Chapter 33 Heavy-duty Truck Trailers. Objectives (1 of 2) Describe what is meant by semi-trailers...
-
Upload
rose-venus -
Category
Documents
-
view
227 -
download
1
Transcript of Chapter 33 Heavy-duty Truck Trailers. Objectives (1 of 2) Describe what is meant by semi-trailers...
![Page 1: Chapter 33 Heavy-duty Truck Trailers. Objectives (1 of 2) Describe what is meant by semi-trailers and full trailers. Identify the various different tractor/trailer.](https://reader036.fdocuments.net/reader036/viewer/2022062308/56649cb15503460f94977038/html5/thumbnails/1.jpg)
Chapter 33
Heavy-duty Truck Trailers
![Page 2: Chapter 33 Heavy-duty Truck Trailers. Objectives (1 of 2) Describe what is meant by semi-trailers and full trailers. Identify the various different tractor/trailer.](https://reader036.fdocuments.net/reader036/viewer/2022062308/56649cb15503460f94977038/html5/thumbnails/2.jpg)
Objectives (1 of 2)
• Describe what is meant by semi-trailers and full trailers.
• Identify the various different tractor/trailer and train combinations.
• Describe what is meant by full frame, unibody, and monocoque.
• Explain the various types of hitching mechanisms used and their effects on tractor/trailer or train designation.
![Page 3: Chapter 33 Heavy-duty Truck Trailers. Objectives (1 of 2) Describe what is meant by semi-trailers and full trailers. Identify the various different tractor/trailer.](https://reader036.fdocuments.net/reader036/viewer/2022062308/56649cb15503460f94977038/html5/thumbnails/3.jpg)
Objectives (2 of 2)
• Describe the design characteristics of the dry van, reefer, flatbed, tanker, and other types of highway trailer.
• Explain the operating principles of a reefer trailer.
• Outline some common trailer maintenance practices.
![Page 4: Chapter 33 Heavy-duty Truck Trailers. Objectives (1 of 2) Describe what is meant by semi-trailers and full trailers. Identify the various different tractor/trailer.](https://reader036.fdocuments.net/reader036/viewer/2022062308/56649cb15503460f94977038/html5/thumbnails/4.jpg)
Types of Trailers
![Page 5: Chapter 33 Heavy-duty Truck Trailers. Objectives (1 of 2) Describe what is meant by semi-trailers and full trailers. Identify the various different tractor/trailer.](https://reader036.fdocuments.net/reader036/viewer/2022062308/56649cb15503460f94977038/html5/thumbnails/5.jpg)
Semi-trailer
![Page 6: Chapter 33 Heavy-duty Truck Trailers. Objectives (1 of 2) Describe what is meant by semi-trailers and full trailers. Identify the various different tractor/trailer.](https://reader036.fdocuments.net/reader036/viewer/2022062308/56649cb15503460f94977038/html5/thumbnails/6.jpg)
B-Train
![Page 7: Chapter 33 Heavy-duty Truck Trailers. Objectives (1 of 2) Describe what is meant by semi-trailers and full trailers. Identify the various different tractor/trailer.](https://reader036.fdocuments.net/reader036/viewer/2022062308/56649cb15503460f94977038/html5/thumbnails/7.jpg)
Full Trailer
![Page 8: Chapter 33 Heavy-duty Truck Trailers. Objectives (1 of 2) Describe what is meant by semi-trailers and full trailers. Identify the various different tractor/trailer.](https://reader036.fdocuments.net/reader036/viewer/2022062308/56649cb15503460f94977038/html5/thumbnails/8.jpg)
A-Train
![Page 9: Chapter 33 Heavy-duty Truck Trailers. Objectives (1 of 2) Describe what is meant by semi-trailers and full trailers. Identify the various different tractor/trailer.](https://reader036.fdocuments.net/reader036/viewer/2022062308/56649cb15503460f94977038/html5/thumbnails/9.jpg)
Converter Dolly
![Page 10: Chapter 33 Heavy-duty Truck Trailers. Objectives (1 of 2) Describe what is meant by semi-trailers and full trailers. Identify the various different tractor/trailer.](https://reader036.fdocuments.net/reader036/viewer/2022062308/56649cb15503460f94977038/html5/thumbnails/10.jpg)
Gooseneck
![Page 11: Chapter 33 Heavy-duty Truck Trailers. Objectives (1 of 2) Describe what is meant by semi-trailers and full trailers. Identify the various different tractor/trailer.](https://reader036.fdocuments.net/reader036/viewer/2022062308/56649cb15503460f94977038/html5/thumbnails/11.jpg)
Unibody
![Page 12: Chapter 33 Heavy-duty Truck Trailers. Objectives (1 of 2) Describe what is meant by semi-trailers and full trailers. Identify the various different tractor/trailer.](https://reader036.fdocuments.net/reader036/viewer/2022062308/56649cb15503460f94977038/html5/thumbnails/12.jpg)
C-Train
![Page 13: Chapter 33 Heavy-duty Truck Trailers. Objectives (1 of 2) Describe what is meant by semi-trailers and full trailers. Identify the various different tractor/trailer.](https://reader036.fdocuments.net/reader036/viewer/2022062308/56649cb15503460f94977038/html5/thumbnails/13.jpg)
