AgPubs Service Repair Shop Manual for Cummins Diesel NH NT 855 CID Engines

1. Introduction to the Manual

This AgPubs Service Repair Shop Manual provides comprehensive technical information for the Cummins Diesel NH NT 855 CID series engines. It is designed to assist technicians and owners with detailed procedures for service, repair, and overhaul tasks, ensuring proper maintenance and functionality of the engine.

Understanding the different types of manuals available is crucial for effective use. This manual focuses on providing in-depth technical guidance.

2. Manual Types and Their Purpose

For each piece of equipment, various manual types are produced, each serving a specific purpose. Selecting the correct manual type is essential for your specific needs:

• Service Manual: This manual type, which includes this product, is dedicated to repair, overhaul, and troubleshooting procedures. It contains detailed instructions for disassembling, inspecting, repairing, and reassembling engine components.
• Operators Manual: Provides information on basic maintenance, operational procedures, fluid types, quantities, and routine adjustments necessary for daily operation.
• Parts Catalog: Features exploded views of components, part names, and factory (OEM) part numbers, which are essential for identifying and ordering replacement parts.

This AgPubs manual is a high-quality reproduction, designed for durability and clarity, often surpassing the condition of vintage original prints. It aims to prevent frustration and wasted time by providing accurate, factory-authored information.

3. Setup and Navigation

This manual is organized into sections covering various engine systems and components. To effectively use this manual:

1. Familiarize Yourself: Begin by reviewing the manual's overall structure to understand how information is categorized.
2. Identify Your Task: Determine whether you are performing a repair, an overhaul, or troubleshooting a specific issue.
3. Locate Relevant Section: Use the section headings and subheadings to navigate to the specific topic related to your task.
4. Consult Diagrams and Illustrations: Pay close attention to diagrams, exploded views, and illustrations, which provide visual guidance for procedures.

Figure 1: Front cover of the AgPubs Service Repair Shop Manual. This image displays the manual's cover, featuring the Cummins logo and indicating its purpose for NH/NT 855 C.I.D. Engines.

4. Operating Principles and Procedures

This service manual provides detailed instructions for various operational and repair procedures. When performing any task, always prioritize safety and follow all recommended steps precisely.

4.1. Repair and Overhaul

Detailed sections guide you through the repair and overhaul of engine components. This includes:

• Disassembly and assembly sequences.
• Inspection criteria and wear limits.
• Torque specifications for fasteners.
• Special tool requirements.

4.2. Maintenance Guidance

While a dedicated Operator's Manual covers basic maintenance, this service manual often includes maintenance procedures relevant to specific repair tasks or component longevity. Refer to the appropriate sections for:

• Component lubrication requirements.
• Adjustment procedures after repair.
• Recommended service intervals for overhauled parts.

5. Troubleshooting

This manual is an invaluable resource for diagnosing and resolving engine issues. The troubleshooting sections typically include:

• Symptom-based diagnostic charts.
• Step-by-step testing procedures for various systems (e.g., fuel, electrical, cooling).
• Information on common failures and their remedies.

Always follow the diagnostic flowcharts and testing procedures to accurately identify the root cause of a problem before attempting repairs.

6. Specifications

This section details the specific engine models covered by this manual and other relevant product specifications.

6.1. Covered 855 C.I.D. Engine Models (Worldwide)

The manual covers a wide range of Cummins 855 C.I.D. engine models across various applications, including both standard and new Big Cam versions. Refer to the table below for a comprehensive list:

Figure 2: Table of 855 C.I.D. Engine Models. This image displays a detailed table categorizing various Cummins 855 C.I.D. engine models by application (Automotive, Construction, Industrial, Locomotive, Rail Car, Fire Pump, Marine, Generator Set).

For clarity, a transcription of the models listed in Figure 2 is provided below:

6.2. Product Dimensions and Manufacturer

• Manufacturer: AgPubs
• Model Number: M-52704
• Package Dimensions: 11.25 x 9 x 1 inches
• Item Weight: 1 pound

7. Warranty Information

Specific warranty details for this reproduction manual are not provided in the product information. For inquiries regarding the manual's quality or reproduction, please contact AgPubs directly.

8. Support and Contact

For technical support related to the content of this manual or for assistance with specific engine issues, it is recommended to consult a certified Cummins service technician or refer to official Cummins documentation. For questions regarding the manual itself, please contact the manufacturer, AgPubs.