This SAE Information Report is intended to help promote the proper use of Predictive and Preventive Diagnostic Maintenance in hydraulic systems. This document can be used as a selection guide for the level of diagnostic equipment and methods to specify for a given application. Each application has its own particular requirements.
SAE J1655-1996 Referenced Document
ISO 4402:1991 Hydraulic fluid power; calibration of automatic-count instruments for particles suspended in liquids; method using classified AC fine test dust contaminant
ISO 4406:1987 Hydraulic fluid power; Fluids; Method for coding level of contamination by solid particles