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4
CYLINDERS
DISASSEMBLY AND ASSEMBLY
2. Install the dust seal (26).
• For a dust seal with a metal ring around its perim-
eter
, use a supporting metal (30) for installation.
3. Install the backup ring (22) and the O-rings (20) and
(21).
• Make sure that the cut portion of the backup ring
does not get out of place.
Retainer
<Swing cylinder>
1. Install the cushion seal (5), spacer (4) and stopper (3)
on the retainer.
2. Install the backup ring (2) and the O-ring (1) on the re-
tainer
.
Holder
<Boom cylinder, arm cylinder>
1. Install the spacer (5) and the cushion seal (4), and then
press fit the collar (3).
2. Install the backup ring (2) and the O-ring (1).
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