Table of Contents

1 -  AS/NZS 4968.2:2003 HEAVY ROAD VEHICLES-MECHANICAL COUPLING BETWEEN ARTICULATED VEHICLE COMBINATIONS - TESTING AND...
4 -  PREFACE
5 -  CONTENTS
6 -  1 SCOPE
6 -  2 REFERENCED DOCUMENTS
6 -  3 DEFINITIONS
7 -  3.1 Attachment sections
7 -  3.2 Baseplate
7 -  3.3 Coupler plate
7 -  3.4 Fifth wheel
7 -  3.5 Fifth wheel assembly
7 -  3.6 Shall
7 -  3.7 Should
7 -  3.8 Slide plate
7 -  3.9 Slide rails
7 -  3.10 Sliding fifth wheel
7 -  3.11 Turntable
11 -  4 GENERAL REQUIREMENTS AND RECOMMENDATIONS
11 -  4.1 Position and height
11 -  4.2 General method of mounting
11 -  4.3 Typical method of mounting a fifth wheel to a prime mover
11 -  5 STRENGTH REQUIREMENTS
11 -  5.1 Fastening of assembly to vehicle chassis
12 -  5.2 Bolting requirements
12 -  5.3 Fastening of attachment angles and fishplates
12 -  5.4 Clearance to top of chassis side member flange
12 -  5.5 Clearance around suspension mountings
12 -  5.6 Length of subchassis members and attachment angles
13 -  6 TURNTABLE BASE FIFTH WHEELS
13 -  6.1 General
13 -  6.2 Turntable lock
13 -  7 SLIDING ASSEMBLIES
13 -  7.1 General
13 -  7.2 Angles and fittings
14 -  7.3 Slide stops
14 -  7.4 Locking of slide plate on slide rail
14 -  8 PRACTICES NOT RECOMMENDED
14 -  9 RATING
14 -  10 TEST PERFORMANCE
15 -  11 FUNCTIONAL AND DIMENSIONAL REQUIREMENTS
15 -  11.1 Functional
15 -  11.2 Dimensional
16 -  APPENDIX A - DYNAMIC TEST METHOD
16 -  A1 SCOPE
16 -  A2 PRINCIPLE
16 -  A3 APPARATUS
16 -  A4 PROCEDURE
16 -  A4.1 Inspection before testing
16 -  A4.2 Installation of assembly
16 -  A4.3 Application of loadings
17 -  A4.4 Inspection
17 -  A5 REPORT
19 -  APPENDIX B - STATIC OVERTURNING MOMENT TEST METHOD
19 -  B1 SCOPE
19 -  B2 PRINCIPLE
19 -  B3 APPARATUS
19 -  B4 PROCEDURE
19 -  B4.1 Inspection before testing
19 -  B4.2 Installation of assembly
19 -  B4.3 Application of loading
20 -  B4.4 Inspection after testing
20 -  B5 REPORT

Abstract

Specifies performance requirements and recommendations for the installation of fifth wheel assemblies. Applies to fifth wheel assemblies used with 50 mm, 75 mm and 90 mm kingpins for articulated vehicle combinations used in heavy road vehicles, B-doubles and road trains, in normal use on both sealed and unsealed roads.

Scope

This Standard sets out performance requirements and recommendations for the installation of fifth wheel assemblies. Alternative designs and methods of assembly which do not comply with a specific requirement of this Standard or are not mentioned in it, but which give at least equivalent results are not prohibited. This Standard applies to fifth wheel assemblies used with 50 mm, 75 mm and 90 mm kingpins (referred to in AS/NZS 4968.3) for articulated vehicle combinations used in heavy road vehicles, B-doubles and road trains, in normal use on both sealed and unsealed roads.
The requirements cover dimensional standards for interchangeability, strength testing and rating.
NOTES:
1 Additional components not specified or supplied by the fifth wheel manufacturer for a typical installation but necessary for a specific installation (e.g. attachment brackets) are not covered by this Standard.
2 Methods for determining D-value for fifth wheel assemblies are specified in AS/NZS 4968.1.
3 Criteria for 50 mm, 75 mm and 90 mm kingpins are specified in AS/NZS 4968.3.
4 Design criteria for trailer skid plates are specified in AS/NZS 4968.3.

General Product Information

Published
Document Type	Standard
Status	Current
Publisher	Standards Australia
ProductNote	Pending Revision indicates that as a result of the Aged Standards review process, the document needs updating. If no project proposal, meeting the quality criteria, is received within the 12 month timeframe, the document shall be withdrawn.
Pages
ISBN
Committee	ME-053
Supersedes	AS 4235-1994 AS 2175-1995 DR 01271 AS 1771-1996 AS 1773-1996 DR 01270