Parking Brake - Mechanical Suspension - PRONAR T286 Operator's Manual

Pronar T286 SECTION 3
FIGURE 3.11 Positions of loosening-parking valve
(A), (B), (C), (D)- valve working modes

3.2.6 PARKING BRAKE - MECHANICAL SUSPENSION

The parking brake is used for immobilising trailer while standing motionless. System design is
shown in Figure (3.12). The brake crank mechanism (2) is mounted on the bracket placed on
the left longitudinal member of the lower frame, on the front of the trailer.
Expander levers (1) of wheel axle are connected to lever (5), through arms (7), by means of
cable II (4) guided in rollers (6). Lever (5) is connected to the brake crank mechanism (2) by
means of steel cable I (3).
Tensioning the cable I (3) (by turning the crank mechanism clockwise) causes deflection of
lever (5) and tension of cable II (4) causing a deflection of expander arms (1), which
immobilize the trailer by parting the brake shoes.
3.16