User Manual
2
1.Breif introduction
This manual is made for the crawler cranesQUY260 of Zoomlion. Please read the manual carefully
according the collocation of different types.
2.General information
The Hirschmann load moment indicator (LMI) iFLEX5 has been designed to provide the crane
operator with the essential information required to operate the machine within its design parameters.
Using various sensing devices, the Load Moment Indicator monitors various crane function and
provide the operator with a continuous reading of the load capacity. The readings continuously change
as the crane moves and lifts. The LMI provides the operator with information regarding the length and
angle of the boom, tip height, working radius, rated load and total weight of actual lift.
If non-permitted condition is approached, the iFLEX5 Load Moment Indicator will warn the operator
by sounding an audible alarm, lighting a warning light and cutting off those functions that may
aggravate the crane’s condition.
3.Warnings
The LMI is an operational aid that warns a crane operator from approaching conditions of overloading
and over-hoisting which would cause great damage to the equipment and personnel.
The LMI could only prevent overload of the crane boom in lengthwise vertical level but could not
prevent accidents caused by inclined hoisting, wind loading, inclination or foundering of the road and
rail or driving oversteps. So the operators and other people shall not ignore safe management and
operating procedures of the crane because of the existence of the device. It is not, and shall not,
substitute for a good operator’s judgment, great experience or standard operating procedures. The
responsibility for the safe crane operation shall remain with the crane operator who shall ensure that all
warnings and instructions supplied are fully understood and observed.
Prior to operating the crane, the operator must carefully and thoroughly read and understand the
information in this manual to ensure that he knows the operation and limitations of indicator and crane.
Notice：The LMI can only work correctly, if all adjustments have been properly set. For correct
adjustment, the operator has to answer thoroughly and correctly all questions asked during the setup
procedure in accordance with the real rigging state of the crane. To prevent material damage and
serious or even fatal accidents, the correct adjustment of the LMI has to be ensured before starting the
crane operation.
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