Document ID: chunk:federal_register_of_legislation:F2007C00514:front:0:p20
Version: federal_register_of_legislation:F2007C00514
Segment Type: other
Provision Reference: 
Character Range: 55896–58668

be charged to not more than the 'Average Operating Pressure' and the brakes must be adjusted according to the 'Manufacturer's' specifications for normal use.
8.17.4.                          The service brake 'Control' must be operated through a full working stroke by an operator seated in the normal driving position.
8.17.5.                          The pressure at the slowest reacting brake chamber must attain a level not less than 65 percent of the 'Average Operating Pressure' within a period not exceeding 600 milliseconds measured from the instant the 'Control' leaves the 'Initial Brake Control Location'.
8.17.6.                          The brakes must be kept applied until the air pressure in the brake chamber has stabilised. The brakes must then be fully released.
8.17.7.                          Within 500 milliseconds of the 'Control' being released the pressure in the slowest reacting brake chamber must fall below the lesser of either:
8.17.7.1.                    5 percent of the 'Average Operating Pressure' or
8.17.7.2.                    to a pressure at which the friction materials cease to contact each other.
8.17.8.                          For a vehicle equipped to tow a trailer which uses air at positive pressure as the brake operating fluid ;
8.17.8.1.                    when the service brake 'Control' is operated through a full working stroke by an operator seated in the normal driving position, the pressure measured at the extremity of a pipe 2.5 m long with an internal diameter of 13 mm which must be joined to the 'Coupling Head' of the 'Control Line 35/...' must reach 420 kPa within 400 milliseconds of the instant the 'Control' leaves the 'Initial Brake Control Location' .  During this test a volume of 385 ± 5 cm 3 (which is deemed to be equivalent to the volume of a pipe 2.5 m long with an internal diameter of 13 mm and under a pressure of 6.5 bar) must be connected to the 'Coupling Head' of the 'Supply Line 35/...' ; and
8.17.8.2.                    having fully applied the service brake 'Control' and the pressure measured at the extremity of a pipe 2.5m long with an internal diameter of 13 mm which must be joined to the 'Coupling Head' of the 'Control Line 35/...' has stabilised, when the service brake 'Control' is fully released the pressure measured at the extremity of the 2.5 m long pipe with an internal diameter of 13 mm joined to the 'Coupling Head' of the 'Control Line 35/...' must fall below 35 kPa within 500 milliseconds of the 'Control' being released. During this test a volume of 385 ± 5 cm 3 (which is deemed to be equivalent to the volume of a pipe 2.5 m long with an internal diameter of 13 mm and under a pressure of 6.5 bar) must be connected to the 'Coupling Head' of the 'Supply Line