Kato SR-300L, Инструкция по эксплуатации

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WARNING
(3) Start and stop any lever operation gradually
Sudden starting, acceleration and stopping and other sudden or
violent operations are dangerous as they reduce the stability of
the load and cause the crane to break. Always operate the levers
and pedals smoothly and securely.
(4) Precautions when lifting long objects
Long loads are dangerous because they are unstable when lifted.
In these cases, tie a guide rope to each end of the load and hold
the lifting load stable.
(5) Proceed cautiously with compound operations
Compound operations combining winch hoisting and lowering,
slewing, and boom derricking and lowering will be slower than
the individual operations. When switching from compound to
single operation, work the controls slowly and smoothly with
no sudden changes of speed.
(6) Addition of counterweights beyond the specification is
forbidden
If counterweights not included in the specification are added,
they put an unreasonable strain on the crane and may damage it.
When the load is removed, the excessive counterweight may
cause the crane to tip over to the rear. Never use counterweights
which do not conform to the specification.