Question: When Backing A Tractor Under A Trailer You Should?

When backing a tractor under a trailer you should expect?

Before backing the tractor under the trailer, adjust the landing gear to position the trailer at the proper height. The trailer should be just low enough that it will be raised slightly by the tractor when the tractor backs under it.

When backing up under a trailer you should line up?

4. When you get ready to back under the semi trailer you should line up: A About 12 degrees off the line of the trailer.

When lowering the landing gear you should?

When operating the landing gear, use two hands and square feet up to handle. When lowering and raising the landing gear, ensure it is in the proper gear. When the trailer is loaded, the landing gear should be in low gear.

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What might happen if the trailer is too high?

What might happen if the trailer is too high when you try to couple? If the trailer is too low, the tractor may stike and damage the trailer nose; if the trailer is too high, it may not couple correctly. If there is space something is wrong and the trailer would come loose very easily.

What happens when you cross the air lines of an older trailer without spring brakes?

You cross the air lines when hooking up to an old trailer. What will happen? If the trailer has no spring brakes, you could drive away buy you wouldn’t have trailer brakes. In normal driving, some drivers use the trolley (hand) valve before the brake pedal in order to prevent trailer skids.

What will happen if the service air line between the tractor and the trailer comes apart?

Trailer emergency brakes to come on. 15. If the service air line comes apart while you are driving a combination vehicle but the emergency line stays together, what will happen right away? The emergency tractor brakes will come on.

What should you do to stop a trailer skid?

What is the first thing you should do to prevent a trailer skid? Step on the brakes hard several times to stop the skid. Recognize that a skid has started to occur in the mirrors. Use the trailer hand brake.

When backing up your tractor while coupling it to a trailer the trailer brakes should be?

Before backing your tractor under the trailer while coupling, make sure your trailer brakes are locked.

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What part of the kingpin should the locking jaws?

Which part of the kingpin should the locking jaws close around? When you get ready to back under the semi trailer you should line up: Directly in front of the trailer. How should you test the tractor semi trailer connection for security?

When you are uncoupling a loaded trailer you should lower the landing gear until it?

Step 4. Lower the Landing Gear. If trailer is empty, lower the landing gear until it makes firm contact with the ground. If trailer is loaded, after the landing gear makes firm contact with the ground, turn crank in low gear a few extra turns.

What is the safest way to lower and raise your trailer landing gear in high gear?

Consider the following safe cranking guidelines to ensure proper, low-stress raising and lowering of the landing gear:

  1. Stand parallel to the trailer when cranking. Resistance is at its highest during the raising of the gear.
  2. Face the trailer when lowering the trailer.

What color is the supply line on a tractor trailer?

Generally these lines are color coded where the service line is blue and the supply line is red. If the trailer connectors are not color coded, then both are usually black or silver and the emergency line will connect to the receptacle closest to the driver’s side on the front of the trailer.

What does drop hook mean?

“ Drop-and-hook ” is the trucking industry’s term for when a driver drops a full container at a facility and hooks their tractor to a pre-loaded trailer at the same facility.

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What is coupling on a tractor trailer?

The coupling consists of a kingpin, a 2-or-3 12-inch-diameter (50.8 or 88.9 mm) vertical steel pin protruding from the bottom of the front of the semi – trailer, and a horseshoe-shaped coupling device called a fifth wheel on the rear of the towing vehicle. The advantage of this type of coupling is towing stability.

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