Document ID: chunk:federal_register_of_legislation:F2006L03060:body:0:p7
Version: federal_register_of_legislation:F2006L03060
Segment Type: other
Provision Reference: 
Character Range: 19303–22211

Each 'Unique' 'Brake System' fitted to each trailer type shall be shown to comply with clause 38.3.1.1. A trailer will be considered as being of the same type where it has the same number of 'Axles' and 'Gross Trailer Mass', and where no substantial change has been made to either trailer length, height, tyre size or suspension.

Trailers complying with ECE 13/05 shall be taken as meeting the requirements of this Rule so long as any 'Variable Proportioning Brake Systems' fitted are able to be held in the 'LTM' position and adjacent to the Trailer 'Control Line' connectors having the words: "Ensure Load Proportioning Brake System on Trailer is HELD in LOADED POSITION if Tow Vehicle NOT Fitted with Load Proportioning".

38.3.1.3.                    Where minor changes have been made and compliance with clause 38.3.1.1 (test requirements) must be shown, compliance in relation to an 'Approved Brake System' for a trailer type may be demonstrated by supplying the evidence needed to justify the maintenance of performance standards in the areas affected by the changes.

38.3.1.3.1.              For example:

            (a)  if an 'Approved Brake System' were fitted to a substantially shorter 'Semi-trailer' the suitability of a 'Brake System' having the same service brake effectiveness would have to be supported.

            (b)  if trailer length were substantially increased, time response data might be required.

            (c)  if an auxiliary 'Parking Brake System 38/00' control were fitted, evidence would need to be provided to show that the 'Approved' Brake System' performance aspects had not been degraded.

38.3.1.3.2.              Where 'Axle' types are to be substituted for one another, the comparison for service brake effectiveness should be on the basis of 'Established Retardation Coefficient'. In the case of air 'Brake Systems' having service brake effectiveness specified as ARC, ERC may be determined by calculating K2 in the equation below.

where

S is stopping distance from initial movement of the 'Control' in metres.

V is the initial velocity, in km/h

K1 is a constant related to time delay where at a value of 0.09 is equal to a time delay of 0.32 second

K2 is a constant related to established retardation and at a value of 115 is equivalent to 0.45 g (4.4 m/s2).

38.3.1.3.3.              In the case of 'Brakes' friction materials, the substitute material would have to be identical in regard to its SAE J 866a - "Friction Identification System for Brake Linings and Brake Blocks for Motor Vehicles" (September 1966) and to meet or exceed the requirements of SAE J 840c - "Test Procedures for Brake Shoe and Lining Adhesives and Bonds' (May 1971), and SAE J 998 "Minimum Requirements for Motor Vehicle Brake Linings" (January 1968), or other international standards.

38.3.1.3.4.              Submissions for compliance approval based in part