Hitachi ZAXIS 120-3 class, Operator'S Manual

Page: 171 / 461

OPERATING THE MACHINE
5-22
• Do not operate breaker with the arm positioned vertically.
Excessive vibration to the arm cylinder will occur, causing
oil leakage.
• Press the breaker so that the chisel (the axis) is positioned
and thrust perpendicular to the object.
• Do not operate the breaker continuously longer than one
minute. Excessive chisel wear will result. If an object could
not be broken within one minute, apply the chisel to
other locations, less than one minute for each location.
• Raising the front part of the undercarriage by pressing
down the breaker may cause damage to the front attach-
ment. Although raising the front edge of the undercar-
riage up to 150 mm (6 in) is tolerable, do not practice this
method more than necessary. Never raise the front edge
of the undercarriage higher than 150 mm (6 in) by press-
ing the breaker down.
M147-05-013
M147-05-014
M147-05-015
M147-05-016
RIGHT WRONG
If an object could not be broken
within one minute, apply the
chisel to other locations, less than
one minute for each location.
WRONG
Pressing
Down
Raising 100 to
150 mm