Document ID: chunk:federal_register_of_legislation:F2018C00339:body:0:p5
Version: federal_register_of_legislation:F2018C00339
Segment Type: other
Provision Reference: 
Character Range: 14590–17780

a service tank pressure of 0.435 'E' (283 kPa) is reached .
         5.14.3.                           Spring brake release is deemed to occur when the brake friction materials cease to contact.
5.15.                                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).
5.16.                                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.
5.17.                                 'Stored Energy' devices must be safeguarded to prevent depletion of the 'Stored Fluid Energy' through failure of any part of the supplying system.
5.18.                                In the case of a compressed air 'Brake system', a pressure test connection complying with clause 4 of ISO Standard 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 part 15).
5.19.                                Where a 'Retractable Axle' is fitted, a vehicle has a number of 'Configurations'. It must be demonstrated by physical testing or by calculation as described in the appropriate sections of this rule that in each 'Configuration', the vehicle complies with the laden condition requirements of this rule for that 'Configuration'. The laden condition for 'Configurations' with the 'Axle' retracted must be considered to be when the 'Axle Group' is laden to the 'Prescribed Transition Mass' for the 'Configuration' being considered. As the vehicle must automatically change its 'Configuration' at the  'Prescribed Transition Mass' by lowering an 'Axle', for the purpose of demonstrating compliance with the requirements of this clause, the automatic system for lowering the axle may be rendered inoperative.
         5.19.1.                           The requirements of clause 5.19 do not apply to:
5.19.1.1.                    the 'Service Brake System' compatibility requirements as described in clause 6.5.1. This requirement must only be demonstrated in the conditions as specified in clause 9.6; or
5.19.1.2.                    the service Brake Actuation Time Test as described in clause 15.1
         5.19.2.                           When determining the Park Brake Effectiveness either by test as in part 14 or by calculation as in part 19, the 'Aggregate Trailer Mass' is to be multiplied by the ratio of the 'Prescribed Transition Mass' for each 'Configuration' divided by the 'Group Gross Axle Load Rating'.
         5.19.3.                          When determining the Emergency Brake Effectiveness either by test as in part 13 or by calculation as in part 18, the 'Gross Trailer Mass' is to be multiplied by the ratio of the 'Prescribed Transition Mass' for each 'Configuration' divided by the 'Group Gross Axle Load Rating'.
6.                                          SERVICE  BRAKE  SYSTEM
6.1.                                    The 'Service Brake System'