Graco 17C487, Repair Manual

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Repair
10 334599F
4. Tap piston rod out of cylinder with a
hammer or flip over and tap piston rod
out against a bench.
5. Unscrew piston valve from piston rod.
6. Clean and inspect parts. (The piston
has a special thread locking/sealing
patch. Apply thread sealant to the
threads.
Do not clean or wipe the piston valve
threads. Cleaning the piston valve
threads could destroy the special sealing
patch and cause the piston valve to come
loose during operation, causing a pump
burst and possible serious bodily injury.
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