Manitowoc Published 10-01-12, Control # 044-05 4-35
777 OPERATOR’S MANUAL SET-UP AND INSTALLATION
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1. Remove lacing pinned to top chords of butt (View D), as
follows:
a. Support lacing so it cannot fall.
b. Remove keeper plates.
c. Remove nuts from tapered pins.
d. Carefully tap tapered pins up and out of tapered
sleeves. Be extremely careful to avoid damaging
threads on pins.
e. Remove tapered sleeves and remove lacing.
2. Support hydraulic motor with assist crane. The motor
weighs approximately 150 lb (68 kg).
3. Remove hydraulic motor from studs on auxiliary load
drum (View C). Store motor in a clean, protected area
free of dirt.
4. Remove drum encoder from support on auxiliary load
drum (View F). Store encoder in a clean, protected area
free of dirt.
5. Hook assist crane to lifting lugs on auxiliary load drum
(View C). The auxiliary drum weighs approximately
2,750 lb (1 247 kg).
6. Using assist crane, lift auxiliary load drum above boom
butt, and lower it through opening. Motor side of drum
must be on left side of butt.
7. Pin auxiliary load drum to lugs on each side of boom butt
(View F). Insert cotter pins.
8. Shift drum assembly as far to left as possible with assist
crane.
9. Remove side play by tightening setscrew to jack drum
frame to side (View F). Tighten jam nut to lock setscrew
in place.
10. Pin link to lugs on right side of boom butt and auxiliary
load drum (View E). Install cotter pins.
11. Pin turnbuckle rod ends to lugs on left side of boom butt
and auxiliary load drum (View B).
Adjust turnbuckle as required so holes in rod ends line
up with holes in lugs. Securely tighten jam nuts.
Install cotter pins.
12. Install hydraulic motor, as follows:
a. Be sure that O-ring is in place on hydraulic motor.
b. Lift motor into position with assist crane.
c. Slide hydraulic motor onto studs (View C) so motor
is positioned as shown with Port A facing UP.
d. Install lockwashers and nuts. Torque nuts to 180 ft lb
(244 N-m).
13. Install removable lacing, as follows (View D):
a. Slide ends of lacing into lugs on boom butt and align
holes.
b. Install tapered sleeves. Hole in sleeves must taper
down.
c. Install tapered pins.
d. Carefully tap tapered pins down into sleeves and
install nuts.
e. Alternate tapping pins down and tightening nuts
until lacing is securely fastened.
f. Install keeper plates.
14. Attach drum encoder to bracket on drum frame (View F).
Hydraulic and Electric Connections
See Figure 4-21 for following procedure.
1. Install clamp assemblies on boom butt (two places) for
hydraulic hoses and electric cable.
2. Fasten hydraulic hoses and electric cable to clamps.
3. Connect hydraulic hoses to couplers at right side of
boom butt (View A). Size and configuration of couplers
make it impossible to hook up hoses incorrectly.
4. Connect electric cable W2AUX to cable W2 at right side
of boom butt (View A).
Wire Rope Installation
See Load Line Reeving in this section for wire rope
installation procedures.
Butt Removal
If butt is removed with auxiliary load drum installed, hydraulic
hoses and electric cable must be disconnected from
couplers at right side of boom butt (Figure 4-21, View A).
CAUTION!
Parts Damage!
Hydraulic motor and drum encoder can be damaged
during drum installation. Remove both from drum
assembly before lifting drum into place.
CAUTION!
Parts Damage!
While lowering drum, be careful that drum does not bump
or damage chords or adjacent lacings.
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