8-7
OPTIONS
• Do not pound with the cylinder fully
extended or retracted (at the stroke end).
Leave a margin of at least 50mm(2 in).
HYDRAULIC BREAKER
REPLACING THE HYDRAULIC OIL
REGULARLY
When a hydraulic breaker is used, the oil
deteriorates more quickly than that used for
a usual operation. Be sure to replace the
hydraulic oil and the return filter elements.
• Failure to replace these in time can lead to
damage to the machine and the breaker
hydraulic system. To improve the service
life of the hydraulic systems, be sure to
replace the hydraulic oil and return filter
element after the number of hours shown
on the diagram below.
• When replacing the hydraulic oil, clean the
suction strainer.
Replacement interval (hours)
Item Hydraulic oil
Filter
element
1st time — 25
2nd time — 100
Periodically 600 200
When the breaker operating ratio is 100%.
• Do not pound with the arm placed
perpendicular to the ground surface.
• Do not drop the breaker itself on the object
to be broken in order to break it.
• Do not move objects to be broken or rocks
with the breaker itself.
• Slew the machine occasionally to cool the
engine.
• If a hydraulic hose is vibrating abnormally,
nitrogen gas may be leaking from the
accumulator. Ask for an inspection early.
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