Troubleshooting
Safety, Operation and Maintenance Manual - Aug 2012
6-10
SY115C9/135C/155H Crawler Hydraulic Excavator
6.1.5 Hydraulic components handling precautions
With the increase in pressure and precision
of hydraulic equipment, the most common
cause of failure is dirt (foreign material) in the
hydraulic circuit. When adding hydraulic oil, or
when disassembling or assembling hydraulic
equipment, it is necessary to be particularly
careful.
1. Be careful of the operating environment
Avoid adding hydraulic oil, replacing
fi
lters,
or repairing the machine in rain or high
winds, or places where there is a lot of
dust.
2. Disassembly and maintenance work in the
fi
eld
If disassembly or maintenance work is
carried out on hydraulic equipment in the
field, there is danger of dust entering the
equipment. It is also dif
fi
cult to con
fi
rm the
performance after repairs, so it is desir-
able to use unit exchange. Disassembly
and maintenance of hydraulic equipment
should be carried out in a specially pre-
pared dust-proof workshop, and the per-
formance should be con
fi
rmed with special
test equipment.
3. Do not let any dirt or dust get in during
re
fi
lling operations.
Be careful not to let any dirt or dust get
in when refilling with hydraulic oil. Always
keep the oil filler and the area around it
clean, and also use clean pumps and oil
containers. If an oil cleaning device is
used, it is possible to
fi
lter out the dirt that
has been collected during storage, so this
is an even more effective method.
ZX215-1000025
ZX215-1000023
Fig. 6-1
Fig. 6-2
