What methods can you use to secure a second trailer before coupling?

What methods can you use to secure a second trailer before coupling?

What three methods can you use to secure a second trailer before coupling? Release dolly brake by opening the air tank petcock or if the dolly has spring brake, use the dolly parking brake control. Wheel the dolly into position by hand so it is in line with the kingpin.

When dealing with multiple trailers How should you arrange them?

The last trailer in a combination is most likely to turn over. If you don’t understand the crack-the-whip effect, study subsection 6.1. 2 of this manual. There are more critical parts to check when you have two or three trailers.

When pulling more than one trailer Which of the following is correct?

When pulling more than one trailer, which of the following is correct? The heaviest trailer must always be in the first position behind the tractor. When pulling doubles and triples you should always look at least 12-15 seconds ahead.

What 3 methods can you use to secure a second trailer before coupling?

What three methods can you use to secure a second trailer before coupling? 1) Connect the emergency line, charge the trailer air tank, and disconnect the emergency line. 2) Spring brakes. 3) Wheel chocks.

What’s a converter dolly?

A converter dolly is a piece of equipment designed to allow commercial trucks, such as semi-trucks, to pull a trailer. The converter dolly is an auxiliary axle with a coupling device. Its fifth wheel makes it easier for the truck to pull a trailer.

Can you back up double trailers?

Backing a double-trailer combination can be done by truckers experienced with them, but can be very difficult for those who aren’t. On the tablet’s touch screen, the operator chose forward or reverse, then slid his finger over an image of the rear pup trailer, swinging it left or right.

When pulling double trailers which trailer should be in the front?

When pulling more than one trailer: The position of the heaviest trailer is not important as long as the brakes are working properly. The heaviest trailer should be in first position behind the tractor. The heaviest trailer should be the very last trailer.

How do you know if your converter dolly is equipped with anti lock brakes?

There is a yellow lamp on the left side of the dolly. Converter dollies built on or after March 1, 1998 are required to have Anti-Lock Braking Systems (ABS). The presence of ABS will be indicated by a yellow lamp on the left side of the dolly.

What is a drawbar trailer?

A drawbar trailer is a self-supporting, unpowered trailer which has at least one axle at either end of the trailer. The front axle is connected to a drawbar and the axle pivots to provide steering, following the direction in which the drawbar is pulled. This is sometimes called a dolly.

Why does FedEx use double trailers?

It’s been steady for years because the logistical flexibility of doubles is well-suited to FedEx Ground’s needs, and drivers with doubles experience are always in demand. ‘ Also, drivers say, ‘Doubles are a much more economical way of transporting freight for the customer.

What’s the best way to lock a trailer?

There are a few types of ways you can lock a trailer. Below you can find the most important types of trailer locks. Hoop Lock – A common trailer hitch lock is something like the Reese Lock. This uses the hoop lock design, similar to what you would see with a U-lock for bicycle security or even some motorcycle security.

What to do when your double trailer does not work?

Open shut-off valves at rear of first trailer (and on dolly if so equipped). Raise landing gear completely. Charge trailers (push “air supply” knob in) and check for air at rear of second trailer by opening the emergency line shut-off. If air pressure is not there, something is wrong and the brakes will not work.

What can I put on my trailer to keep it from being stolen?

A wheel chock lock is another device that could be added to your travel trailer, rv, automobile, or anything on wheels to keep it from being stolen. This is similar to the boot, where it goes around your tire and wheel and locks it in place.

How do you test coupling on a semi trailer?

Test coupling by pulling against pin of number two semi-trailer. Make visual check of coupling no space between upper and lower fifth wheel. Locking jaws closed on kingpin). Connect safety chains, air hoses and light cords. Close converter dolly air tank petcock and shut-off valves at rear of second trailer (service and emergency shut-offs).