Rigging work
12.8 Rigging the auxiliary hoist
12 - 108 3 112 993 en Operating manual GMK 6400
12.07.2013
Alternating
operation with
the main and the
auxiliary hoist
For equipment having a second head sheave (1) on the main boom, you can
simultaneously reeve the main and auxiliary hoist ropes and alternately
work with both hoists. To do this, you must install the second lifting limit
switch.
• Install both lifting limit switches and the associated lifting limit switch
weights;
à Installing the lifting limit switch, p. 12 - 126.
• Enter the current reeving for both hoists at the RCL; à Entering the reeving
value
, p. 11 - 29.
• Switch on the hoist with which you wish to lift the load; à Hoists display,
p. 11 - 32.
The correct hoist is now set on the RCL and crane operation is secured by
the RCL. The maximum loads are reduced by the value of the weight of the
second hook block.
G
Risk of accident during two-hook operation
During alternating operation the load must always hang on only one hook
block. If you sling the load on both hook blocks but lift it with only one of
the blocks, you are already in the non-permissible two-hook mode which is
no longer secured by the RCL.
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