The unit begins with a brief online lesson to familiarize you with the procedures for backing maneuvers and to explain the precautions required for backing safely. The rest of the unit covers higher level backing theory. Show
What You Will Learn:Backing Principles and Rules
Four Basic Backing Maneuvers
Lesson 01: Principles of Backing Tractor-TrailersThis unit will introduce driver-trainees to the Combination Vehicle Driver Training Curriculum and the components of a combination vehicle. Tip: These videos are not supported in Internet Explorer. Try another browser; Chrome, Firefox, iphone, Android... Principles of Backing Tractor-TrailersThere are two important terms you need to know while backing which relate to your steering activity with the tractor. They are "jacking" and "chasing." Jacking (i.e., jackknifing)Jacking is employed to change the direction that the trailer wheels are following; that is, you make the trailer jack to the right or to the left depending upon the path you want the trailer to take. The trailer will "jack" in the direction that you turn the steering wheel. If you want the trailer to jack to the right, then turn the wheel to the right. Chasing (i.e., following the trailer)Once the tractor has "jacked" the trailer into the path (direction) desired, you then must chase the trailer through its path for as long as you desire the trailer to follow that path. You do that the same way you kept the trailer in a straight path in "Unit 1.4, Basic Control". If the trailer begins to drift off of the curved path, you turn the wheel away from the drift. For example, if the trailer drifts to the left, you turn the wheel to the right. Jacking and chasing are two terms you will be hearing over and over again from your instructor while he or she is teaching you the principles of backing. When the instructor says, "O.K., now give it some jack," he or she is telling you to change the direction of the trailer's path. You do this with the tractor its true, but you are actually steering the trailer. This is why the rear tractor axle is referred to as the "steering" axle when you're in reverse. When the instructor says, "O.K., now chase it," he or she is telling you that you have now "steered" the trailer into the desired path. Then you must "chase" the trailer along that path. Failure to do so immediately will result in the trailer continuing to jack past the intended path. If you fail to chase it, eventually your rig will end in a full jackknife with the trailer against the side of the cab. WhenAll jacking and chasing is a matter of when (timing) and how much steering input). If you jack too soon or too late the trailer doesn't steer into the path you want it too. Similarly, if you're too late or too soon in chasing, the trailer will not continue along the desired path. How much--Too much or too little a turn on the steering wheel will start the trailer in the wrong direction. Steering too much or too little, chasing the trailer will cause it to go off course. Lesson 02: Straight Line BackingEvery backing maneuver starts and finishes with a straight line. Tip: These videos are not supported in Internet Explorer. Try another browser; Chrome, Firefox, iphone, Android... Backing the Tractor-Trailer in Straight Line Checklist1. Put vehicle in position by moving forward until tractor-trailer is aligned and front wheels are straight. 2. Put vehicle in reverse.
3. Constantly check behind when backing.
4. Steering 5.Pull up and start again if too far out of position.
Download the Straight Line Backing Checklist Lesson 03: Parallel Park- Blind Side
Tip: These videos are not supported in Internet Explorer. Try another browser; Chrome, Firefox, iphone, Android... This is a sample course from our training library. You're welcome to view the course for personal use. Drivers of member fleets will receive a certificate after completing the online course. Please sign into your account to take an assignment. A certificate will be delivered electronically to your driver qualification file. Customer Comments Dennis Atencio - Director of Safety Bob Bowman - Director, Safety & H.R. Tim Long - Director of Safety © 2010-2016. Safety as a Service. A product of CDL College. 7170 Dahlia St. Commerce City, CO 80022. 303-367-1030 How do you do alley docking correctly?Positioning the truck correctly is the answer to successful alley docking. If the truck isn’t positioned correctly, it can be next to impossible to do a 45 degree back up maneuver, and the risk of incurring damage to equipment or property escalates! Backing up a big rig is probably the hardest driving skill to perform by a truck driver.
What skills do new truck drivers need to drive Alley docks?One of the important skills new drivers will need to develop is setting up for a dock. Positioning the truck correctly is the answer to successful alley docking. If the truck isn’t positioned correctly, it can be next to impossible to do a 45 degree back up maneuver, and the risk of incurring damage to equipment or property escalates!
What should you look for when backing up at a dock?Rule #1 – REMEMBER G.O.A.L. G.O.A.L. = GET OUT AND LOOK. Always have a good look at the docking area and the surrounding area before setting up to commence backing up. Look for obstacles, especially things that are below the site line. These things will most likely not be visible in the mirrors, once the driver starts to back up.
What is the goal when positioning the truck to back up?The goal is when positioning the truck to prepare to back up, maneuver in such a way that the rear of the trailer will track as straight into the dock as possible. Follow the track of the rear of the trailer.
When performing an alley dock What is the required proximity from the rear of the trailer to the end of the alley dock box?A LATE trailer can be sped up toward the alley by steering to the right. Don't hold your turns too long, steer back to center. When finished, the rear of your vehicle must be within 3 feet of the rear of the alley.
What type of backing maneuver provides for the best visibility?Sight side backing is backing toward the left side of the vehicle where the driver can see the intended trailer path. Sight side backing is preferred as the driver has maximum visibility.
What is one of the most important things to remember when you are performing a backing maneuver?Since it is more difficult to maintain steering control and vehicle balance when the vehicle is in reverse, always back at slow speeds. Reverse is a more powerful gear than drive, so you should use the accelerator pedal carefully, if at all. Otherwise your car will move too fast as shown.
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What is the key characteristic to alley dock backing maneuver?
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