Manitowoc Grove GMK 4100L-1, Operating Manual

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Malfunctions during crane operation
14.5 Emergency operations and programs
14 - 36 3 302 690 en Operating manual
GMK4100L-1
2
3
.1
1.
201
7
Status 2 – Telescoping cylinder moving with telescopic section
•
For the current telescopic section, note down the value for the locking
point at 0%;
à
p. 14 - 41.
•
Telescope the telescopic section to the lock-
ing point at 0% – check on the length indica-
tor (
1 ) or ( 2 ).
•
Select and confirm the symbol ( 3 ) for
locking.
•
Check that the symbol ( 4 ) is displayed.
If the symbol ( 4 ) is displayed, you can operate
the emergency program;
à
p. 14 - 38.
If the symbol ( 3 ) is still displayed, the emer-
gency program will be disabled. Contact
Manitowoc Crane Care
.
Status 3 – Telescoping cylinder on return run (without telescopic section)
In this status, you should first check the functioning of the display for Shortly
after the locking point and then check the functioning of the emergency
program.
•
For the next telescopic section to be retracted, note down the value for the
locking point of the telescoping cylinder;
à
p. 14 - 41.
– Checking display for
Shortly after the locking point
In the next step, start by extending the telescoping cylinder no further
than the locking point.
S
Risk of damage from faulty proximity switch!
To start with, move no further than the locking point and carry out the check
described in this section. If the proximity switch for the display
Shortly after
the locking point
is faulty, there will be no automatic shutdown and you could
move the telescoping cylinder too far and damage the boom system – espe-
cially when moving into the foot section of telescopic section
VI
.