SANY LATIN AMERICA
7-3
SY195/205/215/225C9 Crawler Hydraulic Excavator
Troubleshooting
Shop Manual - June 2013
7
TROUBLESHOOTING
7.1
Points to Remember When Troubleshooting
The aim of troubleshooting is to pinpoint the
basic cause of the failure, to carry out repairs
swiftly, and to prevent reoccurrence of the fail-
ure.
When carrying out troubleshooting, important
point is to understand the structure and func-
tion.
However, a short cut to effective troubleshoot-
ing is to ask the operator various questions
to form some idea of possible causes of the
failure that would produce the reported symp-
toms.
1. When carrying out troubleshooting, do not
hurry to disassemble the components.
If components are disassembled immedi-
ately any failure occurs:
●
Parts that have no connection with the
failure or other unnecessary parts will
be disassembled.
●
It will become impossible to find the
cause of the failure.
It will also cause a waste of man-hours,
parts, or oil or grease, and at the same
time, will also lose the confidence of the
user or operator.
For this reason, when carrying out
troubleshooting, it is necessary to carry out
thorough prior investigation and to carry
out troubleshooting in accordance with the
fi
xed procedure.
2. Points to ask user or operator:
1) Have any other problems occurred apart
from the problem that has been reported?
2) Was there anything strange about the
machine before the failure occurred?
3) Did the failure occur suddenly, or were
there problems with the machine condition
before this?
4) Under what conditions did the failure oc-
cur?
5) Had any repairs been carried out before
●
Stop the machine in a level ground, and check that lock pins, blocks, and parking brake are
securely
fi
tted.
●
When carrying out the operation with two or more workers, keep strictly to the agreed signals,
and do not allow any unauthorized person to come near.
●
If the radiator cap is removed when the engine is hot. Hot coolant may spurt out and cause
burns, so wait for the engine to cool down before starting troubleshooting.
●
Be extremely careful not to touch any hot parts or to get caught in any rotating parts.
●
When disconnecting wiring, always disconnect the negative (–) terminal of the battery
fi
rst.
●
When removing the plug or cap from a location which is under pressure from oil, water, or air,
always release the internal pressure
fi
rst. When installing measuring equipment, be sure to
connect it properly.
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