Graco GM 5000 User Manual

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Flushing
When to Flush
1. New Sprayer. This unit was factory tested in light-
weight
oil, which was left in to protect the pump.
Before using water–base paint, flush with mineral
spirits, followed by a soapy water flush, and then a
clean
water flush.
Before using oil–base paint, flush with mineral spir-
its.
2. Changing Colors.
Flush with a compatible solvent
such
as mineral spirits or water .
3. Changing from water–base to oil–base paint.
Flush
with
warm, soapy water, then mineral spirits.
4. Changing from oil–base to water–base paint. Flush
with
mineral spirits, followed by warm, soapy water ,
and then a clean water flush.
CAUTION
NEVER leave water in the sprayer if there is the
slightest chance it could freeze. Push the water out
with
mineral spirits. W ater frozen in the pressure con -
trol tube prevents the sprayer from being started, and
causes serious damage to the pressure control.
5. Storage.
Water base paint: flush with water , then mineral spir -
its and leave the pump, hose and gun filled with min -
eral spirits. Shut off the sprayer, remove the spark
plug cable, and open the pressure drain valve to re -
lieve
pressure. Leave the drain valve open.
Oil base paint: flush with mineral spirits and leave the
pump, hose and gun filled with mineral spirits. Shut
off the sprayer, remove the spark plug cable, and
open the pressure drain valve to relieve pressure.
Leave
the drain valve open.
6. Startup after storage.
Before using water–base paint , flush out mineral
spirits
with soapy water , and then with clean water .
When using oil–based paint, flush out the mineral
spirits
with the paint to be sprayed.
How to Flush
NOTE: “Solvent” refers to water or oil-based solvent.
1. Relieve pressure. See page 14.
2. Remove the filter bowl (R) and screen (S); see in-
struction
manual 307–273, supplied. Install the bowl
and support (T), without the screen, to flush. Clean
the
screen separately . See Fig. 5.
3. Close the pressure drain valve (53).
4. Put the suction tube in a grounded pail of solvent.
5. Remove the spray tip from the gun(s).
WARNING
To reduce the risk of static sparking and splashing
when
flushing, always remove the spray tip from the
gun, and hold a metal part of the gun firmly to the side
of, and aimed into, a grounded metal pail .
Maintain firm
metal-to-metal
contact when
flushing
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6. Follow Startup on page 12. Keep the gun triggered
until clean solvent comes from the nozzle. Release
the
trigger and engage the trigger safety latch.
NOTE: For two guns, release the trigger safety latch on
the second gun and trigger that gun until clean solvent
comes from the nozzle. Flush the first gun and then the
second
gun at least one more time.
7. Check all fluid connections for leaks. Relieve pres-
sure before tightening any connections. Start the
sprayer.
Recheck the connections for leaks.
8. Remove the suction tube from the solvent pail. Dis-
engage the trigger safety latch. Trigger the gun to
force solvent from the hose. Do not let the pump run
dry for more than 30 seconds, to avoid damaging the
pump packings. Relieve pressure.
9. Remove the strainer , suction tube and suction hose
and clean them separately to be sure all paint sedi-
ment is removed. Dried paint can build up in these
parts
and later cause performance problems.
10. Unscrew the filter bowl and reinstall the clean
screen.
Reinstall the bowl, hand tight only .
11. Follow Storage or Changing Colors, to the left. Re-
lieve
pressure.
Fig. 5
014
2
53
R
S
T

Graco GM 5000 Specifications

General

Brand	Graco
Model	GM 5000
Category	Paint Sprayer
Language	English