SET-UP AND INSTALLATION MLC650 OPERATOR MANUAL
4-38
Published 08-12-19, Control # 224-13_v2
Install the Live Mast
See Figure 4-31 for the following procedure:
1. Position the trailer carrying the live mast at the desired
location at the assembly site.
2. Remove all chains and straps used to secure the live
mast to the trailer.
3. Using an assist crane, attach 4 - SL 6 lifting slings (2) to
the live mast lift points (1) using 4 - SH 2 shackles (3), lift
the live mast from the trailer and remove the trailer.
NOTE: As the mast assembly is lifted, it will tilt forward
approximately 4° (View B).
4. Open the live mast hinge keepers (5a) on the rotating
bed to allow the live mast hinge (6) to engage (View A)
the rotating bed pockets.
5. Move the four backhitch/gantry operating pins (8,
Figure 4-32
) into the handling positions.
NOTE: Ensure that the gantry pin retention bracket
(9a, Figure 4-33
) is assembled in the mast
assembly position, prior to lifting the mast to
prevent the operating pin (8, Figure 4-33
) from
falling.
6. Remove the two keeper pins or plates (10a or 10b,
Figure 4-32
).
7. Install the pin puller cage (12, Figure 4-32
) and
disengage the two hoist drum operating pins (11) using
the hand-held pin puller.
See "Connect Hand-Held Pin Puller" on page 4-37
for
information on using the pin puller.
8. Lower the mast into position onto the rotating bed.
The live mast hinge will align first.
9. Once the live mast hinge is engaged in the rotating bed
pockets, secure the mast to the rotating bed by closing
the live mast keepers (5b, View C Figure 4-31
) and
inserting the pins and hair-pin cotter (4, View C
Figure 4-31
).
View A
View C
View B
(4)
(4)
FIGURE 4-31
Item Description
1 Live Mast Lifting Points
24-SL 4 - Slings - 3,8 m (12.50 ft) -
11 340 kg (25,000 lb)
34-SH 2 - Shackles -17 t (18.70 USt)
4 Pin and Hair-Pin Cotter
5a Live Mast Keepers (open)
5b Live Mast Keepers (closed)
6 Live Mast Hinge
7 Backhitch/Gantry Assembly
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