Are there any Sensa Brake experts on here or is any body skilled up on testing and rebuilding the drawbar mounted trailer control unit?
I have an on going issue with the Sensa Brake system on my boat trailer holding slight hydraulic pressure in the lines after a hard brake application.
It causes just enough pressure in the lines that you can only just turn the wheels by hand if you have the jack under the axles.
Even if you then disconnect from the vehicle and drain all the air out of the tank the wheels will still be dragging.
The only option is to crack a fitting on the hydraulic lines to let the pressure out and the callipers release.
I have had it looked at twice by one service agent who thought it was all the grease in the master cylinder/air piston area.
To me it is like there is either no free play between the master cylinder and the piston that pushes it however apparently this is not adjustable or the system that allows the fluid return to the reservoir is not allowing the fluid back to the reservoir when the brake application has finished.(Seal in backwards)??
Can any body suggest any thing before I replace the entire unit.
Thanks,