Alexander Dennis Wabco Tristop Spring Brake Actuator recall: Loss of braking effort
- What's wrong
- On some TRISTOP� actuators the chambers may not have been correctly assembled and the load from power spring and pressure is not fully taken. Under certain circumstances the parking side and the service sides of the actuator could separate and the actuator could lose functionality.…
- What to do
- Contact a Alexander Dennis dealer to book the free repair. Identify and replace affected actuators.
What’s wrong
On some TRISTOP� actuators the chambers may not have been correctly assembled and the load from power spring and pressure is not fully taken. Under certain circumstances the parking side and the service sides of the actuator could separate and the actuator could lose functionality. Ultimately this could lead to a loss of braking functionality and/or brake failure. Critical applications are vehicles such as city buses or garbage collection vehicles (subject to a high parking brake frequency).
The fix
Identify and replace affected actuators.
Vehicles affected
| Model | Built from | Built to | Vehicles |
|---|---|---|---|
| Wabco Tristop Spring Brake Actuator | 1 Aug 2014 | 28 Feb 2015 | 715 |
How to check your vehicle
Use the official DVSA checker with your registration number to see if your exact vehicle is included. If it is, the manufacturer should have written to the registered keeper. The repair is free, even if you bought the vehicle second-hand.
Updated 18 May 2016. This page summarises an official notice. Details can change – always follow the official notice.