Method Of Using Troubleshooting Chart - Komatsu PC210-8 Shop Manual

40 Troubleshooting
Troubleshooting of engine (S-mode)

Method of using troubleshooting chart

The troubleshooting chart consists of the "ques-
tions", "check items", "causes", and "troubleshoot-
ing" blocks.
The questions and check items are used to pinpoint
high probability causes by simple inspection or
from phenomena without using troubleshooting
tools.
Next, troubleshooting tools or direct inspection are
applied to check the narrowed causes in order from
the most probable one to make final confirmation
according to the troubleshooting procedure.
[Questions]
Items to be drawn from the user or operator.
They correspond to A and B in the chart on the
right. The items in A are basic ones. The
items in B can be drawn from the user or oper-
ator, depending on their level.
[Check items]
Simple check items used by the serviceman to
narrow the causes. They correspond to C in
the chart on the right.
[Causes]
Items to be narrowed from the questions and
check items. The serviceman narrows down
the probable causes from A, B, and C.
[Troubleshooting]
Items used to find out the true cause by verify-
ing the narrowed causes finally in order from
the most probable one by applying trouble-
shooting tools or direct inspection.
Items listed in the [Questions] and [Check items] and related to the [Causes] are marked with E, Q, and w.
E: Causes to be referred to for questions and check items
Q : Causes related to questions and check items
w : Causes highly probable among ones marked with Q
a When narrowing the "causes", apply the items marked with w before those marked with Q.
When narrowing the causes, do not apply the items marked with
the causes cannot be narrowed, however, you may apply them.)
PC210, 230, 240-8
E . (If no items have other marks and
UEN00246-02
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