Cargo Vans
![Page 14: Chapter 33 Heavy-duty Truck Trailers. Objectives (1 of 2) Describe what is meant by semi-trailers and full trailers. Identify the various different tractor/trailer.](https://reader036.fdocuments.net/reader036/viewer/2022062308/56649cb15503460f94977038/html5/thumbnails/14.jpg)
Reefer (1 of 2)
![Page 15: Chapter 33 Heavy-duty Truck Trailers. Objectives (1 of 2) Describe what is meant by semi-trailers and full trailers. Identify the various different tractor/trailer.](https://reader036.fdocuments.net/reader036/viewer/2022062308/56649cb15503460f94977038/html5/thumbnails/15.jpg)
Reefer (2 of 2)
![Page 16: Chapter 33 Heavy-duty Truck Trailers. Objectives (1 of 2) Describe what is meant by semi-trailers and full trailers. Identify the various different tractor/trailer.](https://reader036.fdocuments.net/reader036/viewer/2022062308/56649cb15503460f94977038/html5/thumbnails/16.jpg)
Flat-Bed
![Page 17: Chapter 33 Heavy-duty Truck Trailers. Objectives (1 of 2) Describe what is meant by semi-trailers and full trailers. Identify the various different tractor/trailer.](https://reader036.fdocuments.net/reader036/viewer/2022062308/56649cb15503460f94977038/html5/thumbnails/17.jpg)
Dump Trailers
![Page 18: Chapter 33 Heavy-duty Truck Trailers. Objectives (1 of 2) Describe what is meant by semi-trailers and full trailers. Identify the various different tractor/trailer.](https://reader036.fdocuments.net/reader036/viewer/2022062308/56649cb15503460f94977038/html5/thumbnails/18.jpg)
Tankers
![Page 19: Chapter 33 Heavy-duty Truck Trailers. Objectives (1 of 2) Describe what is meant by semi-trailers and full trailers. Identify the various different tractor/trailer.](https://reader036.fdocuments.net/reader036/viewer/2022062308/56649cb15503460f94977038/html5/thumbnails/19.jpg)
Shop Talk
• For optimum brake performance and safety, both wheel ends of each axle must have the same type of lining and drum equipment.
• If the trailer has tandem axles, both axles must also have the same type of wheel equipment.
• The vehicle brake-lining thickness must be the same on each brake shoe and on each side of the axle.
• When brake linings are 1/4 inch in thickness or less at their thinnest point, they should be replaced.
![Page 20: Chapter 33 Heavy-duty Truck Trailers. Objectives (1 of 2) Describe what is meant by semi-trailers and full trailers. Identify the various different tractor/trailer.](https://reader036.fdocuments.net/reader036/viewer/2022062308/56649cb15503460f94977038/html5/thumbnails/20.jpg)
Shop Talk
• One of the weight-savers now being used as an option by some trailer OEMs is fiber composite springs
• They can save up to 50 pounds per spring, and can outlast steel springs.
• Although the initial cost is around four times that of steel springs, they can last the life of the trailer, so they are ultimately, an economical choice.
![Page 21: Chapter 33 Heavy-duty Truck Trailers. Objectives (1 of 2) Describe what is meant by semi-trailers and full trailers. Identify the various different tractor/trailer.](https://reader036.fdocuments.net/reader036/viewer/2022062308/56649cb15503460f94977038/html5/thumbnails/21.jpg)
Landing Gear
![Page 22: Chapter 33 Heavy-duty Truck Trailers. Objectives (1 of 2) Describe what is meant by semi-trailers and full trailers. Identify the various different tractor/trailer.](https://reader036.fdocuments.net/reader036/viewer/2022062308/56649cb15503460f94977038/html5/thumbnails/22.jpg)
Trailer Lighting (1 of 2)
![Page 23: Chapter 33 Heavy-duty Truck Trailers. Objectives (1 of 2) Describe what is meant by semi-trailers and full trailers. Identify the various different tractor/trailer.](https://reader036.fdocuments.net/reader036/viewer/2022062308/56649cb15503460f94977038/html5/thumbnails/23.jpg)
Trailer Lighting (2 of 2)
• See Table 33-1 on page 1092 of textbook.
![Page 24: Chapter 33 Heavy-duty Truck Trailers. Objectives (1 of 2) Describe what is meant by semi-trailers and full trailers. Identify the various different tractor/trailer.](https://reader036.fdocuments.net/reader036/viewer/2022062308/56649cb15503460f94977038/html5/thumbnails/24.jpg)
Reflective Tape
![Page 25: Chapter 33 Heavy-duty Truck Trailers. Objectives (1 of 2) Describe what is meant by semi-trailers and full trailers. Identify the various different tractor/trailer.](https://reader036.fdocuments.net/reader036/viewer/2022062308/56649cb15503460f94977038/html5/thumbnails/25.jpg)
Shop Talk
• The entire body shell in a unibody van trailer is the frame. If any body component is damaged the structural integrity of the frame is at risk.
