DIAL 1C4078 - Caterpillar

Introduction
This special Instruction provides information on the latest fuel system problems. It can be used as a troubleshooting guide for service claims analysis.The Troubleshooting Guide is arranged in segments to identify the Failure, the Engine Symptom(s), the Question(s) To Ask, and a brief Experience summary.Pump and Governor Claim Evaluation Guidelines For Most Common Failures
Illustration 1: Failure Points For Typical Fuel Injection Pump
Illustration 2: Failure Points For Typical Governor.Direct Injection Fuel Nozzles Claim Evaluation Guidelines For Most Common Failures (DIFN)
Illustration 3: Failure Points For Typical Direct Injection Fuel Nozzle.Mechanical Unit Injector (MUI) Claim Evaluation Guidelines For Most Common Failures
Illustration 4: Failure Points For Typical Mechanical Unit Injector.