Temporary Interruption of Crane Operations
As a general rule, if it is not possible to maintain sufficient control over a rigged crane, the
boom and the equipment shall be taken down if the crane's operations are interrupted and
may be left unsupervised.
The following instructions are valid for every mobile crane, regardless of the type, the
configuration, the rigging mode and the environment:
• The crane shall be left in the smallest, most stable, valid operational configuration that
the job site practically allows; this includes parameters such as boom angle, slewing
orientation, jib angle.
• The engines shall be switched off.
• All control levers shall be put into the neutral or in a “locked” position.
• The heating system should be switched off.
• The crane shall be secured and the cabins shall be locked to prevent unauthorized use
or unintended movement.
• Close all control panels that are fitted with a lock/key when they are not in use.
• Depending on the crane type, mobile control panels connected to the crane with
cables shall be removed when they are not in use.
• The radio remote control, if it is available, shall be kept in a safe place to prevent
unauthorized use or unintended movement. Make sure that the batteries are recharged.
• The parking brake of the crane chassis shall be applied.
• Transmission gear shall be set to neutral.
• The wheels shall be secured with chocks, the slew brake applied and the main boom
secured.
If the crane is in erected mode and the jobsite conditions do not permit the boom and jib of
a crane to be fully lowered to the ground, the configuration in which the crane should be
left while unmanned shall be determined by a qualified crane operator familiar with the
crane, the job site configuration, conditions, and limitations. In addition, following
instructions shall be observed:
• A suitable and safe emergency plan shall be worked out to allow bringing the crane
into a safe position in case of emergency such as an unforeseen weather change or
other possible incidents as listed at the beginning of this document. This plan shall
also include sufficient space around the crane to enable dismantling or lowering of
boom or equipment, etc.
• The crane shall be left with no load on the hook.
• All slings or fastening ropes shall be removed from the crane hook.
• The hook block shall be at the highest position so that there is no contact possible
between the wire ropes and the boom or other obstacles.
45P/N 12261-683 REVISED: January 2015
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