Graco 256855 Repair Manual page 6

Check Valve Troubleshooting
Recommended if fluid is in the check valve.
Poppet Valve Quick Clear
1. Disconnect check valve from
siphon cup air hoses.
2. Unscrew check valve.
3. Pull out on nub on poppet
valve and release.
4. Assemble check valve. Install
on air hoses.
5. Try spraying again to see if
spraying is normal.
Check Valve Cleaning
1. Do steps 1 and 2 of Poppet Valve Quick Clean.
2. Unscrew poppet valve from
check valve.
3. Clean all parts in solvent rec-
ommended by spray material
manufacturer.
4. After all parts are dry apply a light coat of petroleum
jelly all over o-ring.
5. Assemble check valve. Install on air hoses.
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ti13104a
ti13105a
ti13106a
ti13107a
Needle Replacement
Removal
1. Relieve pressure.
2. Remove air cap (1).
3. Push trigger slide (4) over to NEEDLE REMOVAL
position (D) shown in Component Identification, page
4.
4. Remove fluid nozzle (2).
5. Pull needle (3) out.
Installation
1. Insert needle (3).
2. Install fluid nozzle (2).
3. Push trigger slide (4) over to SPRAY position (E)
shown in Component Identification, page 4.
4. Install air cap.
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1
Operation
4
3
2 5
ti12766a
313317H