Should you look into the back of the fifth wheel to see if it is locked into the king pen?

You should look into the back of the fifth wheel to see if it is locked onto the kingpin? True. You should check to see if the fifth wheel is locked onto the kingpin. To drive, you need to raise the landing gear only until it just lifts off the pavement?

1. Which shutoff valve is open and closed?
2. Which of the following could happen if you try to couple when the trailer is too high?
3. When hooking a tractor to a trailer you will know the trailer is at the correct height when the?
4. Which shut-off valve should be closed on your last trailer?
5. Where are the shut-off valves?
6. What is the proper position of the fifth wheel when coupling?
7. What vehicles off track the most?
8. What should you hook up before backing under the trailer?
9. How can I make sure my trailer height is correct before coupling?
10. Why should you lock the tractor glad hands?
11. Why should you make sure the fifth wheel plate is dressed as required?
12. Why must the fifth wheel plate have enough grease?

Which shutoff valve is open and closed?

If you're only pulling one trailer, the shut off valves should always be closed or else the air will simply escape out the back of the trailer. If you're pulling more than one trailer, all valves should be open except the very last trailer, which should have all valves in the closed position.

Which of the following could happen if you try to couple when the trailer is too high?

In addition to incorrect coupling, if a trailer is too high off the ground and you try to back into it, you may cause damage as the rear of your truck cab could strike the front of the trailer. Further, the trailer king pin may become stuck in front of the fifth wheel plate which can be a costly and time wasting error.

When hooking a tractor to a trailer you will know the trailer is at the correct height when the?

The trailer is at the right height when: It will be raised slightly when the tractor is backed under it. Which part of the kingpin should the locking jaws close around?

Which shut-off valve should be closed on your last trailer?

Question: When driving a set of doubles, it is necessary to close which shut-off valve in the last trailer: A Back valve. Shut-off valves (also called cut-out cocks) are used in the service and supply air lines at the back of trailers used to tow other trailers.

Where are the shut-off valves?

The valve is typically located within 3 to 5 feet of where the water main enters the home. If you don't find it on the front wall, check for a mechanical room, or near the water heater or furnace. In a crawl space or with slab construction, the shut-off valve may be right inside the crawl space.

What is the proper position of the fifth wheel when coupling?

When coupling, the proper position of the fifth wheel is: A Tilted down toward the end of the trailer.

What vehicles off track the most?

Longer vehicles will offtrack more. The rear wheels of the powered unit (truck or tractor) will offtrack some, and the rear wheels of the trailer will offtrack even more. If there is more than one trailer, the rear wheels of the last trailer will offtrack the most.

What should you hook up before backing under the trailer?

After connecting the air lines but before backing under the trailer you should: A Supply air to the trailer system, then pull out the air supply knob.

How can I make sure my trailer height is correct before coupling?

How do you check to make sure trailer height is correct before coupling? It must be slightly lower than the center of the fifth wheel, so trailer is raised slightly when dolly is pushed under.

Why should you lock the tractor glad hands?

Why should you lock the tractor glad hands to each other (or dummy couplers) when you are not towing a trailer? A It will keep dirt or water out of the lines. Some vehicles have \"dead end\"" or dummy couplers to which the hoses may be attached when they are not in use.

Why should you make sure the fifth wheel plate is dressed as required?

A To prevent steering problems. Step 1: Inspecting the fifth-wheel - Be sure that the fifth wheel plate is greased as required. Failure to keep the fifth wheel plate lubricated could cause steering problems because of friction between the tractor and trailer.

Why must the fifth wheel plate have enough grease?

Grease can build up on the fifth wheel and attract dirt and debris, so degreasing it prior to inspecting it allows you to see any potential damage more easily. ... It is also very important to make sure all the grease buildup is removed in and around the lock jaw, throat and pivot points.