Palfinger PC 3800, Operating Manual, Page: 94 / 158

Crane operation
Lowering the load
Caution!
In cranes without overload protection system, the load
lowers uncontrollably when the permissible load moment is exceeded.
Refer to chapter 5, 'Capacity indicator'.
Don't increase the outreach when lowering the load.
If you increase the outreach when lowering the load, the load may lower uncontrollably.
Monitor the capacity indicator.
Landing the load
•
The landing area must be free of obstacles.
•
Don't land the load on ice or snow.
•
Don't land the load on drop offs, bumps, slopes, holes, ditches, etc.
•
Land the load only on solid level ground; if necessary use suitable blocks or boards.
•
When the load is put down, the load on the main boom must not be relieved suddenly.
Warning!
If the load on the main boom is relieved suddenly, bulk
materials are emptied quickly (grab application) or the load is put
down quickly with the cable winch, the main boom may snap upwards.
Always put loads down slowly.
•
Before detaching the load handling attachment make sure the load sits properly and stable.
Work interruptions
If it is necessary to leave the crane unattended:
•
Land the load.
•
Put down the load arm properly.
•
Turn off the crane.
•
Secure the crane against unauthorized use.
Resuming work
•
If crane has been left unattended, check whether the crane has been tampered with before
resuming crane operation. Ensure secure crane operation.
If the crane has been tampered with by unauthorized persons:
•
(Refer to chapter 7 'Preparing for crane operation'). Carry out all function checks described in
chapter 7.
In devices with remote control it is additionally necessary to:
•
check that the appropriate device control panel (control handset) is used (as indicated) before
resuming crane operation.
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