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Air Conditioning Service Procedures for Heavy duty and Off-Highway work Machines using R-134a refrigerant

This recommended practice provides technicians with safe and efficient techniques and general equipment recommendations for servicing Mobile Air Conditioning (MAC) systems in heavy duty and off-highway work machines. Presently, R-134a is the only approved refrigerant for use in mobile heavy duty and off-highway equipment and therefore this document primarily covers the servicing of R-134a systems. Since the technician may encounter other refrigerants a brief explanation on the identification safe handling of each refrigerant will be introduced.

Motor Vehicle Measurement Certification Standard

This recommended practice applies to any vehicle manufacturer that chooses to publish vehicle dimensions and specifications that may influence customer purchase decisions. The intent is to define standardized vehicle dimensions that reflect showroom conditions and / or dimensions experienced during purchase conditions and also include published dimensions used in marketing / advertising materials irrespective of communications media that influence purchase decisions This document also provides a method to certify OEM and 3rd party compliance with recommended SAE and ISO measurement practices for vehicle dimensions commonly reported publically for marketing and competitive vehicle analysis

Coiled Tubing Assemblies for Heavy Duty Air Brake Applications

This SAE Standard establishes the minimum performance and endurance requirements for coiled air brake tubing assemblies used for hookup between tractors, trailers and converter dollies. The Standards SAE J844 and SAE J246 along with J1131 must be consulted to determine the complete performance and endurance requirements of individual components of the system. Related TMC Recommended Practices may be consulted for information associated with selection, installation and inspection of these assemblies. This document is intended to set out requirements for the majority of conditions rather than for specialized applications or environments.

Performance Requirements for Nonmetallic Air Brake System Tubing

This SAE Standard covers the minimum requirements for nonmetallic tubing as manufactured for use in air brake systems which tubing is different from that described in SAE J844. It is not intended to cover tubing for any portion of the system which operates continuously below - 40 degrees C or above +93 degrees C, above a maximum working gage pressure of 1.0 MPa, or in an area subject to attack by battery acid. This tubing is intended for use in the brake system for connections, which maintain a basically fixed relationship between components during vehicle operation. Coiled tube assemblies required for those installations where flexing occurs are covered by this document, SAE J1131 and SAE J2494-3, to the extent of setting minimum requirements on the essentially straight tube and tube fitting connections which are used in the construction of such assemblies.

Off-Road Self-Propelled Work Machines Operator enclosure environment Part 4:Heating, ventilating and air conditioning (HVAC) test method and performance

J3078/4 specifies a uniform test method for measuring the contribution to operator environmental temperature provided by a heating, ventilating and air conditioning system operating in a specific ambient environment. The method might not determine the complete climatic environment of the operator since this is also affected by heat load from sources other than those on the machine, for example solar heating. J3708/6 is to be used in conjunction with J3078/4 to determine more accurately the complete heat loading on the operator enclosure. Minimum performance levels for the machine’s operator enclosure heating, ventilating and air conditioning systems are established in J3708/4.

Balance Weight and Rim Flange Design Specifications, Test Procedures, and Performance Recommendations for Heavy Vehicle Applications

This SAE Recommended Practice is intended to serve as a guide for standardization of features, dimensions, and configurations of balance weights for aluminum and steel wheels intended for use on Heavy Truck/Vehicles (Class 5-8) to assure good installation and retention of the balance weight. This document also provides test procedures and minimum performance requirements for testing balance weight retention.