Document ID: chunk:federal_register_of_legislation:F2006L03054:body:0:p3
Version: federal_register_of_legislation:F2006L03054
Segment Type: other
Provision Reference: 
Character Range: 8579–12122

vehicles - Mechanical coupling between prime movers and Semitrailers - Interchangeability requirements".
5.2.4.2.                        'Fifth Wheel' Kingpins must be attached to the 'Semi-Trailer' skid plate in conformity with the requirements of Australian Standard 2175-1990 "Articulated Vehicles - Kingpins", Appendix D.
5.3.                                    Marking and strength
Unless otherwise 'Approved' all 'Couplings' must conform with the marking and strength requirements as specified below:
5.3.1.                              'Fifth Wheel' assemblies must comply with the requirements of Australian Standard 1773-1990 "Articulated Vehicles - Fifth Wheel Assemblies"
5.3.2.                              'Fifth Wheel' kingpins must comply with the requirements of Australian Standard 2175-1990 "Articulated Vehicles - Kingpins".
5.3.3.                              Pin-type 'Couplings' must comply with the requirements of Australian Standard 2213-1984 "50 mm Pin-type Couplings and Drawbar Eyes for Trailers".
5.3.4.                              50 mm 'Ball Couplings' must comply with the requirements of either:
5.3.4.1.                        AS D18-1968 "50 mm Ball Couplings (for Automotive Purposes)" including Amendment 1 or;
5.3.4.2.                        ISO Standard 3853 "Strength Tests" and ISO Standard 1103 "Dimensional Characteristics" or;
5.3.4.3.                        AS 4177.2-1994 "Caravan and light trailer towing components - 50 mm towballs" and Australian Standard 4177.3-1994 "Coupling Body for Ball Couplings".
5.3.5.                              127 mm 'Ball Coupling'
5.3.5.1.                        'Ball Couplings' of nominal diameter of 127 mm shall when installed in the design configuration withstand the following forces without incurring any residual deformation that would interfere or degrade the function of the assembly, nor shall there be any breaks, cracks or separation of components:
5.3.5.1.1.                  longitudinal tension and compression 1.6  'D-value'; and
5.3.5.1.2.                  vertical tension and compression 0.5  'D-value'; or
5.3.5.1.3.                  a dynamic oscillating force of ± 0.6  'D-value' in the longitudinal direction and ± 0.2 'D-value' in the vertical direction applied concurrently for 2 million cycles. The frequency of the longitudinal and vertical forces must differ by approximately 5% and not exceed 10 Hz, but must be chosen not to coincide with the natural frequency of the system.
5.3.5.2.                        127 mm 'Ball Couplings' must be marked in lettering not less than 6 mm in height with the manufacturer's name or trademark and the rated 'D-value' so as to be readily visible when coupled.
5.3.6.                              Hook 'Couplings'
5.3.6.1.                        Hook 'Couplings' suitable for use with a 76.2 mm internal diameter  41.27mm stock towing eye must comply with the dimensions shown in Figure 1.
5.3.6.2.                        Hook 'Couplings' must when installed in the design configuration withstand the following forces without incurring loss of attachment, distortion or failure which would affect the safe towing of a trailer:
5.3.6.2.1.                  longitudinal tension and compression 1.6 'D-value'; or
5.3.6.2.2.                  a dynamic oscillating force of ± 0.6  'D-value' for 2 million cycles. The frequency during testing not to exceed 10 Hz, but must be chosen not to coincide with the natural frequency of the system.
5.3.6.3.                        Hook 'Couplings' and