Review Questions - Click On The Picture To Begin...
When disconnecting from a trailer, you should:
- The positioning of the tractor is not important as you can disconnect from any angle
- Put the tractor at a 90 degree angle to the trailer (or as close to 90 degrees as possible)
- Have the tractor at a 45 degree angle to the left or right of the trailer
- Have the tractor lined up with the trailer
Quote From The CDL Manual:
Position Rig
- Make sure surface of parking area can support weight of trailer.
- Have tractor lined up with the trailer. (Pulling out at an angle can damage landing gear.)
Next
Before disconnecting from a trailer, you should:
- Apply the trailer spring brakes, then gently pull forward against the trailer to apply tension onto the fifth wheel locking lever
- Apply the trailer spring brakes, then back up gently towards the trailer to ease tension off the fifth wheel locking lever
- Set the trailer spring brakes but wait to set the tractor parking brakes until the landing gear has been lowered and the air lines have been disconnected
- Set the tractor parking brakes but wait to set the trailer spring brakes until the landing gear has been lowered and the air lines have been disconnected
Quote From The CDL Manual:
Ease Pressure on Locking Jaws
- Shut off trailer air supply to lock trailer brakes.
- Ease pressure on fifth wheel locking jaws by backing up gently. (This will help you release the fifth wheel locking lever.)
- Put on parking brakes while tractor is pushing against the kingpin. (This will hold rig with pressure off the locking jaws.
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Next
When dropping an empty trailer, you should lower the landing gear until:
- The landing gear is 1 to 3 inches above the ground
- It makes firm contact with the ground
- You can't turn the landing gear handle any further
- None of these answers are correct
Quote From The CDL Manual:
Lower the Landing Gear
- If trailer is empty, lower the landing gear until it makes firm contact with the ground.
- If trailer is loaded, after the landing gear makes firm contact with the ground, turn crank in low gear a few extra turns. This will lift some weight off the tractor. (Do not lift trailer off the fifth wheel.) This will make it easier to unlatch the fifth wheel and easier to couple next time.
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