ROYCO 770 is a super clean synthetic hydraulic fluid developed to meet the severe duty demands of today's military and industrial equipment.
Rust inhibitors are utilized to provide protection to ferrous components and modern additive technology is employed for oxidative stability, corrosion inhibition, and anti-wear protection.
ROYCO 770 is designated as a P-15 protectant according to the Mil-STD-2073-1D standard.
Applications:
ROYCO 770 is intended for use in severe duty applications requiring extremes in environment and/or extended time periods between operation such as tank and howitzer recoil mechanisms and hydraulic systems, snow removal, earth moving and heavy duty construction equipment, and industrial robotic hydraulic systems.
ROYCO 770 is especially recommended in applications where rust protection together with a high flash point can afford an extra margin of safety and fire protection.
Advantages:
- Excellent rust and corrosion inhibition
- Outstanding anti-wear properties to extend life
Compatibility:
ROYCO 770 should not be used in aviation hydraulic systems without prior evaluation and should not be used in systems in contact with natural rubbers.
Intermixing ROYCO 770 with petroleum base stocks will reduce fire resistant properties
Approvals:
ROYCO 770 meets all requirements and is qualified against MIL-PRF-46170D Type 1.
ROYCO 770 Type 2 is not a standard offering and requires a special order.
A Type 2 fluid is no longer required under MIL-PRF-46170D.
| PROPERTIES | ROYCO 770 |
| Kinematic Viscosity @ 100°C, cSt | 3.71 |
| Kinematic Viscosity@ 40°C, cSt | 15.7 |
| Kinematic Viscosity@ -40°C, cSt | 2435 |
| Kinematic Viscosity@ -54°C, cSt | 14,765 |
| Flash Point, °C | 228 |
| Fire Point, °C | 250 |
| Autoignition, °C | 387 |
| Pour Point, °C | -60 |
| Total Acid No., mg KOH/g | 0.10 |
| Specific Gravity, (15.6°C) | 0.859 |
| Gravimetric Filtration, mg | 0.2 |
| Trace Sediment, ml | 0.001 |
| Water Content, % wt | 0.02 |
| Water Sensitivity, % trans. | 98 |
| Evaporation, % loss 300°F/22 hrs. | 2.5 |
| Synthetic Rubber Swell, “L”, 158°F/168 hrs. | 20 |
| 4-Ball Wear, mm2 scar | |
| 10 Kg/1200 RPM/1 hr/75°C | 0.25 |
| 40 Kg/1200 RPM/1 hr/75°C | 0.45 |
| Solid Particle Contamination, auto counter, particles/litre | |
| 5-25 mu | 2200 |
| 26-50 mu | 80 |
| 51-100 mu | 10 |
| 100+ mu | 0 |
| PROPERTIES | ROYCO 770 |
| Foam Characteristics, ml @ 5 min blow/ ml @ 10 min | |
| Seq I | 15/0 |
| Seq II | 10/0 |
| Seq III | 15/0 |
