Hydraulic Breaker Operating Tips - Hitachi EX27U Operator's Manual

HYDRAULIC BREAKER OPERATING TIPS

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Select a breaker that is the correct size and weight for your
machine. See your authorized dealer for correct breaker
information.
Carefully study the operator's manuals of the machine and
breaker, and perform the required checks and/or inspec-
tion before connecting the breaker to the arm.
Precautions for Connecting Breaker Piping
(1) When the breaker is not used, apply cover to the
pipe end on the arm top and install plug into the
hose end of the breaker to prevent entry of con-
tamination into the system.
(2) Be sure to provide spare covers and plugs in the
tool box so that they will be available when
needed.
(3) Avoid allowing contamination to enter into the sys-
tem when switching the breaker with the bucket.
(4) After connecting, check the connecting seal fitting
for oil leakage, and pipe clamp bolts for looseness.
Precautions for Hydraulic Breaker Operation
Perform the required checks and inspection daily before
operation.
CAUTION: A breaker is heavier than an excava-
tion bucket. Stability will be reduced when oper-
ating the machine with breaker attachment.
In addition, hydraulic breaker operation may
cause soil and dust to scatter, and fragments of
rocks and broken pieces of metal to fly. Take nec-
essary precautions to prevent the machine from
tipping over and avoid potential accidents. Also,
observe the following precautions to avoid dam-
age to the machine as well as to avoid potential
accidents.
1. Since the hydraulic breaker is heavier than the bucket,
lowering of the front attachment is faster with the hy-
draulic breaker attached. Do not hit the breaker hard
against the hard materials (e.g. rocks, concrete, etc.).
Doing so will damage the front attachment as well as
the upperstructure.
2. Do not use any part of the hydraulic breaker to move
rocks or other heavy materials, or machine damage
may result.
Never move objects, in particular, using the breaker
mounting bracket by swinging the upperstructure.
Doing so will cause damaging the front attachment as
well as the breaker.
OPERATING THE MACHINE
5-23
WRONG
M586-05-025
WRONG
M585-05-020