BS 4639:1987
Current
The latest, up-to-date edition.
Specification for brakes and braking systems for towed agricultural vehicles
Hardcopy , PDF
English
31-03-1987
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Foreword
Committees responsible
Specification
1. Scope
2. Definitions
3. Braking requirements for towed agricultural vehicles
4. Braking requirements for agricultural towing
vehicles
5. Characteristics and performance of complete braking
systems
6. Tests and test report
Appendices
A. General conditions for tests
B. Method of testing the braking force of service
brakes
C. Method of testing the resistance to gravity of
parking brakes
D. Specimen test report
Performance requirements of the recommended single line hydraulic system. General method of test and service brake procedure.
| Committee |
AGE/32
|
| DevelopmentNote |
Supersedes 82/77040 DC and BS 4639(1970) (08/2005) Reviewed and confirmed by BSI, February 2011. (01/2011)
|
| DocumentType |
Standard
|
| Pages |
14
|
| PublisherName |
British Standards Institution
|
| Status |
Current
|
| Supersedes |
This British Standard specifies requirements for the brakes and braking systems of towed agricultural vehicles in combination with agricultural towing vehicles (normally agricultural tractors).
It contains braking requirements for the towed vehicle and for the towing vehicle to ensure their compatibility and requirements for the characteristics and performance of the complete braking system.
Conditions of test are given in Appendix A and tests for service brakes and parking brakes are given in Appendix B and Appendix C respectively. A specimen test report is given in Appendix D.
NOTE The titles of the publications referred to in this standard are listed on the inside back cover.
| BS AU 138a:1980 | Specification for dimensions of \'contact\' type couplings for air pressure braking systems on trailers and semi-trailers and their towing vehicles, and the arrangement of these couplings on articulated and drawbar combinations |
| ISO 5676:1983 | Tractors and machinery for agriculture and forestry — Hydraulic coupling — Braking circuit |
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