Graco HVLP Series Instructions-Parts List Manual page 18

Replacing the Air Valve (243840)
The air valve (25) cannot be repaired. If it is damaged,
the entire piece must be replaced.
To remove the air valve, use a screwdriver to gently
push the valve back about 0.25", then gently pull it out
of the back of the gun. Insert the new air valve, twist
counter–clockwise (approximately one–half turn) until it
is securely seated in the back of the gun. Fig. 24.
Fig. 24
Replacing the Duckbill Valve (Kit –
244135)
If the duckbill valve is worn or broken, replace it with a
new one immediately. To replace the duckbill valve:
1. Lift the cover away from the cup.
2. Using a screwdriver, slightly pull the worn duckbill
valve and o–ring out of the lid.
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Service
3. Put the o–ring on the new duckbill valve.
4. Press the new duckbill valve and o–ring onto the
lid.
Fig. 25
Replacing the Cup Gasket (Kit – 240625)
If the gasket is worn or swelled, replace it with a new
one immediately. To replace the cup gasket:
1. Lift the cover away from the cup.
2. Remove the worn gasket.
3. Press a new gasket into the lid slot.
Fig. 26
Duckbill valve
TI0810
Cup Gasket