Mobil Aero HF Series – Aviation Hydraulic Fluids
Mobil Aero HF Series, Mobil Aero HFA and HF are formulated for aircraft systems where the use of hydrocarbon-based hydraulic fluids is required. They are low viscosity products, high VI (viscosity index) fluid with excellent low temperature properties, good anti-wear performance, and good chemical stability. Mobil Aero HFA and HF are composed of mineral base oil stock and contain shear-stable VI improvers.
Features :
– High Viscosity Index (VI)
– Excellent low-temperature properties
– Good chemical and oxidation stability
MOBIL AERO HF, HYDRAULIC FLUID, PAIL 5 GAL
Applications:
Mobil Aero HF is a premium quality fluid that is approved against the most current version of U.S. Military specification MIL-PRF-5606. It has physical properties very similar to Mobil Aero HFA, and also meets the “super-clean” requirements of modern aircraft hydraulic systems.
It is intended primarily for military aircraft, but it is also used as a hydraulic fluid for small private and commercial aircraft, and as a strut fluid in the landing gear of large commercial aircraft. It is a NATO Code Number H-515 fluid.
Mobil Aero HF: Aviation Hydraulic Oil
Mobil Aero HF is formulated for aircraft systems requiring the use of hydrocarbon-based hydraulic fluids. It is a low-viscosity, high-VI (viscosity index) fluid with excellent low-temperature properties, good antiwear performance, and good chemical stability. Mobil Aero HFA and HF are based on mineral base oils and contain shear-stable VI improvers.
Features and Benefits of Mobil Aero HF
Mobil Aero HF Series aviation hydraulic fluids are designed to meet the demanding requirements of commercial and military aviation applications. These high-quality formulations have a long history of excellent performance and provide long, trouble-free service under a wide range of operating conditions.
Product features and potential benefits include:
| Characteristics | Advantages and potential benefits |
| High viscosity index (VI) | Allows the equipment to operate over a wide temperature range |
| Excellent low temperature properties | Provides high performance operation in low ambient conditions |
| Good chemical and oxidation stability | Resists the formation of acidic constituents, varnishes and deposits |
| Meets “super clean” requirements of U.S. specifications MIL-PRF-5606 (Aero HF) | Ensures reliable performance of pumps, servo valves and other hydraulic system components |
Mobil Aero HF Applications
Mobil Aero HFA is a premium fluid that meets the quality requirements of U.S. military specification MIL-H-5606A (now obsolete). It has a very high VI and is suitable for use at temperatures down to -54ºC (-65ºF). Although this premium fluid is no longer used by the U.S. military, it is still used in some older, smaller private and commercial aircraft.
It is also used in industrial and commercial equipment that requires good fluidity at very low temperatures, where Mobil Aero HFA provides long, trouble-free service under a wide range of operating conditions.
Mobil Aero HF is a premium fluid approved to the latest version of the U.S. military specification MIL-PRF-5606. It has very similar physical properties to Mobil Aero HFA and also meets the “super cleanliness” requirements of modern aircraft hydraulic systems.
It is intended primarily for military aircraft, but is also used as a hydraulic fluid for small private and commercial aircraft and as a landing gear strut fluid for large commercial aircraft. It is a NATO fluid code H-515.
Specifications and approvals
| This product is recommended for use in applications requiring: | HF |
| Mil-H-5606A |
| This product meets or exceeds the requirements of: | HF |
| MIL-PRF-5606J | X |
| NATO H-515 | X |
Properties and specifications
| Property | HF |
| API Gravity, ° API, ASTM D287 | 29 |
| Barium, mg/kg, ASTM D5185 | <1 (10 max) |
| Base oil specific gravity 15.6 C / 15.6 C, ASTM D287 | 0.872 |
| Bulk Modulus, Secant Isothermal at 40 C / 4000 psi, psi, ASTM D6793 | 200,000 min |
| Colour, Visual | Red |
| Copper Strip Corrosion, 72 Hours at 135°C, ASTM D130 | 1B (2E max) |
| Corrosion and Oxidation Stability, 168 hours at 135°C, Classification, ASTM D4636 | RIDE |
| Density at 60 F, lb/gal, CALCULATED | 7.26 |
| Evaporation Leakage, 6H at 71°C, mass%, ASTM D972 | 12 (20 maximum) |
| Flash Point, Cleveland Open Cup, °C, ASTM D92 | 107 |
| Flash Point, Pensky-Martens Closed Cup, °C, ASTM D93 | 96 (82 min) |
| Four-ball wear test, scar diameter, mm, ASTM D4172 | 0.6 (1.0 maximum) |
| Kinematic Viscosity at -40 C, mm2/s, ASTM D445 | 450 (600 maximum) |
| Kinematic Viscosity at -54 C, mm2/s, ASTM D445 | 2000 (2500 max) |
| Kinematic Viscosity at 100 C, mm2/s, ASTM D445 | 5.2 (4.9 min) |
| Kinematic Viscosity at 40 C, mm2/s, ASTM D445 | 14.0 (13.2 min) |
| Low temperature stability, 72 hours at –54°C, FTM 791.3458 | RIDE |
| Particulate Contamination, mg/100ml, ASTM D4898 | 0.2 (0.3 maximum) |
| Pour Point, °C, ASTM D97 | -62 (-60 maximum) |
| Shear Stability, % KV Loss, ASTM D2603 | 15 max |
| Viscosity Index, ASTM D2270 | 370 |
| Water content, mg/kg, ASTM D6304 | 50 (100 maximum) |
Health and safety
Health and safety recommendations for this product are available on the Material Safety Data Sheet (MSDS) @ http://www.msds.exxonmobil.com/psims/psims.aspx
All trademarks used herein are trademarks or registered trademarks of Exxon Mobil Corporation or one of its affiliates, unless otherwise indicated.
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