Komatsu PC450-8 Operation & Maintenance Manual page 426

MACHINE OPERATIONS AND CONTROLS
FUNCTION CHECK
Make certain that the valves on each side of the first boom
section are switched to the correct mode BEFORE starting
the engine. The valves control the operation of crusher rotate
and the boom release pins. If the valves are operated incor-
rectly, death and serious damage could occur.
Position A - Attachment rotation operates.
Position B - Hydraulic pin operates.
PRECAUTIONS WHEN OPERATING
q When operating the high reach demolition equipment, select
a specialist operator and do not allow any other person to
operate the machine.
q Check that the ground inside the operating range is flat and
firm.
q Never operate the boom outside the specified working range.
There is danger that the machine may overturn.
As far as possible, always carry out operations to the front of
rear of the tracks; do not carry out work to the left or right of
the tracks.
Max. working radius to front and rear: 13 m
For details of the working range, WORKING RANGE AND
USING RANGE OF BOOM (7-27)
If work is carried out outside the specified operating range
(to the front or rear of the track), the warning buzzer (continu-
ous sound) will sound. If this happens, return the boom to a
safe working range.
q Wherever possible, carry out demolition jobs as well as
movements of the attachment or machine, with the machine
upper structure and tracks aligned and the drive sprocket
positioned at the rear.
7-16
HIGH REACH DEMOLITION EQUIPMENT 27M
WARNING
WARNING
7
A
B
7