Manitowoc 777 User Manual

Reference Only
Manitowoc Published 10-01-12, Control # 044-05 v2 3-23
777 OPERATOR’S MANUAL OPERATING CONTROLS AND PROCEDURES
3
Luffing Jib Max Up 1 Limit
Crane S/N 7771156 and Newer
This is a programmed limit which automatically stops the
luffing hoist when the boom to luffing jib angle is 168°.
The limit bypass switch must be turned to the bypass
position to allow the jib to be raised an additional 3° to the
LUFFING JIB MAX UP 2 limit.
The luffing jib can be lowered after this limit is contacted.
Luffing Jib Max Up 2 Limit
Crane S/N 7771156 and Newer
This is a limit switch which automatically stops the luffing
hoist when the boom to luffing jib angle is 171°.
For non-CE cranes, this limit can be bypassed only when the
attachment is lowered to the ground (boom below 50°) and
the
handle is returned to neutral while holding the bypass switch
in the bypass position.
For CE cranes, the luffing jib cannot be lowered after the Jib
Maximum Up 2 limit is contacted until the limit switch is reset.
When the limit is contacted, the following screen will appear
on the digital display.
Once the screen appears, confirm it to reset the limit switch.
The luffing jib can then be lowered.
Luffing Jib Max Down Limit
Prior to Crane S/N 7771156
Automatically stops the luffing jib when the boom to luffing jib
angle is 60°.
The luffing jib can be raised after the limit is contacted.
Luffing Jib Max Down 1 Limit
Crane S/N 7771156 and Newer
This is a programmed limit which automatically stops the
luffing hoist when the boom to luffing jib angle is 60°.
The luffing jib can be raised after this limit is contacted.
Luffing Jib Max Down 2 Limit
Crane S/N 7771156 and Newer
This is a limit switch which automatically stops the luffing
hoist when the boom to luffing jib angle is 57°.
This limit can be bypassed for non-CE cranes.
For CE cranes, the luffing jib cannot be raised after jib
maximum down 2 limit is contacted until the limit switch is
reset. When the limit is contacted, the following screen will
appear on the digital display.
Once the screen appears, confirm it to reset the limit switch.
The luffing jib can then be raised.
WARNING
Falling Boom/Jib Hazard!
Do not raise luffing jib above up limit during normal
operation. Structural damage will occur, possibly causing
boom and luffing jib to be pulled over backwards.
WARNING
Falling Boom/Jib Hazard!
Proceed slowly when operating the luffing jib above the
Max Up 1 limit.
Do not raise luffing jib above Max Up 2 limit. Structural
damage will occur, possibly causing boom and luffing jib
to be pulled over backwards.
LUFFING JIB MAX UP 2
CONFIRM TO RESET
WARNING
Falling Boom/Jib Hazard!
Do not lower luffing jib below down limit. Structural
damage will result, possibly causing boom and luffing jib
to collapse.
WARNING
Falling Boom/Jib Hazard!
Do not lower luffing jib below minimum angle given in
Luffing Jib Raising Procedure in Capacity Chart Manual.
Structural damage can result, possibly causing boom and
luffing jib to collapse.
LUFFING JIB MAX DN 2
CONFIRM TO RESET

Manitowoc 777 Specifications

General

Brand	Manitowoc
Model	777
Category	Construction Equipment
Language	English