RINGFEDER® trailer coupling 4040 AM/RL

Air assisted all-rounder for light to medium transportation

Semi Assisted
Semi Assisted
Fixed + Articulated
Fixed + Articulated

RINGFEDER® trailer coupling 4040 AM/RL ,


A convenient quick operation air opened 40mm trailer coupling for hinged or rigid drawbars. It is ideal for general transportation operations where heavy-duty wear is not required. The self-closing and automatically secured coupling provide high safety and long-term reliable performance. The pneumatic opening makes it ergonomic, time-saving and improved productivity for the driver. A remote locking indication is included (sensor and in cab LED light - Red light = coupling open / Green light = coupling closed).

Say goodbye to the wire!

Ringfeder Red Line (AM/RL) - the Original

Module / Red Line (AM/RL) adds the convenient pneumatical opening of the coupling. Another advantage of the original is the 50 percent higher closing power compared to a standard coupling. This makes coupling and uncoupling faster and more ergonomic for the driver. The air-assisted operation will save time and improve productivity.

AM/RL couplings can be connected to the existing compressed air supply of the truck – the installation of a separate compressed-air line is not needed.

The coupling can be operated by your control unit of choice. Compatible with Duomatic, Palm, C-coupling and Valve box.

Choose variant

Why should I choose this?

This Ringfeder coupling is an ECE certified high-quality product that requires minimal service and maintenance. It is easy to operate, and you will have the most reliable performance. Full support and global spare part availability, together with long, trouble-free service life, provides the excellent Ringfeder value to owners and users.

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A high-quality product
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Easy to operate
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The most reliable performance
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Full support and spare part availability

Documents / Manuals

Are you missing a certain document?

You will find all documents under Support.

Go to support
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