Document ID: chunk:federal_register_of_legislation:F2025C00113:front:0:p5
Version: federal_register_of_legislation:F2025C00113
Segment Type: other
Provision Reference: 
Character Range: 13560–16642

which compensate for any increased movement of its components arising from wear.  Such devices must themselves contain provision for securing them throughout their working range in any position to which they may be adjusted or to which they may themselves automatically adjust.
 8.                                 Except for braking systems capable of producing asymmetric braking in response to prevailing tractive conditions, or as required by the 'Braking Systems' of clause 7.2, each 'Brake System' must, when applied, produce a resultant braking force acting along the longitudinal centre line of the trailer.
 9.                                 Where the 'Supply Line' supplies energy to devices other than the 'Brake Power Unit 35/...' including spring brakes, the design must be such that:
             1.           all the 'Brake Power Unit 35/...' are preferentially charged until the 'Supply Line' reaches an energy level of not less than 0.69 'E' (450 kPa); or
             2.           the spring brakes must not release before there is sufficient pressure in the service air tank to allow application of a service brake to at least the emergency ERC as required by clause 8.1.
              1.                           Systems that utilize spring brakes for emergency and parking brakes are deemed to comply with this clause 6.14, if the parking/emergency brakes do not release until a service tank pressure of 0.435 'E' (283 kPa) is reached.
              2.                           Spring brake release is deemed to occur when the brake friction materials cease to contact.
 1.                                 The first call on the 'Stored Energy' must be that of the 'Brake System'.  Any other demand for 'Stored Energy' must be disconnected automatically if the 'Stored Energy' level falls below 0.69 'E' (450 kPa).
 2.                                 Where separate methods of actuation are provided for any of the functions of the 'Brake System', the actuation of one function must not cause the operation of another function.
     1.                           In the case of a trailer equipped with both a pneumatic 'Control Line' and an electric 'Control Line', when 'Control Signals' for both 'Control Lines' are provided through the coupling head of a towing vehicle, the trailer must use the electric 'Control Signal' unless this signal is deemed to have failed.  In this case the trailer must automatically switch to the pneumatic 'Control Line'.
 3.                                 'Stored Energy' devices must be safeguarded to prevent depletion of the 'Stored Fluid Energy' through failure of any part of the supplying system.
 4.                                 In the case of a compressed air 'Brake system', a pressure test connection complying with clause 4 of ISO 3583:1984 must be fitted at either the inlet to, or in the body of, the brake chamber with the slowest reaction time in each 'Axle Group' (in respect of brake timing as specified in clause 16).
 5.                                 Where a 'Retractable Axle' is fitted, a trailer has