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Parts, Service & Support

Tools and Wizards

In this section, you'll find a part number cross-reference tool, parts and service literature, service locations, and answers to frequently asked questions.  The tools and wizards will help you fill in all necessary information to locate the right tune-up kit and application for your truck's Jake Brake®.  You may also use our Part Number Cross-Reference tool to cross-reference a specific part number or print off a complete list by manufacturer.

A complete list of cross-referenced part numbers by manufacturer can be accessed through the manufacturer links below.

Find parts, service and literature for OEMs Caterpillar, Mack, Renault and more.

Tune-Up Kit Wizard

Part Number Cross Reference

If you would like a complete list of cross-referenced part numbers by manufacturer, please click on the appropriate manufacturer below:

Application Wizard

Authorized Distributors click here for IMS parts listing work instructions.

4X2 or 4X6. If you have 4X4 or 6X6 contact tech services.

530 With AVNT Includes:
0012NMZ HT530 340HP/345HP PEAK 2100 GOV
0012NNP HT530 320HP/325HP PEAK 2100 GOV
0012NNR HT530 300HP/315HP PEAK 2200 GOV
0012NNS HT530 280HP/292HP PEAK 2200 GOV

Parts & Service Literature

Service Letters (by Number)

How A Jake Brake Works

How A Jake Brake Works

Watch our "How It Works" video to learn more about engine braking.

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What's New for 2018

Learn about the latest engine brake technology & updates.


Our Story

Although the Jacobs Engine Brake has been on the market since 1961, the need for it was terrifyingly demonstrated to its inventor Clessie L. Cummins, some thirty years earlier. In August of 1931, himself, Ford Moyer, and Dave Evans driving a Cummins diesel powered Indiana truck from New York to Los Angeles...

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Have a Question?

Have you looked at our Frequently Asked Questions? While we would like to hear from you, it is possible that your question can be answered more quickly if you visit our FAQs.


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Engine Brake Trouble?

Download our Technician Guide for Jake Brake Troubleshooting information.


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Purchase exclusive Jacobs Vehicle Systems branded merchandise as well as tools for Jacobs technologies.

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