Hydraulic Breaker (Optional) - Hitachi ZX27U-2 Operator's Manual

HYDRAULIC BREAKER (OPTIONAL)

Before installing a hydraulic breaker to the machine,
change in machine stability, and the hydraulic pressure
and flow rate to operate the hydraulic breaker must be
checked. Consult your authorized dealer for selection of
the hydraulic breaker model to be installed. Refer to the
Breaker Operation Manual for operation of the hydraulic
breaker. Observe the following instructions to prevent
the base machine and the hydraulic breaker from being
damaged.
Precautions for Installing Hydraulic Breaker Pipe
Lines
•
When disconnecting or reconnecting the hydraulic
breaker hoses from or to the hydraulic pipe lines at the
arm tip, take care not to allow dust to stain or enter the
inside of pipes and hoses.
•
When the hydraulic breaker is not installed, be sure to
put caps or plugs on the arm tip pipe open ends and
the hydraulic breaker side hose ends to prevent the
hydraulic system from being contaminated by dust. Be
careful not to lose the caps and plugs. Always keep
the auxiliary parts in the tool box.
•
Check that the pipe clamp bolts are tight, and no oil is
leaking from the pipe and hose joints before operating
the hydraulic breaker.
Precautions for Hydraulic Breaker Operation
WARNING: When the hydraulic breaker is in-
stalled, machine stability is reduced as the
breaker is much heavier than the bucket. In addi-
tion, soil, broken pieces of rock or metals may be
scattered during breaker operation, potentially
creating a hazardous situation. Take protective
measures against the danger of the machine tip-
ping over and/or the scattering of hard materials
and observe the precautions described below to
ensure safe operation.
1. Avoid crashing the breaker onto hard materials.
The breaker is heavier than the bucket, causing the
lowering speed of the breaker to become faster. If
breaking hard materials by crashing the breaker onto
hard materials is attempted, damage to the front at-
tachment and/or the upperstructure may result due to
accelerated crashing reaction force.
2. Do not move crushed materials using the breaker unit
and/or the swing function. Damage to the boom, arm,
and/or breaker may result.
OPERATING THE MACHINE
5-19
WRONG
M1M7-05-020
WRONG
M585-05-020