About the Manual
This N14 Troubleshooting and Repair Manual is intended to aid in determining the cause of engine-related
problems and to provide recommended repair procedures. The manual is divided into sections. Some sections
contain reference numbers and procedure numbers. The reference numbers provide general information, spec-
ifications, diagrams, and service tools, where applicable. The procedure numbers describe specific repair pro-
cedures and are referred to in the Troubleshooting Logic Charts.
How to Use the Manual
The 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 on Page T-2 in the Troubleshooting
Section. Complete the following steps to locate and correct the problem:
(STEP 1.) Locate the symptom on the list.
Reference is made to the page number where the″Troubleshooting Logic Chart″ is found.
(STEP 2.) The left column of the ″Troubleshooting Logic Chart″ indicates a probable cause, starting at the
top with the simplest and easiest to repair or most likely to occur, and continuing downward to the
most difficult and least likely to occur.
The right column provides a brief description of the corrective action with a procedure number or
bulletin number reference for the repair procedure.
(STEP 3.) Locate the probable cause in the left column, and then turn to the procedure referenced in the right
column or consult the bulletin number specificed.
The repair procedures are listed by system (cooling, lubricating oil, combustion air, compressed
air, fuel, electrical, and base engine components).
(STEP 4.) The Troubleshooting Logic 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 to cover problems with the most common applications and OEM’s (Original
Equipment Manufacturer).
About the Manual Section i - Introduction
N14Page i-2
To Next Page
Loading...
