Manitowoc Published 11-20-19, Control # 234-19 4-93
MLC300 OPERATOR MANUAL SETUP AND INSTALLATION
Install/Remove Lower Boom Point
See Figure 4-66 for the following procedure.
If removed, install the lower boom point as follows.
If required per the Capacity Chart, it may be necessary to
remove the lower boom point for some boom and luffing jib
combinations.
Installing Lower Boom Point
1. Attach owner furnished lifting slings to the lifting rings (4,
View D) on the lower boom point (2).
2. Remove the pins (5, View B) and pins (6, View C) from
the lugs on the lower boom point (2).
3. Lift the lower boom point (2, View A) into position on the
boom top so the upper pin holes (View B) and the lower
pin holes (View C) are aligned.
4. Install the pins (5, View B) and the pins (6, View C).
Removing Lower Boom Point
Reverse the installation steps to remove the lower boom
point.
Remove/Install Lower Boom Point Sheaves
Removing Lower Boom Point Sheave Clusters
See Figure 4-66 View E, for the following procedure.
1. Remove the rope guard (8).
2. Remove the shaft (9).
3. Using appropriate lifting equipment, pull the sheave
clusters (3) out of their saddles in the lower boom point.
Each sheave cluster weighs approximately 240 kg (530
lb).
4. Keep the shims (10) that come out with the sheave
clusters.
5. Reinstall the shaft (9) with the flat washer and lock nut.
Securely tighten the lock nut.
6. Reinstall the rope guard (8).
Installing Lower Boom Point Sheave Clusters
Reverse the removal steps to install the lower boom point
sheave clusters.
Install shims (10) on both sides of each sheave cluster to
limit side play of each sheave cluster to 0,76 mm (1/32 in).
WARNING
Crane Tipping Hazard!
To raise some boom and luffing jib lengths, the two outer
lower boom point sheave clusters must be removed. The
crane will tip if this is not done.
Refer to the appropriate Liftcrane Luffing Jib Capacity
Chart to determine the lower boom point sheave
requirements and deducts.
To Next Page
Loading...
Need help?
General
