Graco Ultra MAX II 490 PC Pro Operation, Parts page 21

Fast Flush Hose and Gun
7. To flush airless hose and spray gun, turn
prime valve horizontal.
8. Hold gun against waste pail. Disengage
trigger lock. Trigger gun and turn
pressure control to Fast Flush operate
until the pump runs steady and flushing
fluid appears.
9. Stop triggering gun.
3A6491E
10. Raise fluid intake above flushing fluid.
11. With prime valve horizontal. Trigger gun
into flushing pail to purge fluid from hose.
12. Engage trigger lock.
Operation
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