Method Of Using Troubleshooting Chart - Komatsu Galeo PC800-8 Shop Manual

40 Troubleshooting
Troubleshooting of engine (S-mode)

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 phe-
nomena 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 nar-
row 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 prob-
able one by applying troubleshooting tools or direct
inspection.
Items listed in the [Questions] and [Check items]
and related to the [Causes] are marked with
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
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 E (If no items have other
marks and the causes cannot be narrowed,
however, you may apply them.)
PC800, 850-8
E , Q ,
SEN00795-02
3