maintain firm metal-to-metal contact between
pole gun and pail during flushing.
D Follow the Pressure Relief Procedure on page
4 whenever you are instructed to relieve
pressure.
1. Use a solvent that is compatible with wetted parts
of pole gun, rest of system, and material being
sprayed.
2. Follow flushing instructions for your spray system
or pump.
8 309237
Operation
3. If flushing with water, flush last with a rust inhibitor
or Graco Pump Armor to protect the system from
corrosion.
4. If necessary, disassemble pole gun and clean all
passages thoroughly with a soft-bristled brush.
Do not soak the entire in-line valve in solvent.
Prolonged exposure to solvent can ruin the
packings.
Checking the Gun Diffuser Operation
Check the diffuser operation weekly. The gun/diffuser/
seat (A) breaks up spray and reduces the risk of fluid
injection when the tip is not installed. Perform the test
below. If it fails, replace the entire Needle Kit, 218070.
Diffuser/seats are not sold separately since the gun will
leak if an old needle is used with a new diffuser/seat.
1. Follow Pressure Relief Procedure on page 4.
2. Remove the tip guard and spray tip.
3. Start the sprayer and adjust it to the lowest pres-
sure.
4. Aim the gun into a grounded metal pail while
holding it firmly to the pail. Trigger the gun. If the
fluid emitted is not diffused into an irregular
stream, replace the entire needle kit immediately.
Fig. 5
CAUTION
A