Document ID: chunk:federal_register_of_legislation:F2007C00514:front:0:p3
Version: federal_register_of_legislation:F2007C00514
Segment Type: other
Provision Reference: 
Character Range: 7806–10956

D8 - 1971, "Hose Couplings for use with Vacuum and Air-pressure Braking Systems on Prime-movers, Trailers and Semi-trailers" where applicable or alternatively Duomatic or compatible coupling may be used

         Couplings must be configured as follows:

         Vacuum systems, 'Supply Line 35/...', male connector;

         Compressed air systems, 'Supply Line 35/...', female connector; or palm type without inboard interference lug: or Duomatic female connector, Part No. 452 802 0000 or equivalent.

5.1.9.                              Where the vehicle is equipped to tow a trailer which uses air at a positive pressure, the 'Established Retardation Coefficient' of the 'Service Brake System' measured using the general test conditions of part 7 and the particular test conditions of clause 8.18.1 must be between the upper and lower boundaries of Figure 1 for each value of 'Control Signal' used.
5.1.9.1.                        Where the vehicle is a variant of a previously tested vehicle and the effects of the changes on braking performance are known by a test conducted on a complete vehicle, a component or a sub-assembly of components, the requirements of this clause can be met by 'Approved' calculations.
5.1.10.                          Where the vehicle has a 'Rated Towing Capacity' of more than 4.5 tonnes, either:
5.1.10.1.                    the vehicle must have certification which provides for the operation of trailer brakes using air at a positive pressure as described in clause 5.1.9 or
5.1.10.2.                    the 'Manufacturer' must supply to the 'Administrator' sufficient data to allow the vehicle's 'Service Brake System' to be modelled under laden braking conditions.  Provision of the data derived from the tests performed as described by clause 8.18.2 will be considered as sufficient to meet the requirements of this clause.
5.1.10.3.                    Where the vehicle is a variant of a previously tested vehicle and the effects of the changes on braking performance are known by a test conducted on a complete vehicle, a component or a sub-assembly of components, the requirements of this clause can be met by 'Approved' calculations.
5.1.11.                          Where the 'Service Brake System' incorporates a single 'Brake Power Unit 35/...' an 'Audible Indicator' must be provided which must operate at all times when the service brake failure 'Visible Indicator' operates as specified in clause 5.2.
5.1.12.                          Each air reservoir in a compressed air 'Brake System' must be fitted with a manual condensate drain valve at the lowest point. An automatic condensate valve may be fitted provided it also drains the lowest point.  The manual drain valve may be incorporated in the automatic valve.
5.2.                                    'Visible Indicator'
5.2.1.                              The 'Visible Indicator' must operate whenever any of the conditions listed in clauses 5.2.2 to 5.2.4 as applicable occur while the ignition or electrical control switch is in the "engine on" position or while the engine is running.
5.2.2.                              For a 'Service