sure that all packing traces are removed from the packing mounting surfaces.
d. Inspection and Repair.
(1) Replace the piston rod packing (19) and cylinder gaskets (4).
(2) Inspect the cylinder for cracks, twisting, warpage, dents, and broken or chipped mounting edges. If the
cylinder is defective or damaged, replace it.
(3) Check the piston rod for wear, twisting, etching, and damaged or corroded threads. Replace the piston rod
if it is bent, cracked, or damaged.
(4) Inspect the gland seat and swivel heads for cracks and breaks. Replace the heads if they are broken or
cracked, or if the machined mounting surfaces are badly corroded, etched, or chipped.
(5) Inspect both packing cups for frayed edges, wear, cuts, and damage. Replace defective packing cups.
Always allow the new packing cups to soak for 2 hours in hydraulic oil before installation.
(6) Check the mounting bearings for wear, scoring, pitting, and etching. Replace all defective bearings.
(7) Inspect all threaded surfaces for corroded, damaged, twisted, or stripped threads. Replace the draw studs if
they are bent or twisted, or if the threads are damaged or worn.
(8) Inspect the mounting pins for wear, out of round, pitting, corrosion, and damage. Replace defective
mounting pins.
e. Reassembly.
(1) Install the packing glands (2) on the piston rod (1).
(2) Slide the gland seat head (3) on the piston rod (1), making sure that the gland seat in the head is facing the
packing gland (2).
(3) Install the cylinder gasket (4) on the gland seat head (3).
(4) Place the packing cup (6) on the piston (7) with the cup lip away from the piston mounting surface.
(5) Install the packing cup retainer (5). Make sure that the mounting holes in the retainer and piston (7) are
properly alined.
(6) Install and tighten the packing cup retainer bolts (17). Thread the lock wire (16) through the holes in the bolt
heads and make sure that the wire is properly secured.
(7) Install the gasket (22) on the threaded end of the piston rod (1).
(8) Turn the piston (7) clockwise and install it on the piston rod (1). Make sure that the gasket (22) is seated in
the bevel on the piston (7). Tighten the piston securely.
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