Manitowoc 777 User Manual

Reference Only
Manitowoc Published 10-01-12, Control # 044-05 4-47
777 OPERATOR’S MANUAL SET-UP AND INSTALLATION
4
Install Intermediate Suspension
See Figure 4-29 for following procedure.
Intermediate suspension is required for booms 190 – 270 ft
(57.9 – 82.3 m) in length. See Table 4-3 for intermediate
suspension strut and pendant positions.
If intermediate suspension is necessary, install the
suspension strut and connect the pendants to the strut
before connecting the boom to the boom butt.
Table 4-3
Intermediate Suspension Requirements
1. Determine correct positioning of intermediate
suspension on boom insert. See Table 4-3 and
Figure 4-29 for positioning.
2. Install strut supports between bottom lacings of two
inserts at point where intermediate suspension will be
installed (View C).
3. Remove pins connecting four latches to suspension
beam (Views B and F).
4. Lift intermediate suspension into position over FACT
connectors between required boom insert (View A).
5. Engage outside latches on suspension beam and pin
latches in position (View B).
6. Lower strut onto strut supports (View C).
Install Pendants
1. Pin basic pendants to pendant links (Figure 4-28,
View D).
2. Stretch basic pendants tightly along top of boom.
3. Pin remaining pendants in proper sequence to basic
pendants (Figure 4-28, View B and Figure 4-31). Install
pendant connecting pins so heads face each other.
4. Stretch pendants tightly along top of boom as assembly
progresses. Make sure pendants are not crossed.
5. If equipped with intermediate suspension, attach
pendants at holes in position B or C on strut (see Table
4-3 and Figure 4-29, View D):
a. Align pendants on either side of proper hole in strut.
b. Install connecting pin through pendant connectors
and hole in strut.
c. Install collars and retaining pins on both ends of
connecting pin.
6. Make sure pendants are not hooked under lifting lugs
(Figure 4-24, View A).
Install Upper Boom Point
If required, install upper boom point as follows:
1. Lift upper boom point into position at end of boom top
(Figure 4-28).
2. Align upper connecting holes at A and install connecting
pins and snap pins. Do not pin lower holes. This will
allow upper boom point to rest on blocking (Figure 4-28,
View C).
3. Install lower connecting pins and snap pins at holes B
after upper boom point is clear of ground (Figure 4-28,
View C).
Boom Length
Assembly
Location
A (Figure 4-29)
Pendant
Position on Strut
190 ft (57.9 m) 77.5 ft (23.6 m) C
200 ft (61.0 m) 77.5 ft (23.6 m) C
210 ft (64.0 m) 117.5 ft (35.8 m) B
220 ft (67.1 m) 117.5 ft (35.8 m) B
230 ft (70.1 m) 117.5 ft (35.8 m) B
240 ft (73.2 m) 117.5 ft (35.8 m) C
250 ft (76.2 m) 117.5 ft (35.8 m) C
260 ft (79.2 m) 117.5 ft (35.8 m) C
270 ft (82.3 m) 137.5 ft (41.9 m) B
WARNING
Falling Boom Hazard!
Starting at butt end of boom, pendants must be installed in
same sequence as inserts (shortest inserts and pendants
nearest butt).
Pendants are furnished in matched sets of four and must
be installed in matched sets — two pendants on one side
of insert must match two pendants on opposite side of
insert.
Failing to comply with these precautions can result in
severe side loading of boom and mast. Structural damage
to boom and mast could occur, possibly causing boom to
collapse.

Manitowoc 777 Specifications

General

Brand	Manitowoc
Model	777
Category	Construction Equipment
Language	English