Method Of Using Troubleshooting Chart - Komatsu PC130-8 Shop Manual

SEN04125-02

Method of using troubleshooting chart

The troubleshooting chart consists of the "questions", "check items", "causes", and "troubleshooting" 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 operator, 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 verifying the narrowed causes finally in order from the most
probable one by applying troubleshooting 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.)
4
40 Troubleshooting
E
. (If no items have other marks and
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PC130-8