Graco GH 130 Repair Manual page 8

Repair
7. Clean and inspect parts. (The piston has
a special thread locking/sealing patch.
Do not remove the patch. The patch
allows for disassembly/assembly
procedures before it is necessary to
apply thread sealant to the threads. On
fifth assembly apply thread sealant to
threads.
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8. Remove and discard throat packing and
glands from the cylinder.
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