AERO 400 pages

AERO 40

Issue Number 2
21/06/2004

Landing Gear Shock Strut Fluid
DESCRIPTION
Castrol Aero 40 is a high quality, mineral based MIL-H-5606 hydraulic fluid containing a
highly shear stable viscosity index improver, an anti-oxidant, anti-wear agents, and an
approved EP additive which reduce martensitic streaking of landing gear outer
cylinders and galling of shock strut upper bearings. Castrol Aero 40 is undyed, straw
coloured to meet Boeing Specification BMS 3-32, Type II
APPLICATION
Castrol Aero 40 is designed for use in landing gear shock struts. Castrol Aero 40 is
compatible with approved MIL-PRF-6083 and other MIL-PRF-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
synthesised hydrocarbon lubricants but contamination should be avoided in order to
maintain the unique properties of Castrol Aero 40. It 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
Castrol Aero 40, it is advisable to confirm acceptability of use with either the material
manufacturer or Castrol.
FEATURES

BENEFITS

S

S

Approved EP additive

Reduces martensitic streaking of landing
gear outer cylinders and galling of shock
strut upper bearings.

All reasonable care has been taken to ensure that the information contained in this publication is accurate as at the date of printing. It should be noted
however that the information above may be affected by changes occurring subsequent to the date of printing in the blend formulation or methods of application
of any of the products referred to or in the requirements of any specification approval relating to any such products.

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