5th Wheel

Grouping: Individual Course

Overview: 5th Wheel training involves 5th wheel coupling that provides the link between a semi-trailer and the towing truck, tractor unit, leading trailer or dolly. Some recreational vehicles use a 5th wheel configuration, requiring the coupling to be installed in the bed of a pickup truck as a towing vehicle. The coupling consists of a kingpin, a 2-or-3 1⁄2-inch (50.8 or 88.9 mm) diameter steel pin on the front of the semi-trailer, and a horseshoe-shaped coupling device called a 5th wheel on the rear of the towing vehicle.


  • Pre- Requisites: Grade 9
  • Duration: 3 Days
Training Week 1 Assessment
3 Days 5th wheel

This course covers

  • Lubrication
  • Inspections and adjustments
  • Correct any improper adjustment
Topics Covered
1  Cushion ring bolt
2  Retainer
3  Cushion ring insert
4  Lock jaw pivot pin
5  Collar
6  Bracket pin
7  Tab washer
8  Hex bolt
9  Plate spring
10  External tooth lock washer
11  Hex bolt
12  Release handle
13  Pivot bolt assembly
14  Locking bar bolt assembly
15  Lever with bushing
16  Locking bar
17  Lock jaw
18  Lock jaw spring
19  Eye bolt
20  Ring
21  Guide piece
22  Adjusting screw with hex nut
23  Double tension spring
24  Lubricating kit