Cummins N14 Series Engines Manual (EN)

FOREWORD

Foreword This manual contains complete rebuild specifications and information for the N14 model engines, and all asso- ciated components manufactured by Cummins Engine Company, Inc. A listing of accessory and component suppliers’ addresses and telephone numbers is located in Section C. Suppliers can be contacted directly for any information not covered in this manual. The repair procedures in this manual are based on the engine being installed on an approved engine stand. Some rebuild procedures require the use of special service tools. Make sure the correct tools are used as described in the procedures.

When a specific brand name, number, or special tool is referenced in this manual, an equivalent product can be used in place of the recommended item. A series of specific service manuals (Troubleshooting and Repair, Specifications, Alternative Repair, and so on.) are available and can be ordered by filling out and mailing the Literature Order Form located in the Service Literature Section L. Reporting of errors, omissions, and recommendations for improving this publication by the user is encouraged. Please use the postage paid, self-addressed Literature Survey Form in the back of this manual for communicating your comments.

The specifications and rebuild information in this manual is based on the information in effect at the time of printing. Cummins Engine Company, Inc. reserves the right to make any changes at any time without obligation. If differences are found between your engine and the information in this manual, contact a Cummins Authorized Repair Location, a Cummins Division Office, or the factory. The latest technology and the highest quality components are used to manufacture Cummins engines. When replacement parts are needed, we recommend using only genuine Cummins or ReCon T exchange parts. These parts can be identified by the following trademarks:

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TABLE OF CONTENTS

TABLE OF CONTENTS Page Introduction................................................................................................................................................ i-1 Group 0 - Engine Disassembly and Assembly........................................................................................... 0-1 Group 1 - Cylinder Block........................................................................................................................... 1-1 Group 2 - Cylinder Head...........................................................................................................................

2-1 Group 3 - Rocker Levers........................................................................................................................... 3-1 Group 4 - Cam Followers.......................................................................................................................... 4-1 Group 5 - Fuel System.............................................................................................................................. 5-1 Group 6 - Injectors and Fuel Lines............................................................................................................

6-1 Group 7 - Lubricating Oil System.............................................................................................................. 7-1 Group 8 - Cooling System......................................................................................................................... 8-1 Group 9 - Drive Units................................................................................................................................ 9-1 Group 10 - Air Intake System....................................................................................................................

10-1 Group 11 - Exhaust System ...................................................................................................................... 11-1 Group 12 - Air Equipment ......................................................................................................................... 12-1 Group 13 - Electrical Equipment ............................................................................................................... 13-1 Group 14 - Engine Testing........................................................................................................................

14-1 Group 15 - Instruments and Controls ........................................................................................................ 15-1 Group 16 - Mounting Adaptations ............................................................................................................. 16-1 Group 18 - Specifications............................................................................................................................18-1 Group 20 - Vehicle Braking....................................................................................................................... 20-1 Component Manufacturers:

Names and Addresses......................................................................................C-1 Service Literature .........................................................................................................................................L-1 Index............................................................................................................................................................X-1 Literature Survey Form ..............................................................................................................................back

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INTRODUCTION

Section I - Introduction N14 Page i-1 Section I - Introduction Section Contents Engine Diagrams .............................................................................................................................................. i-13 Page Engine Identification ........................................................................................................................................ i-12 General Cleaning Instructions ..........................................................................................................................

i-16 Glass or Plastic Bead Cleaning ...................................................................................................................... i-16 Solvent and Acid Cleaning ............................................................................................................................. i-16 Steam Cleaning ............................................................................................................................................. i-16 General Repair Instructions ...............................................................................................................................

i-3 General Safety Instructions ............................................................................................................................... i-4 Important Safety Notice.................................................................................................................................... i-4 Glossary Of Terms ............................................................................................................................................ i-10 Illustrations .........................................................................................................................................................

i-9 Manual Organization ........................................................................................................................................... i-2 Group Contents................................................................................................................................................ i-2 Index ............................................................................................................................................................... i-2 Metric Information............................................................................................................................................

i-2 Table of Contents............................................................................................................................................. i-2 Simbolos Usados En Este Manual .................................................................................................................... i-6 Symboles Utilises Dans Ce Manuel .................................................................................................................. i-7 Symbole ..............................................................................................................................................................

i-8 Symbols Used in this Manual ........................................................................................................................... i-5

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METRIC INFORMATION

Manual Organization Section I - Introduction N14 Page i-2 Manual Organization All references to engine components in this manual are divided into 22 specific groups. The organization is consistent with the service bulletins, service parts topics, and the parts catalogs for your convenience in updating your copy of the shop manual. Table of Contents The Table of Contents in the front of the manual contains a quick page reference for each group number. Group Contents Each group contains the following information: A ‘‘Section Contents’’ page at the beginning of each group to quickly aid in locating the information desired.

A Service Tools list with recommended tools needed to rebuild the components. General information to aid in rebuilding the component and an explanation of design change differences. Step-by-step rebuild instructions for disassembly, cleaning, inspection, and assembly of the component. Symbols which represent the action outlined in the instructions. The definitions of the symbols, listed in four languages (English, Spanish, French, and German), appear on pages i-5 through i-8. Index An alphabetical index is in the back of the manual to aid in locating specific information. Metric Information Both metric and U.S. customary values are used in this manual.

The metric value is listed first, followed by the U.S. customary in brackets. An example is 60°C [140°F].

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