Document ID: chunk:federal_register_of_legislation:F2014C01118:front:0:p21
Version: federal_register_of_legislation:F2014C01118
Segment Type: other
Provision Reference: 
Character Range: 61655–64627

Single Tyre'  (over 450 mm width)

         RFS 'Road Friendly Suspension'

    Note: The relationship required by the diagram shall apply progressively for the intermediate states of loading between the laden (Figure 1) and the unladen (Figure 2) states and shall be achieved by automatic means.

          USE OF TRAILER COMPRESSED AIR BRAKE TEST RIG

        NOMENCLATURE FOR FIGURES 3 AND 4

        A = supply connection with single check valve and regulator set at 650 kPa

        CF  = trailer brake actuator

        L  = coupling hose, 13 mm nominal bore and 2.5 metres long

        M  = pressure gauge

        O  = orifice (see clause 15.4)

        R1  = reservoir of not less than 30,000 ml

        R2  = calibrating vessel of 800  ±  5 ml

        RA  = shut off valve

        TA  = coupling head - supply (emergency)

        TC  = coupling head - control (service)

        TOA  = transducer point for timing inlet to brake actuation time

        TOR  = transducer point for timing inlet to brake release time

        T1  = transducer point for calibration at end of R2 reservoir

        T2 = transducer point for testing rear tow coupling of trailer

        T3  = transducer point for testing trailer

        V  = brake control valve

APPENDIX 1
        Special Provisions for TC Category Trailers over 4.5 Tonnes ATM and TD Category Trailers Incorporating an 'Antilock System'

         1.  PERFORMANCE REQUIREMENTS

         1.1   The 'Brake System' of trailers must comply with the requirements of this ADR including clause 6.5 with the 'Antilock Systems' operational and in the event of a failure of the 'Antilock System'  .

         1.2   At speeds exceeding 15 km/h the wheels on the 'Axle(s)' specified in clause 2.1 of this APPENDIX must remain unlocked when a 'Control Signal' of 1.0 'E' (650 kPa) is suddenly applied from an initial speed of 40 km/h +5 to -1 km/h and from an initial speed of at least 80 km/h on a road surface having approximately uniform surface friction on both sides of the vehicle.

         1.2.1   This test is to be performed with the trailer laden to both 'Lightly Laden Test Mass' and 'Maximum Loaded Test Mass' and using the general test conditions from clause 9 and the particular test conditions from clause 10, amended as regards 'Control Signal' amplitude and application rates.

         1.2.2   Brief periods of locking of the wheels are allowed, but stability must not be affected.

         1.1.3   The operation of an 'Antilock System' must not be adversely affected by magnetic or electric fields.

         2.  INSTALLATION REQUIREMENTS

         2.1   An 'Antilock System' complying with clause 1 of this APPENDIX must be fitted to:

         2.1.1   each 'Single Axle';

         2.1.2   at least one 'Axle' in any 'Tandem Axle Group';

         2.1.3   at least two 'Axles' in any 'Triaxle Group'.

         3.  ANTILOCK SYSTEM  - ELECTRICAL SYSTEM.

         3.1   'Antilock Systems' must