1. A Closer Look at the “D” Connection
NZR
A Closer Look at the “D” Connection

2. NZR Patented D-Train Hitching System
View from the Top Down – The “Rigid” Connection
Tractor has just backed into the kingpin of the trailer and by nudging forward has already exposed the “B-Train” for connection to the second trailer ( a single axle trailer and an “A-Train converter dolly connection is optional)
Have ignored the landing gear for simplicity of demonstration
The tractor-facing end of the trailer bogie is equipped with a unique after-frame pocket assembly which has entrance guides on each side. The after-frame of the tractor will typically tuck inside the trailer D-Train pocket about 11 – 12 inches. This depth is managed by allowing the fifth wheel to be pushed or pulled to complete a proper connection.