Komatsu 170-3 Series Shop Manual page 143

TROUBLESHOOTING
170-3 SERIES
METHOD OF USING TROUBLESHOOTING CHART
Five causes
Clarify the relationship between the three symptoms in
the [Questions] and [Check items] section and the five
Cause items in the vertical column.
Three symptoms
Add up the total of and
limes for the three symptoms and the vertical columns for
the causes intersect.
(1) Clogged air cleaner element:
(2) Defective contact of valve, valve seat:
(3) Leakage of air between turbocharger
and head:
(4) Worn piston ring, cylinder liner:
(5) Defective timing rail pressure sensor:
The calculation in Step 2 show that the closest
relationship is with [Worn piston ring, cylinder liner].
Follow this column down to the troubleshooting area and
carry out the troubleshooting item marked
The Remedy is given as [Clean], so carry out cleaning,
and the exhaust gas color should return to normal.
Step 1
Step 2
marks where the horizontal
Step 3
.
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