A stabiliser coupling reduces your trailer’s tendency to sway by automatically clamping down on the tow ball before swaying can develop. In this guide we look at the steps involved to fit an anti sway stabiliser coupling to your trailer.
In most cases, installing a stabiliser coupling is a fairly straightforward process. It requires only a basic amount of mechanical aptitude and basic tools. That said, in the interest of safety, you should only install your trailer coupling if you are confident doing so and have the correct tools. Alternatively, ask someone more capable to complete the installation for you.
- Before starting, ensure the trailer is empty.
- Lower the jockey wheel so that the trailer is level with the ground.
- To prevent the trailer from moving during installation, place chocks against the trailer wheels.
- Disconnected the hand brake cable then remove the existing electric / fixed coupling.
- Position the handbrake base plate over the existing two rear coupling location holes.
- A suitable spacer plate will need to be placed over the two front mounting holes.
- Position the Stabiliser Coupling on top of the handbrake base plate and the spacer plate then using suitable hi-tensile bolts mount and securely tighten the Stabiliser Coupling. The use of quality spring washers and lock nuts or Nyloc ™ nuts is recommended.
- Reconnect the existing hand brake cable adjuster on to the hand brake lever and adjust the cable tension. In some cases
it may be necessary to shorten the cable length at the brake assembly.
Securely fix the special black oxidized towball with washer, nut and the rotation resisting adaptor plate to the towbar lug on your tow vehicle.
Failure to use the approved componentry for your stabilizer coupling may cause the trailer to uncouple as the coupling stabilises the trailer by clamping down on the tow ball to neutralise sway. Conventional tow balls used in Australia and New Zealand are bolted on to the towbar tongue without an anti rotation plate, so the stabilizer coupling may eventually loosen it when it engages.
- With the stabilising handle in its raised position, lift the coupling handle and lower the stabiliser head onto the new towball.
- With the towball correctly engaged in the coupling, the green band of the safety button will be visible. Approximately 4-5mm above the top of the soft red bump protector.
- To lock the unit in, press the stabilising handle down until it is over centre and against the end stop.
Your Stabiliser Coupling is now installed and ready for you to complete your normal pre-travel checks and to enjoy many thousands of kilometres of stable towing pleasure.
You’ll find more information on other trailer couplings, such as fixed and off-road couplings, on the AL-KO website.