Graco HydraSprayr 230975, Instructions Manual

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Flushing
When to Flush
1. New sprayer. Your new sprayer was factory tested
with lightweight oil which was left in to protect
pump parts from corrosion.
Before using oil–base paint, flush with mineral
spirits only.
Before using water–base paint, flush with
mineral spirits, followed by soapy water, then a
clean water rinse.
2. Changing colors. Flush with a compatible solvent
such as mineral spirits.
3. Changing from water–base to oil–base paint.
Flush with soapy water, then mineral spirits.
4. Changing from oil–base to water–base paint.
Flush with mineral spirits, followed by soapy water,
then a clean water flush.
5. Storage.
Water–base paint: flush with water, then mineral
spirits and leave the pump, hose and gun filled
with mineral spirits. Follow the
Pressure Relief
Procedure Warning, page 10.
Oil–base paint: flush with mineral spirits. Follow
the Pressure Relief Procedure Warning , page
10.
6. Startup after storage.
Before using water–base paint, flush out mineral
spirits with soapy water and then clean water.
When using oil–base paint, flush out mineral
spirits with fluid to be sprayed.
How to Flush
WARNING
SKIN INJECTION HAZARD
Follow the Pressure Relief Procedure
Warning on page 10. Remove the spray
tip before flushing.
1. Engage the gun safety latch. Remove the spray tip
from the gun.
2. Pour enough clean, compatible solvent to fill the
pump and hoses into a large, grounded metal pail.
3. Place the suction tube into the pail or tilt the
sprayer back (it will support itself) and place the
pail under the pump. Then tilt the sprayer forward
to lower the pump into the pail.
4. Turn the pressure control knob counterclockwise
until all spring tension is relieved. You will be able
to feel it. The sprayer is now set at the lowest
pressure setting. Turning the knob further will
remove it. Tighten the knob locknut to set. See Fig
5.
5. Open the bypass valve. The valve lever will be
parallel to the body of the valve. See Fig 5.
6. Attach fuel hose from tank to engine.
7. Close the choke by moving the choke lever. See
Fig 5.
CAUTION
The bypass valve must be opened when starting the
sprayer to prevent damaging the starter.
8. Turn and hold the ignition key to START until you
hear the engine “catch”, then release the key to RUN.
See Fig 5. If the engine does not start, open the
choke a little (move lever). If the engine floods, open
the choke all the way and try again.
Fig 5
7874b
PRESSURE
CONTROL
KNOB
BYPASS
VALVE
ON/OFF
SWITCH
AIR FILTER
CHOKE
9. After the engine is warm, gradually open the choke
lever (move lever) and close the bypass valve.
See Fig 5.
10. Point the gun into the grounded metal pail and hold
a metal part of the gun firmly against the pail.
NOTE: To save the fluid in the pump and hose, trigger
the gun into the paint container or a separate
clean container. At the same time, slowly turn the
pressure control knob clockwise just enough to
start the pump. When solvent appears, release
the trigger and continue as below.