Manitowoc MAX-ER 16000 - Lower Fixed Mast Using Assist Crane as Hold-Back

Reference Only
Manitowoc Published 04-17-17, Control # 067-11 4-75
16000 HANGING MAX-ER® OPERATOR MANUAL SET-UP AND INSTALLATION
4
Lower Fixed Mast Using Assist Crane as Hold-Back
Circled numbers in Figure 4-36 match the following steps.
1. Position crane on a firm, level surface.
2. Lower boom onto foundation (View A) and remove boom
(see procedure in this section).
3. Select MAX-ER Mast Configuration on RCL.
4. Make sure mast hoist and boom hoist wire rope is
spooled properly on drums.
5. Connect a 50 ft (15 m) long tagline to end of each
counterweight strap.
6. Attach assist crane to boom hoist equalizer (View C):
a. Attach slings to lifting holes in equalizer.
b. Securely attach wire rope slings between equalizer
and rotating bed or carbody of assist crane.
7. Park assist crane so equalizer is at Dimension A from
end of crawlers (see View B, and Table 4-2
). Equalizer
must be centered with relation to mast to prevent
side loading mast.
Assist crane must provide specified hold-back
forces (B and C, View B and Table 4-2
).
8. Slowly haul in boom hoist wire rope and pay out mast
hoist wire rope to raise mast toward vertical.
NOTE Using taglines, guide counterweight straps clear of
live mast and mast stops as fixed mast rises.
9. As mast nears vertical, tighten mast hoist wire rope as
required so mast moves smoothly forward past vertical.
10. Continue to lower 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 paid out.
11. Stop lowering mast when bottom connectors between
mast insert and mast top are approximately 3-1/2 ft (1,1
m) from ground.
Place 3 ft (0,9 m) of blocking under bottom connectors
between mast insert and mast top. Lower mast onto
blocking.
12. Remove boom hoist equalizer retaining pins from mast
top pockets (View E).
13. Using assist crane, lift boom hoist equalizer into position
on forks at end of mast top (View F) and install retaining
pins.
14. Disconnect assist crane from equalizer.
15. Raise live mast arms using crane set-up remote control.
CAUTION
Wire Rope Damage!
Boom hoist equalizer will tip if it is not properly supported,
possibly resulting in damage to wire rope. Support boom
hoist equalizer properly while lowering mast.