Kato SR-300L, Instruction Manual

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14-3 Precautions on crane operation
(541A-0149-2E)
Familiarize yourself with the following points before you start to operate the crane. There is a safety sign of the rated
lifting capacity chart inside the cab on which the summary of these same points is also given. Always read them before
you start to operate the crane.
14-3-1 Precautions when the outriggers are used
(611A-0029-0E)
(1) The rated lifting capacity chart for boom operation is based on the assumption that the jib is stowed on the boom.
(2) The rated lifting capacities indicate the maximum load which the boom can lift when its body is level on firm,
level ground. They include the mass of the main hook and slings for crane operation, and the mass of the auxiliary
hook and slings for jib operation.
[30 ton hook: 250kg, 4 ton hook: 80kg]
Within the table, the capacities enclosed with bold lines are based on the structural strength of the crane while
other capacities are based on the stability of the crane.
(3) The working radii written in the rated lifting capacity chart are the actual values allowing for boom deflection.
Therefore you must always operate the crane on the basis of the working radius.
(4) The jib working radii in the rated lifting capacity chart are based on a boom length of 30.5m and the values
indicated are for crane operation with the jib mounted on the end of this boom length. When operating at other
boom lengths, do not use the working radius but the boom angle as the criterion.
(5) Lock the suspension first after arriving on site then set the outriggers. Keep this arrangement until all crane
operations are complete and the machine is about to leave the site and drive on the road. Always keep the
suspension locked for moving between different working positions on site. Never release the suspension lock.
(6) As a general rule, use the outrigger control panel on the carrier body to set the outriggers, but if you unavoidably
have to operate the outriggers from the cab, ask another worker to insert the stopper pins and place the boards
under the outrigger feet.
(7) The hoisting capacity can vary for different operating regions, depending on the extension status of respective
outriggers. Therefore, to ensure safe operation, always fully extend all outriggers before operating the crane.
However, if full extension is not possible, such as due to an immovable obstruction, contact the job supervisor to
obtain authorization. Then check how far outriggers are extended and use the rated lifting capacity chart inside the
crane to verify the crane capacity separately for each region.
Outrigger extension status
Intermediate
extension (6.0m)
Intermediate
extension (5.0m)
Intermediate
extension (3.8m)
Full
retraction
Area α° 35 30 20 3
(511A-0050-0E)
(8) After setting the outriggers, you must insert the stopper pins into the outriggers and check the extension width.
Also check carefully that all four tires are clear of the ground, that all floats are firmly in contact with the ground
and that the ground on which the outrigger floats are resting is sufficiently strong.
(9) Set the "outrigger status" and "boom operation status" that will be used next on the ACS working status setting
screen correctly. If you will not be able to fully extend all outriggers in the actual work site, move the crane to a
more spacious area first, extend the outriggers fully and perform the ACS preoperational checks.