The figures with mark ★ apply for excavators whose
hydraulic breaker operation time is more than 100%. For the
hydraulic breaker operation time ratio is less than 100%,
the replacement interval should be as the diagram shows.
When the machine operates hydraulic breaker continuously
more than 100 hours, replace hydraulic oil filter core.
Set the pedal to the lock position when
it is not used. If not, if any controls
should be touched accidentally when the
pedal has not been locked, it may cause
serious accident.
Hydraulic breaker
operation time
percentage (%)
3.8 BOOM SWING
The boom swing pedal locates at the position of operator’s right foot, it is used to swing boom,
but the superstructure (cabin, engine, etc) won’t slew when operating this pedal.
A. Treadle lower side of pedal, swing boom to right
side.
B. Treadle higher side of pedal, swing boom to left
side.
FIG.3-41 Replacement interval (hours)
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