Coupling Technologies

Manual Release Lock Security

JOST’s signature Manual Release locking mechanism is one of the original features in all other JOST fifth wheel products, setting the industry standard for fifth-wheel construction and functionality. With just four moving parts, JOST’s Manual Release Lock Security ensures ultimate safety and simplicity for secure, efficient hauling.

Standard Handle Features
Retractable Handle Features

Manual Release Flyer

Air Release Feature

JOST’s Air Release feature allows for easy operation and safety. Complete with a visual lock indicator, wear reducing cushion ring, and full-size release handle, JOST’s Air Release feature is a convenient option for large national fleets and owner operators.

Air Release Flyer

Sensor wheel

The JOST UBK Sensor Wheel allows the driver to know when the fifth wheel is properly and safely coupled from inside the cab by sending a signal to a display in the cab that illustrates when the wheel is properly coupled.

Visual lock indicator for proper locking.
Automatic secondary lock to ensure security.
Cushion ring in throat reduces wear on the kingpin and absorbs impact.
Full size release handle for easy manual release.

Sensor Wheel Flyer

Loc-Light sENSOR

The dual-sensor system is connected to the Go/No-Go indicator light located next to the handle. A proper coupling with the handle and kingpin in the locked position will be lit up as green or “Go light”. If the system does not detect the handle and/or kingpin in the proper locked position, the light will flash red or “No-Go light”