Manitowoc GROVE RT890E Operator's Manual page 105

RT890E
15. Place hoist rope on all deflection sheaves and the head
sheave of the 23 ft (7 m) section.
16. Move the lifting limit switch from the head of the main
boom to the head of the 33 ft (10.1 m) section.
17. Reeve the hoist cable on the hook block.
18. Attach the lifting limit switch weight and guide hoist rope
through the weight.
NOTE: Operation with the boom extension is carried out in
the same way as for the lattice extension.
Raising the boom;
Unrigging the 72/89 Ft (22/27.1 m) Boom
Extension
Prerequisites
-
-
1. Prepare the crane for unrigging.
2. Fully retract and set down the main boom.
3. Remove the lifting limit switch weight and move lifting
limit switch from the head of the 23 ft (7 m) section to the
head of the main boom.
4. Unreeve the hoist cable from the hook block and remove
it from the lattice extension.
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5. Raise the main boom completely.
SET-UP AND INSTALLATION
Telescoping;
The crane is on outriggers or the main boom is
placed on the boom support.
An auxiliary crane is available.
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