Braking Standard to Affect Towed Implement Makers

A years-long industry project to develop five new braking standards for agriculture equipment is complete.

The American Society of Agricultural and Biological Engineers (ASABE) developed the standards in consultation with our Association, the Agricultural Manufacturers of Canada, and the Association of Equipment Manufacturers.

The new standards replace ANSI/ASAE S365.9, Braking System Test Procedures and Braking Performance Criteria for Agricultural Field Equipment. They is expected to affect manufacturers of towed implements.
The standards, now classified as ANSI/ASABE S648, define specific requirements, minimum performance criteria, and performance test procedures to accommodate the evolving design and capacities of agricultural field equipment.

They include:
Part 1: General Requirements
Defines terms and establishes common requirements, minimum performance criteria and performance test procedures that are common to agricultural field equipment.

Part 2: Requirements for Agricultural Tractors
Establishes specific requirements, minimum performance criteria and performance test procedures that are common to agricultural tractors when used in conjunction with ANSI/ASABE S648-1.

Part 3: Requirements for Self-Propelled and Special Self-Propelled Equipment
Establishes specific requirements, minimum performance criteria and performance test procedures that are common to self-propelled and special self-propelled agricultural equipment when used in conjunction with ANSI/ASABE S648-1.

Part 4: Towed Vehicles Requirements
Defines the minimum stopping requirements related to braking of towed agricultural field equipment hereafter referred to as towed vehicles when used in conjunction with ANSI/ASABE S648-1. Part 4 also contains new decal requirements and changes to messages in operators’ manuals.

Part 5: Requirements for the Interface Between Towing and Towed Vehicles
When used in conjunction with ANSI/ASABE S648-1, defines requirements for interfacing service and parking brake systems on towing vehicles with service and parking brake systems on towed vehicles.

Association consultant John Fisher offers this additional guidance. Implement brakes are required when:

  • Implement maximum mass exceeds 1.5 times the mass of the towing tractor, or
  • Maximum implement towing speed exceeds 20 or 25 mph.

For implements that meet that criteria, manufacturers should review parts one, four and five of the standard.

In other standard news, ASABE recently published a revision to S279.18—Agricultural Field Equipment Lighting and Marking Requirements.
The standard now requires towed implements to have a slow-moving vehicle (SMV) sign mounted on the rear of the implement and a speed identification symbol (SIS) indicating the maximum technically permissible towing speed.

Members of this Association who are not also members of ASABE can receive at no cost the compilation of industry standards produced by ASABE—a $650 value. The resource contains 275 current standards, engineering practices, and data. Contact Rachel Boehm at Rachel@FarmEquip.org, or (314) 878-2304.