Palfinger PK 34002-SH P7, Original Operating Manual

Page: 186 / 260

Crane operation
180
Working position of the crane
Load capacity, component wear, and working life of the crane are among others dependent on the
working position.
In adverse working positions:
x the bearings, joints and crane components are under higher stress and therefore wear out quicker;
x
the specified load may not be reached;
x the component wear increases.
The crane must always be in an optimum working position for the task at hand.
Working range
Optimum working range:
XX°
XX° = optimum angle of main boom (between 15° and 30°, dependent on crane type).
Refer to load capacity chart attached to the crane.
The optimum angle is reached when the lift cylinder is vertical to the main boom or the linkage system
(depending on the crane model).
Lower range limit:
Caution!
Any working position with main boom completely lowered is
prohibited. In this position the crane may be overloaded.
Consequently the load may fall down. This creates an acute risk of
fatality for the operator and others.
Avoid to position the main boom near the lower limit stop. If the main boom is
completely lowered (at mechanical stop of cylinder), the overload protection system
is unable to act. Always use the outer boom to carry out work in this range.