When uncoupling the converter dolly Why should you never unhook the pintle hook while it is still under the trailer?
When uncoupling the converter dolly Why should you never unhook the pintle hook while it is still under the trailer?
D. Remove the dolly as quickly as possible. Never unlock the pintle hook with the dolly still under the rear trailer. This could cause the dolly tow bar to fly up, possibly causing serious injury.
When connecting the converter dolly to the front trailer What do you do first?
- 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;
- Use the tractor and first semi trailer to pick up the converter dolly and move it into position.
When coupling twin trailers you should release the dolly brakes by?
air tank
A converter gear or dolly is a coupling device of one or two axles and a fifth wheel by which a semitrailer can be coupled to the rear of a tractor-trailer combination forming a double bottom rig. Release dolly brakes by opening the air tank petcock.
When uncoupling the rear semi trailer you should lower the converter dolly landing gear?
Uncouple rear trailer: Lower landing gear of second semitrailer enough to remove some weight from dolly. Close air shut-offs at rear of first semitrailer (and on dolly if so equipped). Disconnect all dolly air and electric lines and secure them. Release dolly brakes.
What is likely to happen if the pintle hook is unlocked while the dolly is still under the second trailer?
What is likely to happen if the pintle hook is unlocked with the dolly still under the second trailer? The dolly tow bar may fly up. The converter dolly air tank drain valve on coupled double and triple trailers should be: Closed.
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.
What should the trailer height be before you connect a converter dolly to a second or third trailer?
When connecting a converter dolly to a second or third trailer, the trailer height should correct. It should be slightly lower than the center of the fifth wheel.
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.
Is a tow dolly considered a trailer?
A car dolly or tow dolly is a two-wheel trailer that will lift only the front wheels of your car. The rear wheels remain on the ground as you tow your car with a tow dolly. On the other hand, a car carrier or car shipping carrier is a four-wheel trailer that will lift your entire car off the ground.
When backing a trailer What should you do?
When backing with a trailer, begin by turning the steering wheel in the direction opposite of the turn. Once the trailer starts to turn, reverse the direction of the steering wheel to follow the trailer.