OilCheck Pty Ltd - Hydraulic / Turbine Oils

Hydraulic Oils

Hydraulic and Turbine oils perform several crucial tasks. They provide the required lubrication and heat transfer in the compartments to achieve optimum performance. The following Hydraulic and Turbine oil schedules have been derived. Scheduled Oil Analysis is an excellentway to maintain the balance between the premature failure and proactive and reactive maintenance.

Testing Levels
Level 1	An analysis schedule that provides information to assess the condition of the compartment with respect to contamination and wear metal generation. Condition of the lubricant is not under scrutiny.
Level 2	Provides an assessment of the equipment condition as per Schedule 1 plus an overview of the lubricant condition and compliance to viscosity grade and acidity.
Level 3	Provides key performance indicators of the oil and the compartment condition with respect to contamination,wear and characteristics. Ideal schedule for ensuring compliance with OEM or maintenance warranty conditions.

RECOMMENDED TESTING SCHEDULE		HYDRAULIC / TURBINE OIL	TESTING LEVELS
Analysis	Method	Explanation	Level 1	Level 2	Level 3
Moisture Content	ASTM D6304C	Moisture determination using coulometric Karl Fisher (KF) method (sometimes referred to as KF water)expressed in % mass or mg/kg (ppm) where low levels (less than 200 mg/kg) is expected.	YES	YES	YES
Wear Metals	ASTM D5185	The analysis of wear metal concentration in sample using Inductively Coupled Plasma- Optical Emission Spectroscopy (ICP-OES).	YES	YES	YES
Contamination Metals	ASTM D5185	The analysis of contaminant metal concentration in sample using Inductively Coupled Plasma- Optical Emission Spectroscopy (ICP-OES).	YES	YES	YES
Additive Metals	ASTM D5185	The analysis of additive metal concentration in sampleusing Inductively Coupled Plasma- Optical Emission Spectroscopy (ICP-OES).	YES	YES	YES
Oxidation and Nitration Values	JOAP	By examining the "fingerprint" of a lubricant by Fourier Transform Infrared (FTIR) its characteristics can be established. Oxidation and nitration values in new oils reflect the presence of additives and base oil compositions.	YES	YES	YES
Viscosity @ 40°C or 100°C	ASTM D445	Oil tested at 40°C to assess compliance to specification of ISO grade oil and at 100°C for SAE oil.		YES	YES
TAN	ASTM D664	Measures the Total Acid Number or Neutralisation Number by titration.			YES
Particle Count	ASTM D6786	A count of the number of particles with the ranges stipulated by the ISO 4406 and the SAE AS 4059 standards. The range tested overall is between 4 and 400 micron (μm) in size. Report lists both the ISO 4406 as a three number classification (e.g. 20/17/15 for >4/>6/>14 μm) and SAE AS 4059 Cleanliness Codes ISO= International Standards Association SAE AS = Society of Aerospace Engineering Aeroscape Standard			YES
Retained Solids	ASTM D4898	The amount of solids in the oil that is greater than 0.8μm. Uses membrane filtration technology.			YES
Filtergram	NIL	The examination and photomicrograph of particles found in the oil after membrane filtration.			YES
RULER Analysis	ASTM D6810 & D6971	The accurate determination of the amount of active anti-oxidant (AO) additives in the in-service lubricant as compared to the new oil. Anti-oxidants are included as sacrificial additives in formulations as they are the first additive to deplete. By having more than 30% of active AO in the in-service lubricant, protection is supplied to the base oil against oxidation which can result in varnish formation and subsequent sludging. RULER is an excellent tool in situations where large reservoirs of oil are required to operate for extended periods. RULER is an acroynm for Remaining Useful Life Evaluation Routine.

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