Aviation Oils

Castrol Aero 40
Castrol Lubricant Oils Company Logo

VISCOSITY - 326

Landing Gear Shock Strut Fluid

DESCRIPTION

Castrol Aero 40 is a high quality, mineral hydraulic fluid meeting the MIL-H-5606 and Boeing BMS 3-32 Type II specifications. Designed for use in aircraft landing gear shock struts.

Speciality hydraulic fluid for aircraft landing gear shock struts. Castrol Aero 40 is a high quality, mineral based hydraulic fluid meeting MIL-H-5606 requirements.

It contains a highly shear stable viscosity index improver, an anti-oxidant, anti-wear agents and an approved extreme pressure additive which reduce martensitic streaking of landing gear outer cylinders and galling of shock strut upper bearings.

Aero 40 is available in either dyed red (Douglas Aircraft) or undyed, straw coloured (Boeing Spec BMS 3-32, Type II).A

Aero 40 is designed for use in aircraft landing gear shock struts. It is compatible with approved oils meeting MIL-PRF-6083 specification and other MIL-H- 5606 qualified hydraulic fluids. It is compatible with other petroleum-based and synthetic hydrocarbon lubricants but contamination should be avoided in order to maintain the performance of this product. Additionally, 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.Aero 40 (Red) is formulated to meet Douglas Aircraft Specification DPS 3.334.

APPLICATIONS

Castrol Aero 40 is designed for use in landing gear shock struts. It is compatible with approved MIL-PRF-6083 and other MIL-H5606 qualified hydraulic fluids. It is not completely compatible with synthetic gas turbine lubricants nor with phosphateester 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.

ADVANTAGES
TYPICAL CHARACTERISTICS
Viscosity 14 mm/s² at 40°C
Viscosity index 326
Oil type Mineral
Product type Lubricating Oils
Applicable to these sectors Aerospace, Automotive Manufacture, Mining
APPROVAL & PERFORMANCE CLAIMS
ADDITIONAL INFORMATION

Aero 40 -Red is formulated in accordance with Douglas Aircraft Specification DPS 3.334, referenced as douglas stock number DPM 6176. Additionally, 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.

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PACK SIZES AVAILABLE
20L208L

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