How do I replace Knott spring housings?

What is the difference between a spring housing and an overrun damper?

The spring housing is part of the overrun brake. It holds the springs that absorb the forces when you brake. The overrun damper, by contrast, is a hydraulic or gas-filled component that damps the movement between the towing vehicle and the trailer. The two work together to give smooth, controlled braking. We carry spare parts for both systems from Knott.

How often does a spring housing need replacing on a Knott trailer?

A spring housing normally lasts many years in normal use. Signs that it may be due for replacement are braking that feels uneven, unusual noises when braking, or springs that have lost their tension. We recommend checking it at every service so wear is caught in time.

Can I replace the torsion bars myself?

Torsion bars are part of the suspension and usually need special tools and know-how to replace. They are under load, and handling them incorrectly can be dangerous. We recommend that this work is done by a workshop with the right equipment and experience of torsion suspension.

What is an anti-snaking damper, and when should it be replaced?

An anti-snaking damper reduces swaying between the towing vehicle and the trailer, which makes towing more stable. It should be replaced when you notice increased side-to-side movement, oil leaking, or when the damper feels weak if you check it by hand.

Do the brakes need adjusting after the spring housing is replaced?

After replacing a spring housing the brake system usually needs adjusting to work properly. That means setting the correct pre-tension and checking that the brake shoes are working as they should. Always follow Knott's fitting instructions for your specific model.

How long does it take to replace a spring housing?

For someone with basic mechanical knowledge the job normally takes 1–2 hours, depending on how the trailer is built and how easy the parts are to reach. The first time may take longer, while an experienced mechanic is often quicker. Follow the fitting instructions carefully.