This article provides an overview of SAE J703-2015, a recommended practice that establishes requirements for liquid fuel systems in trucks and truck tractors. It covers construction, installation, safety features, and testing, aligning with Federal Motor Carrier Safety Regulations (FMCSR) while…

SAE J706-2017 is a mature standard that defines rating and specification requirements for new winches designed for intermittent pulls and lifts. It applies to winches driven by any manufacturer-recommended power source and covers everything from safety brake systems to published…

SAE J700-2020 establishes dimensional and flatness requirements for upper coupler kingpins used in commercial trailers and semitrailers in the unladen condition. This standard ensures proper coupling between the trailer and fifth wheel, promoting safety and durability. The key specifications include…

This SAE Information Report specifies dimensional standards for the interchange coupling between truck tractors and semitrailers. Developed jointly by the Automobile Manufacturers Association, American Trucking Association, and Truck Trailer Manufacturers Association, the standard aims to achieve equipment interchangeability while complying…

🛠️ Standard Stabilized SAE J702-2013 has been declared “Stabilized” by the SAE Truck and Bus Brake Supply and Control Components Committee. This indicates the technology and recommended practices are mature and not expected to change in the foreseeable future. Users…

SAE J694‑2021 is the latest revision of a long‑standing recommended practice that defines dimensions and tolerances for the interface between disc wheels and hubs or drums in truck and bus applications. Updated in April 2021, it adds guidance on two‑piece…

SAE J697 is a surface vehicle recommended practice that specifies requirements for safety chains on full trailers and converter dollies. First issued in 1958 and stabilized in 2011, this standard remains a key reference for towing safety professionals. Its primary…

SAE J689-2009, now cancelled, provided minimum static design guidelines for curbstone clearance, approach, departure, and ramp breakover angles for passenger cars, multipurpose passenger vehicles, and light trucks. Developed by the SAE Bumper Standards Committee, this Recommended Practice aimed to minimize…

This article details the now-cancelled SAE J690 standard, which defined the methodology for certifying maximum net horsepower in motor trucks and truck tractors. First issued in 1941, it provided a consistent framework for determining net brake horsepower delivered to the…

SAE J693-2011 is a stabilized information report that provides a consistent method for measuring the overall width of trucks across dual tires. Originally issued in 1954, it has been declared stabilized due to committee inactivity, meaning it is no longer…

SAE J684 is a critical standard for engineers working with light- and medium-duty towing applications. Officially titled “Trailer Couplings, Hitches, and Safety Chains—Automotive Type,” it covers trailers with a Gross Vehicle Weight Rating (GVWR) up to 10,000 lb (4540 kg).…

SAE J686-2012 is a stabilized standard for motor vehicle license plates, initially issued in 1954 and stabilized in 2012. It defines requirements for license plate dimensions, materials, and performance to ensure consistent vehicle identification across jurisdictions. stabilization indicates that the…

Scope and Definitions 🛠️ SAE J68-2019 outlines standardized tests and performance requirements for electromechanical switching devices used on snowmobiles as defined in SAE J33. The standard covers the following switch types: Headlamp beam switch Stop lamp switch Accessory switch Ignition…

1. Standard Scope and Rationale This standard, reaffirmed in 2024, applies to on-highway trucks and truck-tractors with air brake systems and a GVWR of 26,000 lb or more. It focuses exclusively on the two primary air brake controls: the parking…

SAE J682 is a recommended practice that sets requirements for reducing water spray and stone throw from the rear wheels of heavy vehicles such as trucks, buses, and trailers. By defining performance and installation criteria for mudguards and splash guards,…

The SAE J671 standard provides a comprehensive classification system and performance requirements for mastic-based vibration damping materials and underbody coatings used in motor vehicles. It defines a numbering scheme that allows engineers to specify material properties based on decay rate…

Established in 1939 and stabilized in August 2011, SAE J678 is a Surface Vehicle Recommended Practice that defines requirements and guidelines for speedometers and tachometers used in automotive applications. As a stabilized document, it reflects mature technology and is no…