Truck Trailer
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PLAYSKOOL MB BIGFOOT MONSTER TRUCK COMPLETE TRAILER SST BOXED BIG FOOT VGC |  |
0 Bid | US $47.41 | 6h 24m |
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collectible toy semi truck w grain trailer | |
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US $55.00 | 21d 15h 43m |
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vintage 1960s WANNATOY tractor trailer TRUCK soft plastic EX complete TRI COLOR | |
0 Bid | US $4.00 | 12h 22m |
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VINTAGE TIN IML TRUCKING COMPANY DOUBLE TRAILER SET | |
1 Bid | US $44.99 | 13h 29m |
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Vintage Folk Art Tractor Trailer Truck | |
0 Bid | US $49.47 | 13h 33m |
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Wooden Toy Truck and Trailer Advertising Memorabilia | |
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US $15.00 | 15h 54m |
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Vintage Line Mar Tin Toy Truck and Trailer | |
8 Bids | US $6.00 | 1d 3h 35m |
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VINTAGE PRESSED STEEL TRUCK TRAILER PRODUCE VAN | |
3 Bids | US $13.49 | 1d 6h 11m |
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Old Tin WYANDOTTE Van Lines TRUCK TRAILER Vintage Pressed Steel Toy | |
3 Bids | US $10.98 | 1d 13h 9m |
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Lido Vintage lot of 4 Car Truck Vehicle Trailer Truck Convertible | |
0 Bid | US $5.99 | 1d 14h 6m |
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TIN FRICTION TRUCK TRAILER ALLIED VAN LINES VINTAGE 50S OR 60S IN BOX | |
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US $199.99 | 1d 16h 58m |
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VINTAGE TOY TRUCK WESTERN AUTO TRACTOR TRAILER RARE FIND | |
2 Bids | US $36.00 | 12h 22m |
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Tri ang Minic Super Rare Truck and Trailer British Insulated Cables loadMINT | |
0 Bid | US $399.00 | 12h 58m |
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2010 HESS TOY JET AIRPLANE CARRIER TRACTOR TRAILER TRUCK | |
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US $22.99 | 18d 19h 49m |
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VINTAGE GAY TOYS TRUCK TRAILER 979 AL UNSER RACECAR 706 MADE IN USA LK | |
2 Bids | US $11.50 | 3h 43m |
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11231125 Windshield and dome for Structo Horse Truck Tractor Trailer | |
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US $45.00 | 29d 7h 33m |
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Vintage Buddy L STP Oil Tractor Trailer Truck with Flatbed Trailer NICE ITEM | |
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US $14.99 | 27d 3h 29m |
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VtgToy Semi Truck Pet Milk Tin Ertl Tractor Trailer Dairy Products | |
1 Bid | US $16.00 | 2d 4h 52m |
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VINTAGE GRIMLAND TIN TOY TRUCK TRAILER ALLIED VAN LINES | |
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US $199.95 | 27d 11h 23m |
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Tonka metal Truck Trailer Lowboy Loader Crane State HiWay Dept 975 price lowered | |
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US $600.00 | 28d 2h 57m |
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Vintage ERTL Semi Truck w Trailer | |
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US $20.00 | 25d 10h 30m |
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RARE FRICTION TIN TRUCK TRAILER BEKINS MOVING AND STORAGE TRUCK TWO TRAILERS | |
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US $749.95 | 27d 11h 51m |
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VINTAGE WOODEN TOY TRUCK W FLATBED TRAILER | |
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US $14.95 | 26d 5h 26m |
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Vintage Buddy L Promotional GOODYEAR TIRES Trailer Truck Flatbed Trailer | |
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US $8.99 | 27d 3h 29m |
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Vintage Rare Collectible Russian Toy Truck With Trailer Mir | |
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US $68.00 | 26d 12h 22m |
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VINTAGE WYANDOTTE VALLEY FARMS LIVESTOCK TRAILER TRUCK | |
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US $45.00 | 26d 3h 49m |
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VINTAGE STRUCTO FARMS GREEN TOY TRUCK TRAILER | |
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US $225.00 | 24d 7h |
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1956 Custom Tonka Farms Truck Tanker Trailer CUSTOM BUILT | |
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US $325.00 | 24d 7h 33m |
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Large tinplate litho truck double axle trailer car7b | |
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US $1,200.00 | 24d 9h 40m |
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MSB GDR 125 PETERBILT CABIN TRUCK RENAULT ALPINE Car Trailer MIB`78 RARE | |
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US $69.99 | 23d 20h 31m |
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Vintage Auburn Rubber Truck Bed Trailer Wagon Buckboard for Parts or Repair | |
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US $9.00 | 22d 10h 48m |
