ISO 4409:1986

Hydraulic fluid power — Positive displacement pumps, motors and integral transmissions — Determination of steady-state performance

Specifies methods for determining the performance and efficiency of equipment, and applies to components having continuously rotating shafts. Describes requirements for test installations, test procedures, and the presentation of test results. Annex A gives guidance as to the use of practical units, annex B contains information on errors and classes of measurement accuracy, and annex C provides a pretest checklist of those items on which agreement is recommended between the parties concerned.