SAE AS4059D-2001
Aerospace Fluid Power - Cleanliness Classification for Hydraulic Fluids

Standard No.

SAE AS4059D-2001

Release Date

2001

Published By

Society of Automotive Engineers (SAE)

Status

Withdraw

Replace By

SAE AS4059E-2005

Latest

SAE AS4059G-2022

Scope

This SAE Aerospace Standard (AS) defines cleanliness levels for particulate contamination of hydraulic fluids and includes methods of reporting data relating to the contamination levels. The contamination levels selected are an extension and simplification of the widely accepted NAS 1638 cleanliness levels. The intent of this document is to establish the minimum information required to allow valid comparison and interpretation of contamination levels in hydraulic systems that require contamination control of particulate to insure system performance and reliability.

SAE AS4059D-2001 history

• 2022 SAE AS4059G-2022 Contamination Classification for Hydraulic Fluids
• 2020 SAE AS4059F-2020 Aerospace Fluid Power - Contamination Classification for Hydraulic Fluids
• 2013 SAE AS4059F-2013 Aerospace Fluid Power - Contamination Classification for Hydraulic Fluids
• 2011 SAE AS4059E-2011 Aerospace Fluid Power - Cleanliness Classification for Hydraulic Fluids
• 2005 SAE AS4059E-2005 (R) Aerospace Fluid Power - Cleanliness Classification for Hydraulic Fluids
• 2001 SAE AS4059D-2001 Aerospace Fluid Power - Cleanliness Classification for Hydraulic Fluids
• 2000 SAE AS4059C-2000 Contamination Classification for Hydraulic Fluids
• 1995 SAE AS4059B-1995 Aerospace-Cleanliness Classification for Hydraulic Fluids
• 1990 SAE AS4059A-1990 AEROSPACE-CLEANLINESS CLASSIFICATION FOR HYDRAULIC FLUIDS
• 1988 SAE AS4059-1988 AEROSPACE-CLEANLINESS CLASSIFICATION FOR HYDRAULIC FLUIDS