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5. CHAIN
1)
CHAIN SHEAVE
(1)
Place a sling around carriage and attach
to an overhead hoist. Lift carriage high
enough so that the tension on the chain
over sheaves is relieved after the carriage
is blocked. Position wooden blocks under
the carriage and lower it.
(2)
Remove the split pin securing the chain
anchor pins and discard.
supporting the chains, remove the chain
anchor pins and drape the chain over the
carriage.
(3)
Remove retaining ring securing sheaves
to sheave support. Remove sheaves with
bearings.
(4)
Remove bearing retaining ring from
sheave and press bearings from sheaves.
(5)
Thoroughly clean, inspect and replace all
worn or damaged parts.
(6)
Reverse the above to assemble and
install. Use new split pins in chain anchor
pins.
REAR CHAIN SHEAVE(TF MAST)
2)
Raise and securely block carriage and
(1)
inner mast section.
Remove the split pin securing the chain
(2)
anchor pins and discard.
(3)
Remove chains.
Remove retaining ring securing chain
(4)
sheaves to sheave support. Pry off
sheaves with bearings.
(5)
Remove bearing retaining ring from
sheave and press bearings from sheaves.
Thoroughly clean, inspect and replace all
(6)
worn or damaged parts.
Reverse the above procedure to
(7)
assemble and install. Use new split pins
in chain anchor pins.
Sheave
Inner mast
While
A,B
Chain & sheave
mounting point
Inner mast
Carriage
8-14
Chain
Outer mast
110D7EMS15
Middle mast
B
A
Outer mast
110D7EMS16
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