• A slightly damaged floor or out-of-square doorframe can be an indication of a much more serious problem.
![Page 26: Chapter 33 Heavy-duty Truck Trailers. Objectives (1 of 2) Describe what is meant by semi-trailers and full trailers. Identify the various different tractor/trailer.](https://reader036.fdocuments.net/reader036/viewer/2022062308/56649cb15503460f94977038/html5/thumbnails/26.jpg)
Caution
• High modern power wash equipment can produce high impact water jets.
• Take care when using it on trailer panels and tanker skins because it can indent or cause abrasive damage.
![Page 27: Chapter 33 Heavy-duty Truck Trailers. Objectives (1 of 2) Describe what is meant by semi-trailers and full trailers. Identify the various different tractor/trailer.](https://reader036.fdocuments.net/reader036/viewer/2022062308/56649cb15503460f94977038/html5/thumbnails/27.jpg)
Summary (1 of 6)
• A semi-trailer is a trailer in which a portion of the trailer weight is supported by the tow unit— either a tractor or a lead trailer.
• A full-trailer is any trailer in which the trailer weight is self-supported and the unit is towed by a tractor or lead trailer by means of a hook and drawbar assembly.
• A semi-trailer can be converted to a full-trailer by means of a converter dolly.
• A train is a combination of a tractor and multiple trailers.
![Page 28: Chapter 33 Heavy-duty Truck Trailers. Objectives (1 of 2) Describe what is meant by semi-trailers and full trailers. Identify the various different tractor/trailer.](https://reader036.fdocuments.net/reader036/viewer/2022062308/56649cb15503460f94977038/html5/thumbnails/28.jpg)
Summary (2 of 6)
• An A-train double consists of a tractor, semi-lead trailer, and full-pup trailer.
• A B-train double consists of a tractor, semi-lead trailer, and semi-pup trailer.
• A C-train double uses a rigid double drawbar and converter dolly to attach the pup trailer.
• Many van trailers use a unibody or monocoque frame.
![Page 29: Chapter 33 Heavy-duty Truck Trailers. Objectives (1 of 2) Describe what is meant by semi-trailers and full trailers. Identify the various different tractor/trailer.](https://reader036.fdocuments.net/reader036/viewer/2022062308/56649cb15503460f94977038/html5/thumbnails/29.jpg)
Summary (3 of 6)
• A unibody frame is essentially a shell in which all of the shell components play a role in the frame dynamic, including the floor, side panels, bulkhead, doors, and roof.
• The van trailer is the most common truck trailer on North American roads.
• There are two ways to obtain light weight without sacrificing strength. – One is by using lighter, more expensive materials
such as aluminum and high-strength steel in posts and crossmembers.
– The other is to use wall posts and floor cross-members that have a deeper section.
![Page 30: Chapter 33 Heavy-duty Truck Trailers. Objectives (1 of 2) Describe what is meant by semi-trailers and full trailers. Identify the various different tractor/trailer.](https://reader036.fdocuments.net/reader036/viewer/2022062308/56649cb15503460f94977038/html5/thumbnails/30.jpg)
Summary (4 of 6)
• A 1-inch increase in the width of a 53-foot trailer often makes the difference between getting two pallets side by side or not.
• Freight vans are probably the most widely used trailer model in operation.
• Modern refrigerated trailers or insulated vans are dry freight vans that are completely insulated and have a reefer unit usually located at the front or nose of the trailer.
![Page 31: Chapter 33 Heavy-duty Truck Trailers. Objectives (1 of 2) Describe what is meant by semi-trailers and full trailers. Identify the various different tractor/trailer.](https://reader036.fdocuments.net/reader036/viewer/2022062308/56649cb15503460f94977038/html5/thumbnails/31.jpg)
Summary (5 of 6)
• In addition to vans, there are several trailer types and designs. – One of the most common types is the platform or
flatbed trailer. • The number of axles and tires used with each trailer
design depends on the rated load it is intended to carry.
• There are two basic designs of tank trailers: liquid (wet) haulers and dry-bulk haulers.
• Landing gear damage often results from driver and yard jockey abuse especially during coupling and uncoupling.
![Page 32: Chapter 33 Heavy-duty Truck Trailers. Objectives (1 of 2) Describe what is meant by semi-trailers and full trailers. Identify the various different tractor/trailer.](https://reader036.fdocuments.net/reader036/viewer/2022062308/56649cb15503460f94977038/html5/thumbnails/32.jpg)
Summary (6 of 6)
• Trailer wheel and tire designs are generally interchangeable between tractors and trailers.
• Trailer slide tandems allow the load bridge formula to be altered; they increase flexibility, maneuverability, and ability to meet weight laws.
• Trailers must be serviced on regular preventive maintenance schedules: service schedules may be based on hubdometer mileage or in applications that are used intermittently, by calendar.