This web quest is to help you use resources to understand component function and purpose when used in an air brake system in a Class 8 trucks. 

You are tired of not finding the perfect truck for your application so you and two friends designed your own vehicle.  Now you have everything but an air system to control the brakes.  You have decided to use #24 cans on the front and 30 and 30/30 cans on the back axles. 

Gather information from major manufacturers and the Code of Federal Regulations to list quantities and parts numbers for components used in an air brake system up to the actuators and identify legally required components.  You will also draw a diagram showing the proper location in the system for the components.

Resources

   Government Printing Office  Use Tile 49 CFR 571.121

    Eaton Corporation  Manufacturer of components

    Meritor Automotive   Manufacturer of air brake systems

    Haldex Midland    Manufacturer of components

    Bendix Corporation    Manufacturer of components

    Brady Heavy Duty Truck Systems :Prentice Hall Publishers

     Freightliner service manuals

     Stopping the Big Rigs :Haldex Midland Corporation

The Process
 

1. The class will be broken down into groups of three.
2. Review the Web Quest and decide what type of class 8 truck you will build.
3. As a team, review  your class notes on air brake systems and using the Haldex Midland troubleshooting schematic, list the systems, i.e.. supply, primary, secondary, etc.
4. Divide the systems up between the team members.
5. List the components needed for each system.
6. Use the Government Printing Office web site to review the "121" law.
7. List the Federal Law requirements for each component.  Include section and subsection numbers.  An example is the minimum air tank size formula found in section 121 S5.1.2.1
8. Draw the complete system with each team member using a different color for each part of the system.  (Black for supply, Red for parking, Etc.)
9. Each team member will write a report for the part of the system they researched, detailing the function of each component selected and the operation of the system. 
10. The individual reports will be compiled to give a detailed description of the entire air brake system.

Evaluation

You will be evaluated by:

1. Your list of components and the description of each component.                                         50%
2. Your list of Regulations governing each component.                                                            15%
3. Your system diagram and location of components.                                                               25%
4. The neatness of the report including spelling, grammar, and proper siting of references.    10%

Conclusion

At the conclusion of this exercise, you will have an understanding of the various components used in an air brake system and how they work together.  You should also be able to follow most manufacture's schematics in the diagnosing and repair manuals.