MIL-PRF-46170E
3.1.2 Tolerances. The hydraulic fluid supplied under contract shall have the same
formulation as when qualified. The finished oil properties shall fall within permissible
tolerances assigned by the qualifying activity to the product receiving qualification.
3.2 Materials. Unless otherwise specified herein, the chemical formula of the hydraulic
fluid is the prerogative of the contractor as long as all articles submitted to the Government fully
meet the operating, interface, support and ownership, and environmental requirements specified
(see 4.5).
3.2.1 Recycled, recovered, or environmentally preferable materials. Recycled,
recovered, or environmentally preferable materials should be used to the maximum extent
possible providing that the material meets or exceeds the operational and maintenance
requirements and promotes economically advantageous life cycle costs.
3.2.2 Hydraulic fluid. The hydraulic fluid shall consist of a synthetic hydrocarbon base
stock (alpha-olefin polymer). Additives shall not include resins, soaps, gums, fatty oils, oxidized
hydrocarbons, chlorine or silica.
3.3 Additive materials. There shall be no restriction on the types of materials used as
additives in the fluid except for those listed and those imposed by technical requirements of this
specification. Pour point depressants and viscosity index improvers shall NOT be used.
3.3.1 Oxidation inhibitors. Oxidation inhibitors (phenolic- type) shall be added to the
base oil in quantities not to exceed a concentration of 2.0 percent by weight.
3.3.2 Corrosion inhibitors. Corrosion inhibiting materials shall be added to the base oil
in quantities necessary to comply with the requirements of this specification.
3.3.3 Anti-Wear Agent. Anti-wear agents, such as tricresyl phosphate (TCP) conforming
to TT-T-656, shall be blended in sufficient quantity, not to exceed 3.0 weight percent, to permit
the finished oil to meet the Steel-on-Steel requirement specified in Table I. If TCP is used, the
finished fluid shall not contain more than 0.03 weight percent of the ortho isomer.
3.3.4 Blending fluid. Blending Fluids, such as diesters, may enhance the finished fluid s
rubber swell characteristic and viscosity at -40C. When blending fluids are used, their quantity
shall not be greater than 30 percent by weight.
3.4 Hydraulic fluid properties. The properties of the hydraulic fluid shall be as specified in
Table I, Table II, and 3.4.1 through 3.5.
5
For Parts Inquires call Parts Hangar, Inc (727) 493-0744
© Copyright 2015 Integrated Publishing, Inc.
A Service Disabled Veteran Owned Small Business