Manitowoc 18000 Operator's Manual page 213

18000 OPERATOR MANUAL
Lower Mast
Circled numbers in Figure 4-33
1. Position crane on a firm, level surface.
2. Start crane engine and select/confirm SETUP mode.
3. Make sure mast hoist and boom hoist wire rope is
spooled properly onto drums.
4. Lower boom to ground.
5. If an assist crane will be used as the holdback, remove
boom from crane.
6. If an assist crane will be used as the holdback, attach
assist crane to boom hoist equalizer (View B):
a. Attach 4-leg chain sling to lifting holes in equalizer.
b. Securely attach wire rope slings between equalizer
and rotating bed or carbody of assist crane.
CAUTION
Wire Rope Damage!
Boom hoist equalizer will tip if it is not properly supported,
possibly resulting in damage to wire rope.
hoist equalizer properly while lowering mast.
c. Park assist crane so equalizer is at Dimension A
from end of crawlers (see View C, and
Equalizer must be centered with relation to mast
to prevent side loading mast.
Assist crane must provide specified holdback
forces (B and C, View C and
7. Select SETUP mode and confirm.
WARNING
Moving Equipment!
Mast straps will swing away from rotating bed when
unpinned. Stand to side when removing pins. Do not allow
links to contact hand rails on rear of crane.
8. Unpin live mast straps from rear of rotating bed (View
G). If necessary, boom up slightly to remove loading on
pins. Store pins and keeper plates with straps.
9. Slowly haul in boom hoist wire rope and pay out mast
hoist wire rope to raise mast toward vertical.
Manitowoc
match the following steps.
Support boom
Table 4-4).
Table 4-4).
Published 12-05-17, Control # 032-23
10. As mast nears vertical, tighten mast hoist wire rope as
required so mast moves smoothly forward past vertical.
11. Continue to lower live mast by slowly paying out mast
hoist wire rope and hauling in boom hoist wire rope.
Keep boom hoist rope as slack as possible to prevent
boom hoist wire rope from bearing against rope
guard in mast top (View H).
12. If boom is being used as the holdback, proceed as
follows:
a. Stop lowering mast when it is at 65°.
When fixed mast is at 65°, live mast will be at
approximately 53°. The live mast angle can be
monitored on the display in the cab.
b. Turn on drum park for Drums 4 and 5.
c. Place boom hoist equalizer on ground to side of
boom assembly area and disconnect assist crane.
Take every precaution to protect wire rope from
damage.
Do not allow wire rope to jump off sheaves (in
mast and equalizer) or otherwise become
fouled.
d. Completely remove jib and boom.
e. Perform steps 6a through 6c.
13. Continue to lower live mast by slowly paying out mast
hoist wire rope and hauling in boom hoist wire rope.
NOTE Operator shall match rate of speed at which boom
hoist wire rope is hauled in with rate of speed at
which mast hoist wire rope is payed out.
14. Stop lowering mast when bottom connectors between
40 ft (12,2 m) mast insert and mast top are
approximately 3-1/2 ft (1,1 m) off ground.
15. Install blocking under top end of 40 ft (12,2 m) insert
(View F). Lower mast onto blocking.
16. Remove boom hoist equalizer retaining pins from mast
top lugs (View D).
17. Using assist crane, lift boom hoist equalizer into position
on forks at end of mast top (View E) and install retaining
pins.
18. Disconnect assist crane from equalizer.
SET-UP AND INSTALLATION
4-61
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