Komatsu PC450-8 Operation & Maintenance Manual page 51

SAFETY
PROHIBITED OPERATIONS
q
Never dig the work face under an overhang. There is a haz-
ard that rocks may fall or that the overhang may collapse
and fall on top of the machine.
q
Do not excavate too deeply under the front of the machine.
The ground under the machine may collapse and cause the
machine to fall.
q
To make it easier to escape if there is any problem, set the
tracks at right angles to the road shoulder or cliff with the
sprocket at the rear when carrying out operations.
q
Do not carry out demolition work under the machine. There
is a hazard that the machine may become unstable and tip
over.
q
When working on or from the top of buildings or other struc-
tures, check the strength and the structure before starting
operations. There is a hazard of the building collapsing and
causing serious injury or damage.
q
When carrying out demolition work, do not carry out demoli-
tion above your head. There is a hazard of broken parts fall-
ing or of the building collapsing and causing serious injury or
property damage.
SAFETY MACHINE OPERATION
2-27