Royco 782 Hydraulic Fluid, MIL-PRF-83282

Royco 782 is a red-colored, synthetic hydrocarbon-base hydraulic fluid formulated for severe-duty hydraulic systems requiring fire resistance, wide operating-temperature capability, oxidation stability, corrosion protection, and anti-wear performance. Royco 782 is qualified to MIL-PRF-83282 and is identified by NATO Code H-537 and Joint Service Designation OX-19.

Royco 782 is used in aircraft, missile, ordnance, industrial, and other hydraulic applications where the equipment manufacturer specifies a synthetic hydrocarbon hydraulic fluid meeting MIL-PRF-83282.

Royco 782 Hydraulic Fluid Specifications

Key Features of Royco 782

• Synthetic hydrocarbon formulation for hydraulic systems requiring a synthetic-base fluid.
• Fire-resistant hydraulic fluid formulated to the performance requirements of MIL-PRF-83282.
• Wide temperature capability for applications operating from -40°C to 205°C.
• Oxidation stability for demanding hydraulic service.
• Anti-wear protection for hydraulic system components.
• Corrosion and rust inhibition to help protect system components.
• Water demulsibility for hydraulic systems exposed to moisture or water contamination.
• Shear stability for severe-duty hydraulic applications.
• Red color for product identification.

Applications for Royco 782

Royco 782 is intended for hydraulic systems where the equipment or aircraft documentation specifies a MIL-PRF-83282 fluid. Documented applications include:

• Aircraft hydraulic systems
• Aircraft brake and shock absorber systems
• Automatic pilot systems
• Flap-control mechanisms
• Missile hydraulic and servo-control systems
• Ordnance hydraulic systems
• Industrial hydraulic equipment
• Heavy-duty hydraulic systems
• Industrial robotic hydraulic systems

Always verify the required fluid specification and product approval against the applicable aircraft maintenance manual, component maintenance manual, OEM documentation, or other controlling technical documentation before servicing a system.

Royco 782 Technical Characteristics

Typical physical properties are provided for technical reference. Refer to the current manufacturer Technical Data Sheet for the applicable specification requirements and current product data.

MIL-PRF-83282 Hydraulic Fluid

MIL-PRF-83282 is a U.S. military performance specification covering synthetic hydrocarbon-base hydraulic fluid for use over a temperature range of -40°C to +205°C (-40°F to +401°F). The specification identifies the fluid by NATO Code H-537. DLA currently lists MIL-PRF-83282 as an active specification.

Royco 782 is qualified to MIL-PRF-83282 and is also identified by NATO H-537 and Joint Service Designation OX-19.

Older aircraft and maintenance documentation may reference MIL-H-83282 or earlier revisions of the specification. When an aircraft maintenance document specifies a particular revision, qualification, or release, verify the exact requirement before selecting the replacement fluid.

Royco 782 vs. MIL-PRF-5606 Hydraulic Fluid

Royco 782 and MIL-PRF-5606 fluids are different hydraulic-fluid specifications and should not be treated as universally interchangeable.

The correct hydraulic fluid is determined by the aircraft, component, or equipment manufacturer's specified fluid requirement—not simply by viscosity or color.

Royco 782 Compatibility

Royco 782 is described as compatible with petroleum-based hydraulic fluids and components used in mineral-oil-type hydraulic systems. However, compatibility does not mean that Royco 782 is approved as a substitute in every application.

Before changing hydraulic-fluid types, verify the applicable aircraft or equipment documentation, seal-material requirements, system approvals, and required military or OEM specification.

Shelf Life and Storage

BAC currently lists a 5-year shelf life for Royco 782. Actual shelf life can depend on the product release, packaging, storage conditions, and whether the material is supplied under commercial, military, or NATO requirements.

Keep containers tightly closed and store the product in a dry, well-ventilated location. For specific shelf-life requirements, storage conditions, and date-of-manufacture information, refer to the applicable manufacturer documentation and product labeling.

Documentation for Royco 782

Aircraft maintenance and MRO customers may require documentation identifying the applicable product specification and release. Available product documentation may include:

• Technical Data Sheet (TDS)
• Safety Data Sheet (SDS)
• Certificate of Conformance (CofC), when applicable
• Lot and date-of-manufacture information

If a particular MIL-PRF-83282 revision or release is required, specify that requirement when ordering so the applicable documentation can be verified.

Ordering Royco 782 Hydraulic Fluid

Business Aircraft Consumables stocks Royco 782 hydraulic fluid in multiple package sizes for aircraft maintenance, MRO, industrial, and other applications requiring MIL-PRF-83282 hydraulic fluid.

For assistance confirming the required specification, package size, or documentation for your order, contact Business Aircraft Consumables at 888-239-6625, Monday through Friday, 8:00 AM–5:00 PM CST.

Frequently Asked Questions About Royco 782

Related Hydraulic Fluids

Business Aircraft Consumables also supplies other aviation hydraulic fluids, including Royco 756, Skydrol, HyJet, and Brayco hydraulic fluids. Select the hydraulic fluid based on the specification required by the applicable aircraft or component documentation.

Important: Hydraulic fluids are not universally interchangeable. Always verify the aircraft, component, or equipment manufacturer's approved hydraulic-fluid specification before selecting or replacing a fluid. Refer to the current manufacturer Technical Data Sheet and Safety Data Sheet for detailed technical, handling, and storage information.