Graco GMAX 3400 Operation page 26

Cleanup
8. Turn prime valve forward to SPRAY position.
Trigger 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
10. Turn prime valve down DRAIN position.
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11. Remove filters from gun and sprayer, if installed.
Clean and inspect. Install filters.
12. If flushing with water, flush again with mineral
spirits, 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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