Service Manual
Signature, ISX, and QSX15
Volume 2
Service Manual
Signature, ISX, and QSX15
Volume 2
Copyright© 2011 Bulletin 3666239
Cummins Inc. Printed 02-MAY-2011
All rights reserved
Foreword
This manual contains instructions for troubleshooting and repairing this engine in the chassis, complete rebuild
procedures and specifications. Disassembly, cleaning, inspection, and assembly instructions are included. A listing
of accessory and component suppliers is located in Section M - Component Manufacturers. Suppliers can be
contacted directly for any information not covered in this manual.
Read and follow all safety instructions. Refer to the WARNING in the General Safety Instructions in Section i
- Introduction.
The manual is organized to guide a service technician through the logical steps of identifying and correcting problems
related to the engine. This manual does not cover vehicle or equipment problems. Consult the vehicle or equipment
manufacturer for repair procedures.
The repair procedures in this manual are based on the engine or component removed from chassis. 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 (for example: Troubleshooting and Repair, Specifications, and Alternative Repair)
are available and can be ordered by Contacting your local area Cummins Regional office. A Cummins Regional office
listing is located in Service Literature (Section L).
Cummins Inc. encourages the user of this manual to report errors, omissions, and recommendations for improvement.
Please use the postage paid, pre-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 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 or call 1-800-DIESELS
(1-800-343-7357) toll free in the U.S. and Canada.
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® exchange parts.
Table of Contents
Section
Introduction .............................................................................................................................................. i
Fuel System - Group 05 ........................................................................................................................... 5
Injectors and Fuel Lines - Group 06 ........................................................................................................ 6
Lubricating Oil System - Group 07 .......................................................................................................... 7
Cooling System - Group 08 ...................................................................................................................... 8
Drive Units - Group 09 .............................................................................................................................. 9
Air Intake System - Group 10 ................................................................................................................... 10
Exhaust System - Group 11 ..................................................................................................................... 11
Compressed Air System - Group 12 ........................................................................................................ 12
Electrical Equipment - Group 13 .............................................................................................................. 13
Engine Testing - Group 14 ....................................................................................................................... 14
Mounting Adaptations - Group 16 ............................................................................................................ 16
Vehicle Braking - Group 20 ...................................................................................................................... 20
Service Literature ..................................................................................................................................... L
Specifications ........................................................................................................................................... V
Back .......................................................................................................................................................... back
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Cummins Signature/ISX/QSX15 Engines OEM Service & Repair Manual
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Description
Cummins Signature/ISX/QSX15 Engines OEM Service & Repair Manual is a comprehensive guide designed for maintaining, servicing, diagnosing, and repairing your vehicle. Widely used by dealership technicians, professional mechanics, and DIY enthusiasts alike, this manual is tailored to meet the needs of modern Cummins engines with updated OEM standards.
This detailed manual features an introduction that covers the proper usage of the manual, explains symbols and illustrations, and provides essential safety, repair, and cleaning instructions along with a full list of acronyms and abbreviations. It also offers extensive information on engine and system identification, familiarization with key engine components, and troubleshooting procedures.
- Introduction
- About the Manual
- How to Use the Manual
- Symbols
- Illustrations
- General Safety Instructions
- General Repair Instructions
- General Cleaning Instructions
- Acronyms and Abbreviations
- Engine and System Identification
- Engine Identification
- Engine Diagrams
- Familiarization
- Complete Engine - Overview
- Cylinder Block - Overview
- Cylinder Head - Overview
- Rocker Levers - Overview
- Fuel System - Overview
- Flow Diagram, Fuel System
- Injectors and Fuel Lines - Overview
- Lubricating Oil System - Overview
- Flow Diagram, Lubricating Oil System
- Cooling System - Overview
- Flow Diagram, Cooling System
- Air Intake System - Overview
- Flow Diagram, Air Intake System
- Exhaust System - Overview
- Flow Diagram, Exhaust System
- Compressed Air System - Overview
- Flow Diagram, Compressed Air System
- Electrical Equipment - Overview
- Engine Testing - Overview
- Vehicle Braking - Overview
- Troubleshooting Symptoms
- Troubleshooting Procedures and Techniques
- Troubleshooting Symptoms Charts
- Air Compressor Air Pressure Rises Slowly
- Air Compressor Cycles Frequently
- ... (and many more)
- Stationary Regeneration
- Stationary Regeneration - Will Not Complete
- Troubleshooting Overview
- Troubleshooting Symptoms (New Format)
- Engine Performance Troubleshooting Tree - Signature and ISX CM870
- Engine Performance Troubleshooting Tree - ISX with CM871
- Fuel Economy Troubleshooting Tree
- Vibration Excessive
Whether you are addressing engine performance issues, fuel economy concerns, or dealing with specific symptoms such as excessive vibration, this manual provides step‐by‐step troubleshooting trees and charts to guide you through the diagnostic and repair processes with precision and up-to-date technical information.
