Manitowoc Published 08-06-19, Control # 237-09_v2 4-43
MLC165-1 OPERATOR MANUAL SETUP AND INSTALLATION
Attached Boom Butt to Crane
See Figure 4-36.
NOTE To prevent the crane from tipping, some boom and
jib lengths must be raised and lowered over
blocked crawlers. See the appropriate boom or jib
capacity chart for blocked crawler requirements
and the Crawler Blocking Diagram in the Capacity
Chart Manual for instructions.
1. Start the engine.
2. If required, travel the front crawler rollers onto blocking
(7, View A) as instructed in the Crawler Blocking
Diagram in the Capacity Chart Manual.
3. Remove the locking pins (2W, View B) from the boom
hinge pins (3) and store them in the storage lugs (4).
4. Using the switch on the overhead control console or on
the remote control, fully disengage the boom hinge pins
(3, View B).
5. Move the guide pins (5, View B) from the storage holes
(5S) and install them in the assembly holes (5A).
The guide pins aid in aligning the boom butt connecting
holes.
6.
Apply a light coat of grease to the flat on the underside of
both boom hinge lugs
.
7. Attach a 4-leg chain sling — or shackles and synthetic
slings — from the assist crane to the four lifting lugs on
the boom butt (1, View D).
8. Lift the boom butt into position until the stops on the
underside of the boom hinge lugs are snug against the
guide pins (5, View C).
9. Raise the boom butt until the holes in the boom butt are
aligned with the holes in the rotating bed.
10. Install the shims (8, View C) on the inboard side of both
boom hinge legs. Shims must be installed to prevent
the butt from contacting outboard rotating bed lugs.
11. Using the switch on the overhead control console or on
the remote control, fully engage the boom hinge pins (3,
View A).
12. Raise the boom butt slightly and move the guide pins (5,
View C) from the assembly holes (5A, View B) to the
storage holes (5S). Do not lower the boom butt to the
ground until the guide pins are stored.
13. Install the locking pins (2, View B) in the boom hinge pins
(3).
14. Lower the boom butt onto blocking at least 9 in (229 mm)
high at ground level.
DANGER
Tipping Hazard!
Do not attempt to raise or lower the boom or the boom
and jib from or to the ground until the crawlers are
blocked, if required. Otherwise, the crane will tip.
WARNING
Crush Hazard!
Avoid injury when engaging the boom hinge pins:
Keep your fingers out of the space between the boom butt
lugs and rotating bed lugs. The boom butt may move from
side-to-side when the pins are engaged.
Keep your fingers away from the underside of the hinge
pin cylinder housings. Alignment lugs move when the pins
are engaged.
WARNING
Falling Boom Hazard!
Prevent the boom butt (or boom) from falling off the crane:
• Do not operate the crane until the locking pins are
installed in the boom hinge pins.