Royco 756 is a red-dyed, mineral oil based hydraulic fluid developed for the severe duty demands of aerospace and industrial service.
Features and Benefits:• Wide operating temperature range
• Low temperature fluidity
• Exceptional anti-wear performance
• “Super Clean” Fluid to improve equipment life
• Excellent oxidation and corrosion inhibition
Approvals and Specifications:
Royco 756 meets all requirements and is qualified under MIL-SPEC: MIL-PRF-5606H(3) that supersedes Mil-H-5606G, Mil-O-5606, AN-O-336, AN-VV-O-336, and AAF-3580.
Royco 756A meets the technical requirements of Mil-H-5606A.
PROPERTIES | TEST METHOD | ROYCO® 756 |
Kinematic Viscosity, cSt | | |
@ 100°C | ASTM D445 | 4.90 |
@ 40°C | ASTM D445 | 13.2 |
@ -40°C | ASTM D445 | 600 |
@ -54°C | ASTM D445 | 2500 |
Low Temperature Stability, -54°C, 72 hours | FTM 3458 | 29.8 |
Pour Point, °C | ASTM D97 | -62 |
Flash Point, COC, °F | ASTM D92 | 231 |
Acid Number, mq KOH/g | ASTM D664 | 0.4 |
Density, pounds per gallon | ASTM D287 | 7.261 |
Copper Corrosion, 135°C, 72 hours, ASTM color | ASTM D130 | 1B |
Water Content, ppm | ASTM D6304 | 44.9 |
4-Ball Wear, 75°C, 40 kg, 1200 rpm, 1 hour, mm | ASTM D4172 | .58 |
Evaporation, 71°C, 6 hours, %wt loss | ASTM D972A | 10.4 |
Gravimetric Filtration mg/100 ml, 0.45mu @ 25°C | Para 4.4.3 | |
Barium Content, ppm | ASTM D5185 | 1 |
Foam Resistance, 75°F | ASTM D892 | |
foam volume, ml | | 32 |
foam stability | | None |
API Gravity | ASTM D4052 | 30.8 |
Micron Size, count / mL | | |
5-15 mµ | FTM 3012 | 963 |
16-25 mµ | FTM 3012 | 120 |
26-50 mµ | FTM 3012 | 36 |
51-100 mµ | FTM 3012 | 5 |
100+ mµ | FTM 3012 | 1 |
Water, Coulometric KF Titration, ppm | ASTM D6304 | 45 |