Graco GH 130 Repair Manual page 7

4. Tap piston rod out of cylinder with a
hammer or flip over and tap piston rod
out against a bench.
5. Remove piston rod from sleeve.
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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.
6. Unscrew piston valve from piston rod.
Repair
7