When should you uncouple a trailer?
When should you uncouple a trailer?
The following steps will help you to uncouple safely.
- STEP 1: Position Rig.
- STEP 2: Ease Pressure on Locking Jaws.
- STEP 3: Chock Trailer Wheels.
- STEP 4: Lower the Landing Gear.
- STEP 5: Disconnect Air Lines and Electrical Cable.
- STEP 6: Unlock Fifth Wheel.
- STEP 7: Pull Tractor Partially Clear of Trailer.
- STEP 8: Secure Tractor.
What does uncoupling a trailer mean?
Whether the truck driver is hauling logs, automobiles, liquids, or other cargo, the fact remains that the tractor, or truck cab, and the trailer need to be hitched together. This process is called coupling. Unhitching the tractor from the trailer is called uncoupling.
When uncoupling a trailer after you have shut off?
When uncoupling the trailer, after you shut off the trailer air supply and lock the trailer brakes, you should: A Back up gently to ease pressure on the fifth wheel. Step 2: Ease Pressure on Locking Jaws – Ease pressure on fifth wheel locking jaws by backing up gently.
What will happen if the air lines are crossed?
If you do cross the air lines, supply air will be sent to the service line instead of going to charge the trailer air tanks. Air will not be available to release the trailer spring brakes (parking brakes). If the spring brakes don’t release when you push the trailer air supply control, check the air-line connections.
When you are uncoupling a loaded trailer you should lower the landing gear until it?
Always. When you are uncoupling a loaded trailer, lower the landing gear until it: Makes firm contact with the ground and you lift the trailer off the fifth wheel.
Which articulated trailer is most at risk of jackknifing?
Explanation: Jack-knifing occurs when the tractor unit is pushed by the semi-trailer pivoting around the coupling (fifth wheel). This is more likely to occur with an unladen vehicle.
How can you ease pressure on the fifth wheel locking jaws before uncoupling your tractor trailer?
Ease Pressure on Locking Jaws Ease pressure on fifth wheel locking jaws by backing up gently. (This will help you release the fifth wheel locking lever.) Put parking brakes on while tractor is pushing against the kingpin. (This will hold rig with pressure off the locking jaws.)
When hooking a tractor to a trailer you’ll know the trailer is at the right height when the?
The trailer is at the right height when: It will be raised slightly when the tractor is backed under it.
What gear should the tractor engine be in after you uncouple the trailer?
CDL
| Question | Answer |
|---|---|
| What gear should the tractor engine be in after you uncouple the trailer and are inspecting the trailer supports? | Neutral |
| You have coupled with a semitrailer. Where should you put the iron trailer supports before driving away? | Fully raised with the crank handle secured in its bracket. |
What’s the final thing you should do after recoupling a trailer?
After recoupling a trailer, the last thing to do is release the trailer parking brake. Before you’ve done this, though, you will have checked the airbrake lines are secure, the electrics are connected and the lights are working, and you’ve raised the trailer legs.
What must you check first when uncoupling or recoupling your trailer?
Explanation: If the trailer begins moving while you’re working on it, you could put yourself and others in great danger. You must make sure that it’s properly secured by the brake before you start work.
When uncoupling a trailer after you have shut off the trailer air supply and locked the trailer brakes you should?
When uncoupling the trailer, after you shut off the trailer air supply and lock the trailer brakes, you should: A Back up gently to ease pressure on the fifth wheel.
What gear should the tractor be in after you uncouple from the trailer and are inspecting the trailer supports?
When backing a tractor under a trailer you should line up?
A Directly in front of the trailer. Step 3: Put the tractor directly in front of the trailer. (Never back under the trailer at an angle because you might push the trailer sideways and break the landing gear.)
When Should drivers line up the tractor directly in front of the trailer?
When you get ready to back under a semi-trailer, you should line up: Directly in front of the trailer. The air leakage rate for a combination vehicle (engine off, brakes on) should be less than ______psi per minute. 4.
What are the different types of travel trailer tires?
There are two main types of travel trailer tire: Radial and Bias. In this section, we take a look at each type alongside their advantages and drawbacks. Radial trailer tires are the most expensive type.
What are radial trailer tires made of?
Besides being ready for anything, the wheel is made from durable steel, which has a modular design to ensure it won’t have any corrosion issues. And as all radial trailer tires, it promises you a smooth ride across those highways. Regardless of its high quality, there are two flaws to be found.
Are the best travel trailer tires cheaper?
The best travel trailer tires aren’t cheap, and nor should they be. High-quality tires are crucial to your safety, so this isn’t a time to look for the absolute cheapest option you can find.
Can you haul a trailer with low quality tires?
You simply don’t want to risk hauling a trailer with low quality tires. This is not only very dangerous for you, but for everyone else on the road too. The best way to ensure you’re getting a high-quality tire is to opt for well-respected brands who have been in the game for a long time and earned their reputation.