Manitowoc Published 08-12-19, Control # 224-13_v2 4-143
MLC650 OPERATOR MANUAL SET-UP AND INSTALLATION
Disconnecting Boom from 4M Insert
See Figure 4-109 for the following procedure:
1. Attach the live mast straps (5) to the 4M lugs using the
Manitowoc supplied shackles and slings.
2. Remove the bushings (6a) from the stored position and
place the bushings (6b) into the live mast straps.
3. Install the shackles (7) with the spreader sling (8)
between the live mast straps.
4. Connect the
SL 1 slings (9) to the SH 3 shackles (7).
5. Connect the
SL 1 slings (9) to the 4M insert using SH 3
shackles (10).
6. Boom up slightly to remove pressure from the lower
connecting pins (4).
7. Remove the safety pins (3), connect the hand-held pin
puller, and remove the lower connecting pins.
See "" on page 4-36
for more information.
8. Lower the boom onto the blocks and continue lowering
until the hooked connector (2) releases from the upper
fixed horizontal pin (1).
9. Slowly move the crane away from the boom and position
the crane, boom butt, and 4M in the desired disassembly
area.
10. Lower the boom butt and 4M onto blocking to disconnect
the live mast straps, shackles, and slings.
11. Remove the bushings (6b) from the live mast straps and
store the bushings (6a) on the 4M insert.
Deploying Self-Erect Cylinder
See Figure 4-110 for the following procedure:
1. Raise the live mast (1) to an approximately 85° angle
(2).
2. Extend the self-erect cylinder (3) to allow the pin (4) to
release from the retention bracket (5).
WARNING
Crushing Injury Hazard!
Stand outside the boom to prevent serious crushing injury,
do not stand inside the boom sections when removing the
connector pins.
Item Description
1Live Mast
2
85
° Angle
3 Self-Erect Cylinder
4Pin
5 Retention Bracket
FIGURE 4-110