Orlando

Park Brake System Description and Operation

Note: Plastic coated handbrake cables do not need periodic lubrication.

Coated handbrake cables are used to reduce apply effort and increase corrosion protection. The cables are coated with plastic material which slides against nylon seals inside the conduit end fittings.

Park brake apply input force is received by the park brake lever assembly being applied. The input force is multiplied by the lever assembly, transferred and evenly distributed, through the park brake cables and the park brake cable equaliser, to the left and right park brake apply levers. The park brake apply levers multiply and transfer the apply input force to in turn apply the disc brake caliper pistons which compress the brake pads against the friction surface of the brake rotors in order to prevent the rotation of the rear tire and wheel assemblies. The park brake lever assembly releases an applied park brake system when it is released and returned to the at-rest position.

Park brake apply input force is received by the park brake lever assembly being applied. The input force is multiplied by the lever assembly, transferred and evenly distributed, through the park brake cables and the park brake cable equaliser, to the left and right park brake apply levers. The park brake apply levers multiply and transfer the apply input force to the drum brake actuators/adjusters which expand the drum brake shoes toward the friction surface of the brake drum in order to prevent the rotation of the rear tyre and wheel assemblies. The park brake lever assembly releases an applied park brake system when it is released and returned to the at-rest position.

If park brake is released, the jaws (1) are pushed apart (arrows) and will be retained by a locking mechanism. Thus the conduit (2) is disengaged. Now the conduit can move free in longitudinal direction during regular driving and braking.

During engagement of park brake, the conduit (2) slides back to the limiting arrest given through the brake pads. The jaws (1) are pushed back (arrows) and clamp the conduit (2).

Fading through wearing process is prevented because the conduit will be clamped at any position.