SERVICE MANUAL
INTRODUCTION
Introduction
PROBLEM: EXCESSIVE AIR INLET RESTRICTION
REASON OR CAUSE:
1.
Operator error
a.
gauge inaccurate
b.
improper consideration of specifications vs. gauge locations
c.
no orifice in sintered fitting in Donaldson valve connection or orifice plugged
2.
Dirty element.
3.
Damaged element.
4.
Incorrect size element
5.
Damaged inlet piping.
6.
Excessive bends in piping.
7.
Rain cap blocks air inlet pipe opening.
8.
Air intake and cab air duct misaligned in cab over models.
PROBLEM: ENGINE "MISFIRING" - ERRATIC VISUAL SMOKE
REASON OR CAUSE:
1.
Plugged nozzle orifices (holes).
2.
Low nozzle valve opening pressure.
3.
Improper valve lash adjustment.
4.
Valves and/or seat wear (leakage).
5.
Cylinder head gasket leakage.
6.
Defective injection pump.
7.
Incorrect valve timing.
8.
Air in fuel system.
PROBLEM: EXCESSIVE BACK PRESSURE AFTER TURBOCHARGER
REASON OR CAUSE:
1.
Operator error...
a.
gauge inaccurate
CGES-185-3
PRINTED IN UNITED STATES OF AMERICA
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