Manitowoc 777 User Manual

Reference Only
SET-UP AND INSTALLATION 777 OPERATOR’S MANUAL
4-18 Published 10-01-12, Control # 044-05
4. Raise mast (boom up) until upper wire rope guide is fully
raised. Pin upper wire rope guide to lower wire rope
guide (Figure 4-11, View B).
NOTE: Install rope guide bar in proper holes as shown in
Figure 4-11, View B.
5. Position crane so boom butt is in-line with boom
(Figure 4-12, View A).
6. Travel forward slowly, swing, and boom up and down as
required to align fixed vertical pins in butt with top
connector holes in insert (Figure 4-12, View B).
.
7. Check appropriate capacity chart to see if crawlers must
be blocked to raise boom. If so, proceed as follows:
a. Mark ground at center of both front rollers or rear
tumblers, depending on which end is closer to
boom.
See Crawler Blocking Diagram in Capacity Chart
Manual for blocking requirements.
b. Lower boom to disengage top connecting pins.
c. Slowly travel several feet in reverse.
d. Place required blocking on ground at points marked
in step 7a (Figure 4-12, View A).
e. Repeat step 6 while traveling onto blocking.
8. Slowly boom up only enough to align bottom connector
holes in butt with bottom connector holes in insert
(Figure 4-12, View C).
9. Install bottom connector pins (Figure 4-12, View C)
10. Boom down enough to slacken rigging pendants
(Figure 4-12, View E).
11. Unpin rigging pendants from upper wire rope guide.
12. Pin rigging pendants to lugs on mast for storage
(Figure 4-12, View F).
13. Lower mast enough to gain access to pendant links on
end of mast.
14. Connect boom pendants to pendant links (Figure 4-12,
View G).
15. Finish assembling boom and jib:
• Reeve load lines to load block and/or weight ball.
• Check that all electrical cords are connected to
boom.
• Perform pre-raising checks.
16. Connect electric cord from crane to boom:
a. Disconnect boom electrical cord (Figure 4-3, View
B) from boom junction box on rotating bed.
b. Connect boom electrical cable to cable reel on
boom butt.
WARNING
Tipping Hazard!
Prevent crane from tipping:
• Block crawlers if required per capacity chart before
attempting to raise boom.
WARNING
Moving Part Hazard!
Prevent serious crushing injury:
• Do not stand inside boom while installing connector
pins — STAND OUTSIDE BOOM.
A985
View A
P445
Pin
Upper
Wire Rope
Guide
Pin
View B
Upper
Wire Rope
Guide
Lower
Wire Rope
Guide
Operating
Position
Assembly
Position
P521
Install Bar
Here for
Operation
FIGURE 4-11

Manitowoc 777 Specifications

General

Brand	Manitowoc
Model	777
Category	Construction Equipment
Language	English