Hand Signals - Komatsu WB93S-5 F50003 Operation & Maintenance Manual

2.4.3 HAND SIGNALS

When it is necessary to position loads, make excavations or move the machine with a reduced field of
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vision, the operator must be helped by another person (signalman) who should stand on the ground and
give signals to indicate the manoeuvres to be carried out according to the specific instructions provided
for by the relevant regulations.
No movement or operation may be carried out if the signals have not been clearly understood by the
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operator and the signalman.
When additional instructions different from those defined by the hand signalling system are necessary,
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these must be agreed upon by the two operators before starting the job.
Only one person must be entrusted with giving signals.
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The operator must make sure that the signalman is always within his field of vision and follow all his
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signals.
The use of hand signals serves to direct the lifting, handling and positioning of the loads lifted by the work
equipment. Hand signals can also be used during digging operations or when the machine travels, if the field of
vision of the operator is reduced. The direction of movement of the hands and arms in relation to the machine must
define the signal, independently of the position of the signalman. Hand signals must be given following the
indications below.
1 - LIFT THE LOAD VERTICALLY
One forearm in vertical position and forefinger pointing
upwards: turn the hand making small circles.
2 - LOWER THE LOAD VERTICALLY
One arm down and forefinger pointing downwards: turn the
hand making small circles.
PRECAUTIONS TO BE TAKEN DURING WORK
WARNING
RKA15140
RKA15150
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