Castrol Aero 40 Landing Gear Shock Strut Fluid, Straw Colored, 55 gal, BMS 3-32, Type II

Castrol Aero™ 40 is a high quality, mineral based MIL-H-5606 hydraulic fluid containing a highly shear stable viscosity index improver, an antioxidant, anti-wear agents, and an approved EP additive which reduce martensitic streaking of landing gear outer cylinders and galling of shock strut upper bearings. Part number 27027BEDR is undyed, straw colored (Boeing Spec BMS 3-32, Type II).

APPLICATIONS
Aero 40 is designed for use in landing gear shock struts. It is compatible with approved MIL-PRF-6083 and other MIL-H 5606 qualified hydraulic fluids. It is not completely compatible with synthetic gas turbine lubricants nor with phosphate ester hydraulic fluids. It is compatible with other petroleum-based and synthesized hydrocarbon lubricants, but contamination should be avoided in order to maintain the unique properties of Aero 40. This product is compatible with seals, hoses and paints normally used in shock struts and dispensing equipment connected with this application. While certain grades of the above materials are fully compatible with Aero 40, it is advisable to confirm acceptability of use with either the material manufacturer or Castrol.

TECHNICAL INFORMATION
Aero 40 is formulated as an alternative to Boeing Service Letters 707-SL-12-2; 727-SL-12- 2; 737-SL-12-2; and 757-SL-27-15-B, which instruct the addition of an EP additive to either the standard or corrosion inhibited mineral based hydraulic fluid for use in their landing gear shock struts.

TYPICAL CHARACTERISTICS
• API Gravity @ 16°C / 60°F (ASTM D287): 29.2 °API
• Density of finished oil @ 16°C / 60°F (In-house test): 7.332 lb/gallon
• Kinematic Viscosity @ 100°C / 212°F (ISO 3104 / ASTM D445): 4.71 mm²/s
• Kinematic Viscosity @ 40°C / 104°F (ISO 3104 / ASTM D445): 13 mm²/s
• Kinematic Viscosity @ -40°C / -40°F (ISO 3104 / ASTM D445): 510 mm²/s
• Kinematic Viscosity @ -54°C / -65°F (ISO 3104 / ASTM D445): 2670 mm²/s
• Viscosity Index (ISO 2909 / ASTM D2270): 344
• Flash Point - open cup method (ISO 2592 / ASTM D92): 108°C / 225°F
• Fire Point (ISO 2592 / ASTM D92): 116°C / 240°F
• Pour Point (ISO 3016 / ASTM D97): -57°C / -70°F
• Copper Corrosion (72 hrs @ 121°C / 250°F) (ISO 2160 / ASTM D130): Rating 1a
• Four Ball Wear test - Wear Scar Diameter (40 kgf / 75°C / 1200 rpm / 1 hr) (ASTM D4172): 0.43 mm
• Falex Pin & Vee Block test - Extreme Pressure properties (ASTM D3233-03, method A): Pass