Heavy load lattice extension
6.3 Operation with the heavy load lattice extension
6 - 18 3 112 441 en Lattice extension operating instructions
GMK 4100/4100-L/5095
11.01.2008
– The current rigging mode with the rigged heavy load lattice extension is
entered on the SLI, and the corresponding SLI code is displayed as per the
Lifting capacity table.
– The current reeving type on the heavy load lattice extension is entered for
the hoisting gear whose hoist rope is reeved on the heavy load lattice
extension.
– Apart from the hook block, there is no load on the lattice extension.
– The main boom is fully retracted.
When all of the above prerequisites have been fulfilled, the SLI will automat-
ically switch to the rigging tables and derricking can then be done in the
angle range underneath the working range of approx. 15°.
6.3.3 Telescoping with rigged heavy load lattice extension
Telescoping will only be enabled by the SLI if the main boom is derricked to
a certain angle and a maximum permissible load is not exceeded.
The required angle (between 70° and 80°) depends on the rigging mode of
the truck crane.
You will find the required main boom angle and maximum permissible load
(weight of the hook block) in the
Lifting capacity tables, in the Chapter Rigging
tables – Heavy load lattice extension
.
If the main boom angle is too small for telescoping with the heavy load lat-
tice extension, the SLI displays a appropriate error message.
6.3.4 information about the SLI shutdown
The operation with the heavy load lattice extension is monitored by the SLI.
When operating with the lattice extension, SLI shutdowns may occur for the
same reasons as when operating with the main boom;
à Operating instruc-
tions
of the truck crane.
S
Risk of overloading the main boom
If you are telescoping the main boom with the rigged heavy load lattice
extension, you may not simultaneously slew the superstructure.
This prevents the main boom being subjected to additional side forces and
increased vibration and becoming overloaded.
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