Product Description
*** USE BY DATE: 12/15/25 ***
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 the material
manufacturer. 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.
(for Douglas DPM 6176 'RED" see Castrol Aero 40 'Red' product: Aero 40 -Red is formulated in accordance with Douglas Aircraft Specification DPS 3.334, referenced as Douglas stock number DPM 6176)
