Gradall 534B (9103-1390) Service Manual - Manual (Page 17)

HAND SIGNALS
Standard Signals - When handler work conditions
require hand signals, they shall be provided or
posted conspicuously for the use of both signalman
and operator. No handler motions shall be made
unless signals are clearly understood by both
signalman and operator.
Special Signals - When signals for auxiliary
equipment functions or conditions not covered are
required, they shall be agreed upon in advance by
the operator and signalman.
Instructions - When it desired to give instructions
to the operator other than provided by the
established signal system all handler motions shall
first be stopped.
EMERGENCY STOP - With both
arms extended laterally hands open
downward, move arms back and
forth.
EXTEND TELESCOPIC BOOM -
With both hands clenched, point
thumbs outward.
MOVE LOAD OUT HORIZONTALLY
With either arm extended, hand
raised and open toward direction of
movement, move hand in direction of
required movement.
CLOSE BUCKET - Hold one hand
closed and stationary. Rotate other
hand in small vertical circle with
forefinger pointing horizontally at
closed hand.
STOP - With either arm extended
laterally, hand open downward,
move arm back and forth.
RETRACT TELESCOPIC BOOM -
With both hands clenched, point
thumbs inward.
MOVE LOAD HORIZONTALLY -
With either arm extended, hand
raised and open toward direction of
movement, move hand in direction of
required movement.
OPEN BUCKET - Hold one hand
open and stationary. Rotate other
hand in small vertical circle with
forefinger pointing horizontally at
open hand.
RAISED BOOM - With either arm
extended horizontally, finger
closed, point thumb upward.
RAISED LOAD VERTICALLY - With
either forearm vertical, forefinger
pointing up, mover hand in small
horizontal circle.
TILT FORKS UP - With one arm held
at side, extend other arm upward at
about 45°.
MOVE SLOWLY - Place one hand
motionless in front of hand giving
motion signal. (Raise load slowly is
shown.)
LOWER BOOM - With either arm
extended horizontally, fingers
closed, point thumb downward.
LOWER LOAD VERTICALLY - With
either arm extended downward
forefinger pointing down, move hand
in small horizontal circle.
TILT FORKS DOWN - With one arm
held at side, extend other arm
downward at about 45°
THIS FAR TO GO - With hands raised
and open inward, move hands
laterally, indicating distance to go.
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STOP ENGINE - Draw thumb or
forefinger across throat.