Overview of SAE J728-1990 This SAE standard provides standardized names for major components specific to the scraper portion of tractor-scrapers. It references SAE J1057 for overarching terminology of earthmoving machines. The standard includes illustrative figures for different scraper types, but…

Overview and Rationale of SAE J740 SAE J740 is a surface vehicle standard that specifies the dimensions and tolerances for countersunk square holes used in cutting edges and end bits on earthmoving machinery. Originally issued in 1958, the standard was…

Industrial compressed air powers tools, conveyors, and process equipment across workshops, construction sites, and manufacturing plants. But not all compressed air is equal. Contaminants such as solid particles, water (liquid and vapor), and oil (aerosol, liquid, vapor) can degrade equipment…

When retrofitting automotive air-conditioning systems with alternative refrigerants, the compatibility of system materials becomes a critical design consideration. The SAE J1662-2011 recommended practice (Stabilized 2011) provides essential guidance on material interactions to ensure long-term reliability and safety. This article interprets…

Understanding the Standard’s Scope SAE J731-2007 was a surface vehicle standard that defined the names of major components and parts specific to loaders, a common type of earthmoving machinery. First issued in 1957 and last reaffirmed in 1985, the standard…

This article provides an overview of common port connection types used in truck, bus, truck-trailer, and converter dolly air brake systems, based on SAE J3244 (2022). Whether you’re designing a new system or maintaining existing equipment, understanding the differences between…

SAE J2847-1 (revised August 2019) defines the communication requirements for smart charging of plug-in electric vehicles (PEVs) using the Smart Energy Profile 2.0 (SEP2.0) protocol. This standard enables utility-controlled charging, demand response, and pricing programs while ensuring grid stability and…

The Global Automotive Telematics Standard (GATS) represents a comprehensive message set designed for deployment on GSM-based mobile phone systems in European markets. Meanwhile, the SAE ATIS family of standards (J2313, J2353, J2354, J2369, J2374) defines comparable traveler information services for…

Water contamination in diesel and biodiesel fuel systems can lead to corrosion, injector failure, and microbial growth. The SAE J1839-2010 standard provides a laboratory test procedure for evaluating the undissolved water removal performance of fuel/water separators under controlled conditions, specifically…

SAE J1635 provides a standardized method for subjectively evaluating a vehicle’s starting behavior and driveability after a prescribed soak at a set ambient temperature. This recommended practice helps engineers and technicians assess cold start reliability and identify driveability defects such…

The SAE J2777-2022 standard offers a comprehensive recommended practice for correlation between climatic wind tunnels used for vehicle testing. This article outlines the critical elements of the standard to help engineers and test facilities achieve consistent, repeatable results across different…

This article summarizes the key procedures defined in SAE J2407, a recommended practice for the installation and adjustment of pull-type single- and twin-plate truck clutches. Aimed at medium-duty (Class 6 & 7) and heavy-duty (Class 8) vehicles, the standard covers…

SAE J1386 (cancelled November 2007) provides a recommended practice for classifying agricultural wheeled tractors based on unballasted mass for the purpose of vibration testing of operator seats. This classification system, later superseded by ISO 5007, remains a key reference for…

The cleanliness of new hydraulic fluid is a critical factor in system reliability, component life, and overall performance. SAE J1277:2024, titled “Method for Assessing the Cleanliness Level of New Hydraulic Fluid,” provides a comprehensive and repeatable procedure for quantifying contamination…

This recommended practice from SAE J421-2018 provides a structured approach for rating steel cleanliness using magnetic particle inspection. It outlines procedures for sampling, specimen preparation, magnetization, and indication counting to assess non-metallic inclusions. Sample Selection and Specimen Preparation Sampling should…

Note: SAE J2057‑2 (202212) is an information report, not a recommended practice. It is intended to help system engineers understand and address issues specific to Class A multiplexed actuators. Class A Multiplexing Actuators: Overview and Actuator Types Class A multiplexing…

This article explores the two prevalent multiplex architecture strategies for vehicle networks as described in SAE J2057-4: Single Network Architecture and Multiple Network Architecture. We examine the three classes of multiplex networks, the trade-offs between architectures, and key design considerations…