TESTING AND ADJUSTING TROUBLESHOOTING
POINTS TO REMEMBER WHEN TROUBLESHOOTING
Troubleshooting means locating the basic cause of the failure, and carrying out swift repairs, and
ensuring that the failure does not occur again.
When carrying out troubleshooting,
it
is of course important to understand the structure and function.
But to carry out the troubleshooting effectively,
a
quick method is to carry out troubleshooting using
the problems mentioned by the operator as
a
guide in locating the cause.
1.
Do not disassemble the machine simply
because there is a failure
If
the machine is disassembled immediately
just because there is
a
failure:
0
Unrelated or unnecessary places are also
0
It becomes difficult to locate the cause
This means that there is not only
a
waste of
time and money on replacement parts, oil,
and grease, but this action will also lose the
confidence of the user and operator.
For this reason also,
it
is important to carry
out troubleshooting based on full investiga-
tion before starting and troubleshooting fol-
lowing before the correct order.
disassembled
of the failure
2.
Questions to ask the user and operator
1)
Are there any problems other than those
already reported?
2)
Did anything unusual happen before the
failure occurred?
3)
Did the failure occur suddenly, or had
the condition of the machine been poor
before the failure occurred?
4)
What were the conditions when the
fail-
ure occurred?
5)
Had any repairs been carried out before
the failure occurred?
6)
Had any similar failure occurred before?
3.
Check before troubleshooting
1)
Check the oil level.
2)
Check for any external leakage of oil from
the piping and hydraulic equipment.
3)
Check the travel of the control levers.
4)
Other maintenance items can also be car-
ried out visually,
so
carry out any check
that
is
considered necessary.
4.
Confirming failure
Check the degree of the problem to judge
for yourself if
it
is really
a
failure, or if there
is some problem in the handling or opera-
tion of the machine.
*
When driving the machine and re-enact-
ing the failure, be sure that the investi-
gation or measurement does not make
the failure worse.
5.
Troubleshooting
Narrow down the cause of the failure from
the results of the questions and checks in
the above Items
2
-
4,
then follow the trou-
bleshooting flow charts to locate the failure.
*
Basic procedure for troubleshooting
1)
Start from the simple places.
2)
Start from the most probable places.
3)
Investigate related parts also.
6.
Basic action to remedy cause of failure
Even
if
the failure is repaired, if the root
cause of the failure is not repaired, the same
failure will occur again.
To
prevent this,
it
is necessary to investigate
why the failure occurred, and to remove the
root cause of the failure.
12-1
06
95-2
SERIES
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