Castrol GPS

GUIDE TO HEAVY DUTY PRODUCTS AND SERVICES

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1 800 255 4417 www.castrol.com/GPS Background & Properties Industry Specifications Hydraulic Fluids July 2017 Thermal Stability: Cincinnati Milacron This test evaluates whether an oil will cause a reaction to steel and copper components. Run for 168 hours at 275°F. Test Criteria P-68, P-69 HF-O and P-70 Viscosity change, (%), max 5 Neutralization number, (%), max ±50 Sludge (mg/100 ml), max 25 100 Copper wt loss (mg), max 10 Copper rod appearance 5 Report Iron rod appearance No discoloration 1000-h Sludge (ASTM D 4310) This test measures the build-up of sludge and increase of iron and copper particulate in the oil. Test Criteria Denison HF-O HF-1 HF-2 TAN (mg KOH), max 1.0 .2 1.0 Insoluble Sludge, mg max 100 100 400 Total Cooper, mg max 200 - 200 Total Iron, mg max 50 - 100 TAN (ASTM D 974-07) Standard Test Method for Acid and Base Number by Color-Indicator Titration Importance of Wear and Load Tests Load performance and wear protection are crucial components when selecting a hydraulic fluid. Hydraulic fluids are designed to handle important shock loads and other various types of loads during operation. The ability to prevent metal to metal contact also results in lowering component wear, such as in hydraulic pumps. Proper viscosities and excellent anti-wear additives play a pivotal in protecting against wear. Types of Wear and Load Tests include: Vickers 35VQ-25 Vane Pump Test This test measures wear to the cam ring and the vane pump. It is run for three, 50-hour segments at 200°F, 3,000 psi and 2400 rpm. Test Criteria Ring 75-mg max Vane 15 mg max Total 90 mg max C 3

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