ASABE to Develop New Braking Standards

Monday, March 19, 2018
ASABE to Develop New Braking Standards

ST JOSEPH, MICHIGAN—The American Society of Agricultural and Biological Engineers (ASABE) has initiated the development of five new standards for braking systems on agricultural equipment. The documents could have significant impact on some manufacturers, and equipment designers are strongly encouraged to monitor progress of the projects.

The proposed standards will replace ANSI/ASAE S365.9, Braking System Test Procedures and Braking Performance Criteria for Agricultural Field Equipment. They will provide updated braking requirements, add allowance for higher-speed, light-weight towed vehicles, and define braking interfaces between towed and towing equipment.

Proposed titles are:

  • Agricultural Field Equipment Braking Part 1: General Requirements
  • Agricultural Field Equipment Braking Part 2: Requirements for Agricultural Tractors
  • Agricultural Field Equipment Braking Part 3: Requirements for Self-Propelled and Special Self-Propelled Equipment
  • Agricultural Field Equipment Braking Part 4: Requirements for Towed Equipment
  • Agricultural Field Equipment Braking Part 5: Requirements for the Interface between Towing Equipment and Towed Equipment

The standards will provide minimum requirements and normative references, define terms and definitions, and establish general test procedures for the performance of braking systems used on agricultural field equipment as defined in ANSI/ASAE S390.6 (ISO 12934:2013), Tractors and machinery for agriculture and forestry - Basic types – Vocabulary.

The proposed standards are expected to improve braking performance and could result in significant changes for some manufacturers. It is strongly suggested that equipment designers remain cognizant of these projects as the content is further developed by the ASABE Agricultural Equipment Braking committee. Further press releases will be forthcoming as this work unfolds.

ASABE is recognized worldwide as a standards developing organization for food, agricultural, and biological systems, with more than 260 standards currently in publication. Conformance to ASABE standards is voluntary, except where required by state, provincial, or other governmental requirements, and the documents are developed by consensus in accordance with procedures approved by the American National Standards Institute. For information on this or any other ASABE standard, contact Scott Cedarquist at 269-932-7031, A current listing of all ASABE standards projects can be found on the ASABE web site at

ASABE is an international scientific and educational organization dedicated to the advancement of engineering applicable to agricultural, food, and biological systems. Further information on the Society can be obtained by contacting ASABE at (269) 429-0300, emailing or visiting