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2)
ELEVATING MAST
(1)
Inner and middle mast(TF mast)
After completing all necessary steps for load rollers and back up liner removal. Remove rear
chains and sheave support if not already done.
Disconnect free lift cylinder hose. Drain hose into a suitable pan or container and cap hose.
While supporting free lift cylinder assembly, remove bolts and washers securing cylinder to mast
crossmember.
Place a sling around free lift cylinder and attach to an overhead hoist. Slowly raise and move
cylinder to one side.
Attach chains or sling to the inner mast section at top crossmember. Using an overhead hoist
slowly raise the upright straight up and out of middle mast section.
Attach chains or sling to the middle mast section at top crossmember. Using an overhead hoist
slowly raise the upright straight up and out of outer mast section.
Replace upright and reverse above procedure to install. Make all necessary measurements and
adjustments.
3)
C
C
HAIN
(1)
Rear chain sheave(TF mast)
Raise and secure block under platform
and inner mast section.
Remove the split pin securing the chain
anchor pins and discard.
supporting the chains, remove the chain
anchor pins from outer mast section.
Remove chains.
Remove retaining ring securing chain
sheaves to sheave support. Pry off
sheaves with bearings.
Remove bearing retaining ring from
sheave and press bearings from
sheaves.
Thoroughly clean, inspect and replace all
worn or damaged parts.
Reverse the above procedure to
assemble and install. Use new split pins
in chain anchor pins.
While
Platform
8-11
4
3
Free lift
cylinder
2
1
10BOP7MS18
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