Document ID: chunk:federal_register_of_legislation:F2025C00108:front:0:p21
Version: federal_register_of_legislation:F2025C00108
Segment Type: other
Provision Reference: 
Character Range: 60351–63418

each single type of partial failure, including:
                 1.             inoperative 'Antilock System'; and
                 2.             inoperative 'Variable Proportioning Brake System'.
         2.                               One single failure must be induced prior to each set of deceleration modes and the vehicle must be restored at the completion of each set.
     6.                                     Service Brake Laden Effectiveness Test
         1.                               A series of tests must be conducted in the manner described in Table 1 (Item 6) or as an alternative in the case of a vehicle incorporating a compressed air 'Brake System', Table 5 (Item 6A).  The vehicle will be deemed to satisfy the requirements of this test, if all the parameters specified in the relevant Table are met in at least one test within a number of tests that must not exceed 6.
     7.                                     Laden Secondary Brake Test
         1.                               Where the secondary brake is not applied by the service brake 'Control', the vehicle must be decelerated using only the 'Secondary Brake System' and deemed to satisfy the requirements of this test, if all the parameters specified in Table 1 (Item 7) are met in at least one test within a number of tests that must not exceed 6.
         2.                               Where the secondary brake is applied by the service brake 'Control', the vehicle will be deemed to satisfy the requirements of this test if all the parameters specified in Table 1 (Item 7) or as an alternative in the case of a vehicle incorporating a compressed air 'Brake System', Table 5 (Item 7A) are met in at least one test within a number of tests that must not exceed 6 for each single failure of a fluid system, including where appropriate:
                 1.             each sub-system of a 'Split Service Brake System'; and
                 2.             failure of energy assistance in a 'Brake Power Assist Unit'.
     8.                                     Laden Partial Failure Test
         1.                               The test procedure and determination of compliance must be as specified in clause 8.5, except that the vehicle must be at 'Maximum Loaded Test Mass 35/...' and the test parameters to be achieved are as described in Table 1 (Item 8).
     9.                                     Service Brake Fade Test
         1.                               In the case of vehicles in categories MB, MC, MD and NA, 15 successive deceleration tests must be conducted at intervals no greater than 55 seconds apart, such that for an initial speed V1 and a final speed V2 (km/h):
       (V12 ‑ V22)  > 7,500.
 1.                               In the case of vehicles in categories ME, NB and NC, 20 successive deceleration tests must be conducted each not more than 70 seconds after the preceding one and with the total of 20 applications completed within 20 minutes, such that for an initial speed V1 and a final speed V2 (km/h):
       (V12 ‑ V22)   2,700.
 1.