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Chapter 1

Chapter 1. Introduction to Servicing Heavy-Duty Truck Systems. Objectives. Explain the basic truck classifications. Define gross vehicle weight (GVW). Identify the major original equipment manufacturers (OEMs). Classify a truck by the number of axles it has. ( Objectives cont.).

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Chapter 1

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  1. Chapter 1 Introduction to Servicing Heavy-Duty Truck Systems

  2. Objectives Explain the basic truck classifications. Define gross vehicle weight (GVW). Identify the major original equipment manufacturers (OEMs). Classify a truck by the number of axles it has.

  3. ( Objectives cont.) Identify an on-highway truck’s major systems and its related components. Identify various career opportunities in the heavy-duty trucking industry. Explain the job classifications offered by the truck industry to qualified and experienced technicians.

  4. TRUCK CLASSIFICATIONS • GVW is the weight of a • vehicle plus its freight • GVWR is the maximum • allowable weight of the • vehicle plus the weight • of the load it can carry. • There are three classes • of light and medium duty, • and two classes of heavy • duty trucks. (pg2)

  5. OEM’s • There are four major medium and heavy duty truck manufactures in North America. • Diamler AG: Freightliner, Western Star • DAF-Paccar: Peterbilt, Kenworth • International Trucks: Navistar • Volvo-Mack: Mack Trucks, Volvo Trucks

  6. Axle Classifications • The first number refers to the total number of wheel sets, and the second to the number that are driven. • 4x4: 4 wheels 4 driven • 6x4: 6 wheels 4 driven • 4x2: 4 wheels 2 driven • 4x6: piece of lumber • 2x4: piece of lumber

  7. Vocational Trucks.

  8. Tractor Trailer Combo

  9. Transport Refrigeration

  10. Trailers • What is the difference between a semi-trailer and a full-trailer? • What are multimodal transportation systems? • What are “reefers”?

  11. Class 8 heavy-duty truck. Components

  12. New trucks are powered by Diesel Engines

  13. Automatic Transmissions

  14. Axles / Differentials

  15. Suspension Systems

  16. Brakes

  17. Fifth Wheel

  18. Large Fleet Shop

  19. Fleet Operation Terminology • Logistics • Linehaul • JIT • LTL • P&D • Courier fleets • DCC • Vocational • Renting and Leasing • O/O (pg10)

  20. Dealership Shop

  21. Independent Service Shop

  22. Summary Trucks are classified by their gross vehicle weight (GVW), the weight of the vehicle plus its load, and by the number of axles they have. Heavy-duty trucks have a GVW of 26,001 pounds or more.

  23. Summary (cont.) A successful heavy-duty truck technician must be able to maintain good customer relations and working relations, use effective communications skills, maintain a safe work environment, perform preventive maintenance, use tools and equipment properly, troubleshoot, correct problems by repairing or replacing, and upgrade skills and knowledge continuously.

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