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CDL Pre-trip



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Apron = CBB 
Properly Mounted and Secure. Not Cracked, Bent, or Broken.

DANIEL’S TIP: The Apron is the front surface of the Trailer that the Fifth Wheel is beneath. Its the part of the trailer that doesn’t have visible cross members and flat with a few holes.

Gap = “I can see No Daylight”
There is no space between the Apron and Skid Plate.

DANIEL’S TIP: The Gap is not an actual item. Its the space between the Apron and the Skid Plate. There should be no daylight between the Apron and Skid Plate.

Locking Jaws = CBB & Fully Locked around Kingpin
Properly Mounted and Secure. Not Cracked, Bent, or Broken. Fully locked around the King Pin.

DANIEL’S TIP: On your exam you must bend down and physically check those Locking Jaws, just like you should be doing every day several times. Be sure to say its fully locked around the King Pin.

Glad Hands = CBB, No Leaks, Dry Rot
Properly Mounted and Secure. Not Cracked, Bent, or Broken. Seals are in good condition, no cracks or signs of dry rotting. Not leaking air.

DANIEL’S TIP: Take an air line off during the test so you can show the examiner the seals.

Air Lines = ABC & No Leaks
Properly Mounted and Secure at both ends. No Abrasions, Bulges or Cuts. Not leaking air.

DANIEL’S TIP: Don’t forget to say “At both ends.” Be sure to point at both the red and blue air line.

Pivot Pin, Safety Pin, and Cotter Pin 

Securely Mounted, Present and not Cracked, Bent or Broken.






Electric Line = ABC
Properly Mounted and Secure at both ends. No Abrasions, Bulges or Cuts. No exposed wires. 

DANIEL’S TIP: Don’t forget “at both ends”. Its really easy to forget to say “No exposed wires.” so really make that line stick so you won’t miss it on the exam.

Clearance
Make sure that there is the proper space between the tractor mudflap and the trailer landing gear. So that they don’t hit each other when making a turn.

DANIEL’S TIP: Clearance is by far the easiest to forget of everything in the entire test! I kid you not. Please engrave this into your head. You want to check the space between your mudflap and landing gear, so they don’t hit each other on a turn

Sliding Fifth Wheel And Locking Pin = CBB & Fully Engaged
Properly Mounted and Secure. Not Cracked, Bent, or Broken. Is in the fully locked position.

The Locking Pins are positioned properly to give clearance between the tractor and landing gear during turns. The Locking Pins are Fully engaged/Locked. There are no loose or missing parts.

Mounting Bolts = CBB & None Missing
Properly Mounted and Secure. Not Cracked, Bent, or Broken. None missing.

DANIEL’S TIP: Technically, you could combine this with the Platform but I choose not to. Up to you. Be sure to point at the bolts and don’t forget to say none missing.

Skid Plate = CBB & Lubed
Properly Mounted and Secure. Not Cracked, Bent, or Broken. Properly lubed.

DANIEL’S TIP: The Skid Plate is the top slippery surface of the Fifth Wheel. It must be properly lubed.

Platform = CBB
Properly Mounted and Secure. Not Cracked, Bent, or Broken.

DANIEL’S TIP: The Platform is what the Fifth Wheel rests on. It goes Frame, then Platform, then Fifth Wheel (bottom up). The Platform is easy to inspect, feel free to combine it with the Mounting Bolts. But again, I choose not to.

King Pin = CBB
Properly Mounted and Secure. Not Cracked, Bent, or Broken.

DANIEL’S TIP: Can be easy to miss because you can’t see it. But please don’t miss something so important as the King Pin. Engrave this into your head.

 Release Arm = CBB & Locked Position
Properly Mounted and Secure. Not Cracked, Bent, or Broken. Is in the fully locked position.

DANIEL’S TIP: The Release Arm is what allows you to disengage the Locking Jaws. The handle, or Arm, must be in the fully locked position. You must say that!
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