16-18. BOOM HOIST CYLINDERS - REPAIR (Contd)
Slide gland (9) onto rod (8).
Lubricate piston (15) inner
diameter with clean hydraulic
oil. Install new O-ring (16)
inside bore of piston (15).
Install tube (17).
Use a cleaning solvent and lint
free rag to clean threads on rod
(8) and new nut (14).
Slide piston (15) onto rod (8).
Apply Loctite #271 on threads of
rod (8) and nut (14). Install
nut (14) on rod (8).
Place rod (8) and piston (15)
assembly on suitable supports to
prevent damage during assembly.
Install two wear rings (12) and
one new seal (13) on piston (15).
Position wear rings so that gaps
are 180 degrees apart.
Use care when installing rod (8) and
piston (15) assembly. Keep rod (8) in
line with cylinder tube (10) to prevent
binding. Failure to follow this
precaution will cause part damage.
Lubricate cylinder tube (10)
Tighten gland (9) onto cylinder
inner diameter, piston (15)
outside diameter and gland (9)
outside diameter with clean
Install backup rings (2 and 3),
Two backup rings (4) and three
new O-rings (5, 6 and 7) on
Position rod (8) and piston (15)
counterbalance valve (1).
assembly in cylinder tube (10).
Install counterbalance valve (1).
INSTALL BOOM HOIST CYLINDER,
Tighten gland (9) so that it is flush
with end of cylinder tube (10). Do not
overtighten gland (9).