TM 5-3895-373-34
2.70
REPAIR SCREED LIFT CYLINDER - Continued.
E.
ASSEMBLE - Continued.
3.
REASSEMBLE PISTON COMPONENTS.
Do not clamp chrome surface of piston rod in
bench vise. Damage to chrome surface of
piston rod can result.
a.
Clamp head end of piston rod (3) in bench
vise.
Internal seals and preformed packings are
distorted during installation. Allow one hour
for seals and preformed packings to resume
original shape after installing cylinder head
and piston on piston rod.
Hydraulic oil can be moderately flammable
and can be an irritant to the skin, eyes, and
respiratory
system.
Avoid
prolonged
exposure. Eye protection and rubber gloves
must be worn when working with hydraulic
oil.
b.
Relubricate piston rod (3), cylinder head (1),
and piston (6) with clean hydraulic oil.
Be careful not to damage preformed packing
when sliding over threads. Sharp edges of
thread
can
cut
or
damage
preformed
packing. Damaged preformed packing will
cause leakage and affect performance.
c.
Carefully rotate and slide seal end of
cylinder head (1) onto piston rod (3).
d.
Install preformed packing (7) in packing
groove of piston rod (3).
e.
Carefully rotate and slide flush face of
piston (6) onto piston rod (3). Ensure
concave end of piston is facing outward.
f.
Install self-locking hex nut (5) onto threaded
end of rod. Using socket wrench adapter,
tighten hex nut to 200 lb-ft (271 N•m).
g.
Remove piston rod (3) from bench vise.
Allow one hour for installed seals and
packings to resume their original shape.
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