Kato SR-300L, Instruction Manual

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18-5 Slewing
(4210-3254-0E)
: Set the crane operation switch to the "ON" position and push the left control lever left to slew the crane left.
: Set the crane operation switch to the "ON" position and push the left control lever right to slew the crane right.
(1) Set the crane operation switch to the "ON" position.
(2) Release the slewing lock lever.
(3) Set the slewing free/lock switch to free or lock as necessary for the operation to be carried out.
(4) Set the slewing brake switch to the "release" position.
(5) Press the slewing alarm button on the left control lever to sound the horn to warn nearby workers that you are
about to slew the crane.
(6) Check again for safety around the crane and operate the left control lever to slew the crane right or left.
Precautions when slewing
・ Do not use slewing to drag a load sideways.
・ Check the safety before slewing and pay attention to people and obstacles nearby while
slewing.
・ When operating the crane with the outriggers at anything other than full extension, refer to the
rated lifting capacity chart and work according to the applicable value in the chart.
・ If the ACS sound alarm is emitted during slewing operation, slow to a slewing speed which
will allow you to stop quickly and safely at any time or stop slewing immediately and take
emergency action such as reversing the slewing direction, derricking or retracting the boom,
or lowering the load to the ground while watching the safety level indicator lamps until it
reverts to the green zone.
(611A-0076-0E)
NOTE
During "inching" and other fine positioning movements, the slewing free/lock switch should be set to "lock", but
if "lock" is in use and the slewing lever is returned suddenly to neutral, the superstructure stops suddenly,
causing the load to swing and affecting the structure of the crane adversely, so work carefully in this case.