The testing technique outlined in this SAE Recommended Practice was developed as part of an
overall program for testing and evaluating fuel consumption of heavy-duty trucks and buses. The technique
outlined in this document provides a general description of the type of equipment and facility which is
necessary to determine the power consumption of these engine driven components.
It is recommended that the specific operating condition suggested throughout the test be carefully reviewed on
the basis of actual data obtained on the specific vehicle operation.
This document covers evaluation techniques for determining the power consumption characteristics of
hydraulic pumps used on heavy-duty trucks and buses.
1.1 Purpose—The purpose of this document is to expand on the scope of the existing SAE J745. All of the
specifications and apparatus utilized in that document for construction and industrial machinery can be utilized
in this procedure. Information presented in the manner outlined as follows can be used to evaluate the
hydraulic power requirements of fixed or variable-displacement pumps after the vehicle duty cycle has been
determined.
SAE J1341-1981 history
2023SAE J1341-2023 Test Method for Measuring Power Consumption of Hydraulic Pumps for Trucks and Buses
2012SAE J1341-2012 Test Method for Measuring Power Consumption of Hydraulic Pumps for Trucks and Buses
2003SAE J1341-2003 Test Method for Measuring Power Consumption of Hydraulic Pumps for Trucks and Buses
1996SAE J1341-1996 TEST METHOD FOR MEASURING POWER CONSUMPTION OF HYDRAULIC PUMPS FOR TRUCKS AND BUSES
1990SAE J1341-1990 TEST METHOD FOR MEASURING POWER CONSUMPTION OF HYDRAULIC PUMPS FOR TRUCKS AND BUSES
1981SAE J1341-1981 Test Method for Measuring Power Consumption of Hydraulic Pumps for Trucks and Buses