Precautions For Breaker Operation - Hitachi ZAXIS 70 Operator's Manual

PRECAUTIONS FOR BREAKER OPERATION

CAUTION: Machine stability is reduced as the
breaker is much heavier than the bucket.
When using a breaker, the machine is more apt to
tip over. Also, flying objects may hit the cab or
other part of the machine. Observe the following
precautions and take any other precautions nec-
essary to prevent accidents and machine damage
from occurring.
• Avoid hitting objects with breaker.
The breaker is heavier than the bucket, causing the
breaker to lower faster.
Take care not to hit any objects with breaker. Doing so
will result in damage to the breaker, the front attach-
ment, and/or the upperstructure. Always move (lower)
the breaker slowly to position the tip of the chisel on
the object to be broken before starting breaker opera-
tion.
• Do not use the breaker and/or the swing function to
move objects. Damage to the boom, arm, and/or
breaker may result.
• To prevent cylinder/machine damage, do not operate
the breaker with the hydraulic cylinder rod fully re-
tracted or fully extended.
• Stop operation if breaker hydraulic hoses jump ab-
normally. Change in breaker accumulator pressure or
a damaged accumulator will cause abnormal hose
jumping and may cause breaker and/or machine dam-
age.
Immediately contact your authorized dealer if this
happens.
OPERATING THE MACHINE
5-19
Hose jumping abnormally
Hose jumping
abnormally
WRONG
M104-05-055
WRONG
M104-05-056
WRONG
M104-05-057
Accumulator
M104-05-058