This SAE Recommended Practice describes the type of equipment commonly used with towing equipment, provides information to calculate safe steering loads, and outlines design criteria.
SAE J1142-1994 Referenced Document
SAE J1041-1991 Braking System Test Procedures and Braking Performance Criteria for Agricultural Tractors
SAE J1085 Testing Dynamic Properties of Elastomeric Isolators*, 2017-02-01 Update
SAE J1143-1994 (R) Towed Vehicle/Tow Equipment Attachment Test Procedure - Passenger Cars, Vans, and Light Duty Trucks, Recommended Practice February 1994