Manitowoc 777 User Manual

Reference Only
Manitowoc Published 10-01-12, Control # 044-05 v2 3-19
777 OPERATOR’S MANUAL OPERATING CONTROLS AND PROCEDURES
3
Move handle to REAR to RAISE load (or luffing jib on rear
drum).
H4. Front Drum Park Switch
H5. Rear Drum Park Switch
H6. Auxiliary Drum Park Switch
Drum park switches enable and disable drum operation. With
drum park on, corresponding drum handle is inoperable and
brakes are applied.
Press TOP of rocker to TURN ON corresponding drum park.
Press BOTTOM of rocker to TURN OFF corresponding drum
park (allow drum to be operated).
H7. Front Drum Pawl Switch
H8. Rear Drum Pawl Switch
H9. Auxiliary Drum Pawl Switch
Ratchet and pawl provides a positive means of locking
corresponding drum in position when not in use.
Press TOP of rocker to ENGAGE pawl with ratchet.
Press BOTTOM of rocker to DISENGAGE pawl from ratchet.
NOTE: A drum will not operate in lower direction until
corresponding pawl is disengaged.
The corresponding drum will stop lowering if pawl
is engaged while lowering a load.
FIGURE 3-8
OFF OFF
OFF OFF
A794
LIFTCRANE
Lower
Load
Lower
Load
Lower
Luffing Jib
OR
Rear
Drum
Front
Drum
OR
Raise
Load
Raise
Load
Raise
Luffing Jib
CLAMSHELL
Open
Bucket
Lower
Bucket
Rear
Drum
Front
Drum
Close
Bucket
Raise
Bucket
CAUTION
Machinery Damage!
Do not engage drum pawl while lowering a load. Damage
to pawl or drum may result.
Bring drum to a complete stop and then engage drum
pawl.

Manitowoc 777 Specifications

General

Brand	Manitowoc
Model	777
Category	Construction Equipment
Language	English