Manitowoc Published 12-05-17, Control # 032-23 4-45
18000 OPERATOR MANUAL SET-UP AND INSTALLATION
See Figure 4-27 for the remaining steps.
17. Check that retaining pins (11, View H) are installed in
equalizer forks (12) so boom hoist equalizer cannot fall
off forks when step 21 is performed.
18. Attach lifting slings (3, View J) from assist crane to lifting
lugs (4) on mast top (6). Hoist so slings are just taut.
19. Remove pins (13, View L) and lift mast top clear of mast
butt.
20. Pay out wire rope from Drum 4 in mast butt while
performing step 21.
21. Lift mast top away from mast butt and place mast top on
blocking in front of mast butt. Allow adequate space for
assembling mast inserts as shown in View J.
Assemble Mast Inserts
See Figure 4-25 for the following procedure.
Four lifting lugs are located on top chords of both inserts (16
and 17). Use chain sling (3) to lift inserts.
1. Place insert (16) on blocking in front of mast butt.
Blocking must be at least 8 in (203 mm) high.
2. Attach insert (17, View J) to insert (16):
a. Lift insert (17) into position so fixed pins (14, View
M) in insert (17) engage hooked connectors (15) in
insert (16).
b. Lower insert (17) to align bottom connecting holes
and insert pins (13, View L).
NOTE On current production cranes, pins (13) are stored
in tubes on insert (View K).
c. Block under top end of insert (17).
d. For 140 ft (42,7 m) mast, repeat steps 2a–2c to
install second insert (17).
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