Graco Express 3900 Operation page 12

Cleanup
6. Move gun to waste pail, hold gun against pail, and
trigger gun to thoroughly flush system. Release trig-
ger and engage trigger lock.
7. Turn prime valve down to DRAIN position and allow
flushing fluid to circulate until flushing fluid appears
clear.
8. Turn prime valve forward to SPRAY position. Trig-
ger gun into flushing pail to purge fluid from hose.
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9. Raise siphon tube above flushing fluid and run
sprayer for 15 to 30 seconds to drain fluid. Turn
pump switch and engine OFF.
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10. Turn prime valve down DRAIN position.
11. Remove filters from gun and sprayer, if installed.
Clean and inspect. Install filters.
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12. If flushing with water, flush again with mineral spir-
its, or Pump Armor, to leave a protective coating to
prevent freezing or corrosion.
13. Wipe sprayer, hose and gun with a rag soaked in
water or mineral spirits.
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