Standard
Track updates
AS 3450:2021
[Current]Earth-moving machinery — Wheeled or high-speed rubber-tracked machines — Performance requirements and test procedures for brake systems (ISO 3450:2011, MOD)
Adopts ISO 3450:2011 with modifications for Australia, which specifies the minimum performance requirements and test procedures for the service, secondary and parking brake systems of wheeled and high-speed rubber-tracked earth-moving machines, for the uniform assessment of those brake systems.KEYWORDS: earth-moving brake requirements tests
Published: 04/06/2021
Pages: 36
Table of contents
Cited references
Content history
Table of contents
Header
About this publication
Preface
National Foreword
Foreword
1 Scope
2 Normative references
3 Terms and definitions
4 General requirements
4.1 Required brake systems
4.1.1
4.1.2
4.1.3
4.1.4
4.1.5
4.2 Common components
4.3 Brake control systems
4.4 Service brake systems
4.5 Secondary brake systems
4.6 Parking brake systems
4.7 Hydrostatic brake systems
4.8 Systems with combined brake and steer function
4.9 Performance and warning devices for stored energy sources
4.10 Braking systems with electronic MCS
4.11 Machines designed to tow trailers
4.12 Machine instructions and labels
4.12.1 General
4.12.2 Braking system and periodic verification instructions
4.12.3 Additional instructions for machines designed to tow trailers
4.13 Estimating brake slope capability
5 Test conditions
5.1 Overall test parameters
5.2 General test conditions
5.3 Test course
5.4 Machine test configuration
6 Performance tests
6.1 General
6.2 Braking system controls
6.3 Stored energy sources
6.3.1 Service brake system recovery capacity
6.3.2 Secondary brake system capacity
6.3.3 Test performance
6.4 Holding performance
6.4.1 General
6.4.2 Service and parking brakes
6.4.3 Brake holding performance tests
6.4.4 Durability test of parking brake when used as secondary brake
6.5 Stopping performance
6.5.1 General
6.5.2 Service brake systems
6.5.3 Secondary brake systems
6.5.4 Heat fade test for all machines except rigid-frame and articulated-frame dumpers with machine test mass >32 000 kg
6.5.5 Brake tests for rigid-frame and articulated-frame dumpers with machine test mass >32 000 kg
6.6 Alternative testing
6.6.1 Lab testing
6.6.2 Alternative secondary brake testing for hydrostatic or similar propel drive machines
7 Test report
Annex A
A.1 General
A.2 Terms and definitions
A.2.1 peak deceleration
A.3 Brake system controls (see 4.3)
A.4 Service brake systems (see 4.4)
A.4.1 Stopping performance
A.4.2 Holding performance
A.5 Secondary brake systems (see 4.5)
A.6 Parking brake systems (see 4.6)
A.7 Hydrostatic brake systems (see 4.7)
A.8 Machines designed to tow trailers (see 4.11)
A.9 General test conditions (see 5.2)
A.10 Performance tests (see Clause 6)
A.10.1 Holding performance (see 6.4)
A.10.2 Stopping performance (see 6.5)
A.10.2.1 Service brakes (see 6.5.2)
A.10.2.2 Secondary brakes (see 6.5.3)
A.11 Test report (see Clause 7)
A.12 Coal/gassy mining applications
Annex B
Appendix ZZ
ZZ.1 Scope
ZZ.2 Variations
Appendix ZA
ZA.1 Scope and general
ZA.1.1 Scope
ZA.1.2 Terms and definitions
ZA.1.3 General
ZA.1.4 Test frequency
ZA.1.5 Trending
ZA.2 Procedure
ZA.2.1 General (functionality) tests
ZA.2.2 Performance (practical) tests
ZA.2.3 Test course
ZA.2.4 Machine mass
ZA.2.5 Instrumentation
ZA.2.6 Service brake dynamic testing
ZA.2.6.1 Test details
ZA.2.6.2 Pass/fail criteria
ZA.2.6.3 Secondary brake test procedure
ZA.2.7 Retarder test procedure
ZA.2.8 Parking brake test procedure
ZA.3 Record keeping for in-service brake testing
Bibliography
Cited references in this standard
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