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Diesel Engine Introduction
4
About the Manual
This Troubleshooting and Repair Manual is intended to aid in determining the cause of engine-related problems
and to provide recommended repair procedures.
The material in this manual covers all Signature engines. The manual is divided into sections. Each section is
equivalent to a group used in Cummins filmcard system. Some sections contain reference numbers and
procedure numbers. Reference numbers provide general information, specifications, diagrams, and service tools
where applicable. Procedure numbers are used to identify and reference specific repair procedures for correcting
the problem.
This manual is designed so the troubleshooting trees are used to locate the cause of an engine problem. The
troubleshooting trees then direct the user to the correct repair procedure. The repair procedures within a section
are in numerical order. However, the repair steps within a given procedure are organized in the order the repair
must be performed, regardless of the numerical order of the steps. The user must use the Section Contents pages
or the Index at the back of the manual to locate specific topics when not using the troubleshooting trees.
How to Use the Manual
This manual is organized to provide an easy flow from problem identification to problem correction. A list of
troubleshooting symptoms containing the most common engine problems is in the Troubleshooting Symptoms,
Section TS. The manual is designed to use the Troubleshooting Symptoms as a guide to locating the problem and
directing the end user to the correct procedure for making the repair. Complete the following steps to locate and
correct the problem.
(Step 1) Locate the symptom on the Section Contents pages of Section TS.
Reference to the page number where the Troubleshooting Symptom Tree is
found is made to the right of the symptom tree title.
(Step 2) The left column of boxes in the Troubleshooting Symptom Charts indicates a
probable cause of the problem, starting at the top with the simplest and easiest to
repair, and continuing downward to the most difficult.
The right column of boxes provides a brief description of the corrective action
with a reference number to the correct procedure used to make the repair.
(Step 3)
Locate the probable cause in the left column; then turn to the procedure
referenced in the right column.
(Step 4) The Troubleshooting Symptom Charts are based on the following assumptions:
1. The engine has been installed according to the manufacturer's specifications.
2. The easiest repairs are done first.
3. "Generic" solutions cover problems with the most common applications and
original equipment manufacturer (OEM).