Flushing Guidelines - Graco Roof Rigs 224483 Instructions-Parts List Manual

WARNING
To reduce the risk of serious injury, including fluid
injection, always follow the Pressure Relief Proce-
dure Warning on page 8 before checking, adjust-
ing, cleaning, or shutting down the sprayer.
When To Flush
1. Flush a new sprayer to remove the protective oil.
Before using water–base coating, flush with a com-
patible solvent, then warm, soapy water, and then
clean water.
Before using oil–base coating, flush with a compat-
ible solvent.
2. Changing coatings. Use a compatible solvent.
3. Changing from water–base to oil–base coating.
Flush with warm, soapy water, and then a compatible
solvent.
4. Changing from oil–base to water–base coating.
Flush with a compatible solvent, then warm, soapy
water, and then clean water.
5. Storage.
Flush the pump only with a compatible solvent, fol-
lowed by an oil–base solvent, such as mineral spirits.
Leave the drain valve open!
6. Startup after storage.
Before using water–base coating , flush out the com-
patible solvent with warm, soapy water, and then with
clean water.
When using oil–based coating, flush out the compat-
ible solvent with the coating to be sprayed.
How To Flush The Pump Only
1. Relieve pressure. Leave the drain valve open. See
Fig. 5.
2. Disconnect the siphon assembly.
3. Put the pump in a grounded metal pail of water or
compatible solvent.
4. Start the sprayer – see page 10. Flush until the ball
in the foot valve is clean and moves up and down
easily.
How To Flush The Entire Fluid System
1. Relieve pressure. Leave the drain valve open. See
Fig. 5.

Flushing Guidelines

2. Put the siphon tube in a grounded metal pail of water
or compatible solvent.
3. Start the sprayer. Trigger the gun into the coating
container just until water or solvent comes from the
nozzle. Release the trigger.
4. Move the gun to the grounded flushing container.
Trigger the gun until clean water or solvent comes
from the it. See Fig. 6. Release the trigger and en-
gage the safety latch. Open the drain valve to clean
it.
5. Check all fluid connections for leaks. Relieve pres-
sure before tightening any connections. Start the
sprayer. Recheck the connections for leaks.
6. Remove the siphon tube from the solvent pail. Disen-
gage the gun safety latch. Trigger the gun to force
water or solvent from the hose. Do not let the pump
run dry for more than 30 seconds to avoid damaging
the pump packings! Relieve pressure.
PRESSURE
DRAIN VALVE
shown in closed
position
Fig. 5
Fig. 6
0553
Maintain firm
metal-to-metal contact
when flushing to
reduce the chance of
static sparking and
splashing.
0406