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TONKA YOUNKERS SEMI TRACTOR TRAILER TRUCK DECAL SET BIG J TOYS THE BEST | |
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US $20.00 | 20d 3h 43m |
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Marx 1953 Trailer Truck | |
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US $145.00 | 22d 6h 49m |
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1930s Kingsbury Truck Trailer Wind up w Rubber Tires | |
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US $199.95 | 21d 8h 18m |
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REVISED 04 15 ORIGINAL NYLINT TOY TRUCK U HAUL RENTAL TRAILER BOX W TRAILER | |
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US $225.00 | 20d 15h 52m |
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VINTAGE LARGE 21x7 METAL CANADIAN TIRE TONKA TRUCK TRAILER EX CONDITION | |
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US $279.99 | 21d 11h 15m |
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STRUCTO NORTH AMERICAN VAN LINES TRACTOR TRAILER RIG PRESSED STEEL SEMI TRUCK | |
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US $149.99 | 18d 13h 42m |
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Vintage Keystone Wood Semi Tractor Trailer Truck Keystone Trucking Company | |
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US $20.00 | 16d 14h 56m |
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Vintage Pacific Lines Ocean Liner Toy Truck Trailer with Moving Doors | |
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US $4.99 | 18d 4h 40m |
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Vintage Tonka Farms Truck and Horse Trailer | |
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US $199.00 | 17d 11h 25m |
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Truck and Trailer Equipment - Attaching a Semi Trailer to a Road Tractor
How is a road tractor connected to a semi-trailer? The attachment between the tractor and the trailer is made by two connecting devices. One is the "fifth wheel" that is mounted on the rear frame of the road tractor. The other is called the "kingpin", which is located on the front end of the truck trailer.
What is a Fifth-Wheel?
Originally, a fifth wheel was a steering mechanism resembling a wheel that enabled the front axle of a horse-drawn wagon to rotate when making turns. Around 1910, John C. Endebrock invented a device for coupling trailers to motor vehicles. In its initial use, trailers were towed by Ford Model "T" passenger cars. This coupling scheme required three men to hook to and unhook the trailer from the automobile. In 1918, Endebrock designed a new coupling devise that allowed a single driver to easily connect the tractor and the trailer. The new fifth wheel design used a jaw with a spring locking device mounted on the fifth wheel plate that was attached to the tractor frame.
Today, the fifth wheel serves as a coupling device that attaches a road tractor to a semi-trailer. A fifth wheel is a heavy metal disc with a "V" shaped slot. It is attached horizontally to the chassis above the rear axles of the road tractor. The "V" slot is located at the rear and it contains a locking device. The fifth wheel mechanism used to connect tractors and trailers today is very similar to Endebrock's design from the early twentieth century.
What is a Kingpin?
A kingpin is a heavy metal cylindrical pin that is located underneath the front end of the trailer. The kingpin is the mechanism on the trailer that locks it to a road tractor. It is typically positioned between 18" to 48" from the trailer nose. A greased metal grid plate surrounds the kingpin. This grid plate allows the fifth wheel to slide underneath the trailer. When the tractor is backed into the nose of a trailer, the fifth wheel pivots and slides underneath the trailer's grid plate. The fifth wheel then locks onto the trailer's king pin.
When coupled to the kingpin, the fifth wheel enables the semi trailer to rotate at the point where the fifth wheel and kingpin are joined. The rotating attachment allows the tractor-trailer combination to make turns and provides stability and maneuverability on the road. When the load is delivered, the driver disconnects the tractor from the trailer by rolling down the trailer's dolly legs. He then pulls a lever to disengage the fifth wheel locking mechanism and drives the tractor away from the trailer.
For more information about semi-trailers, see American Trailer Exchange
About the Author
Greg Pratt has enjoyed a 33-year career in the semi-trailer sales and leasing business. He developed and managed a 20,000 unit trailer leasing company; managed a multi-branch trailer marketing firm; and, successfully liquidated trailer lease portfolios for investment firms, banks and equipment leasing companies. He founded American Trailer Exchange in 1992. Greg is considered by many in the trucking and equipment finance industries to be an expert in his field. He is often consulted for equipment valuations and industry market trends.
Greg has an M.B.A degree from Roosevelt University-Chicago, and a B.S. degree from Ball State University.
Greg lives in the Atlanta, Georgia area with his wife and five children. He has lead worship bands, and plays the trumpet. He has taught courses on conflict resolution, leadership training and team building. He enjoys playing basketball and running in 5K and 10K races.
For more business information visit: www.amtrex.net
