Malfunctions during crane operation
14.2 What to do when malfunctions occur during crane operation
14 - 2 3 302 819 en Operating manual
GMK3060
13.12.2018
14.2 What to do when malfunctions occur during crane
operation
If a malfunction occurs:
• Keep calm!
The load can be
set down
• Set down the load. Retract the main boom completely and set it down on the
main boom rest.
If it becomes necessary to override the RCL, observe all the information in the
section titled RCL override;
à RCL override – version A, p. 11 - 67.
à RCL override – version B, p. 11 - 71
If it is no longer possible to operate the crane from the crane cab, you can use
the emergency activation, if necessary;
à Emergency operation with the hand-held control, p. 14 - 43,
à Hydraulic emergency operation with the hand pump, p. 14 - 51,
à Hydraulic emergency operation as per DGUV, p. 14 - 57.
• Lock the truck crane to prevent unauthorised use. Remove the ignition key and
lock away the hand-held control.
• Inform your supervisor.
• Try to eliminate the malfunction. Notify Manitowoc Crane Care if you cannot
correct the malfunction.
Load cannot be
set down
• Secure the danger area using cordons and warning signs.
• Notify Manitowoc Crane Care.
G
Risk of accidents when carrying out repairs with loads lifted!
Repairs must not be carried out as long as a load is lifted.
Always try to lower the load before carrying out repairs.
Only properly qualified personnel may perform crane movements with the
solenoid valves.
G
Risk of accidents due to overridden or faulty RCL!
You may override the RCL only if it becomes absolutely necessary to do so in
the event of an emergency. This is to put the truck crane into a safe state in the
event of a malfunction. In this case, do not perform any movements that would
increase the load moment.
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