Gravely 950001, Maintenance Manual

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4. Firmly hold the piston rod in a soft jawed vice at the
rod clevis end. Note the piston retaining nut has
two centre punch marks to deform the thread and
hold the nut captive (see below).
5. Use the edge of a small angle grinder to remove
the deformed thread area (see below).
6. Remove the piston retaining nut (see below).
7. When the piston retaining nut is removed, slide the
gland back and forth to impact against the piston to
break it away from the “Locktite” sealant (see
below).
PISTON
GLAND