8D2.966.015-2

8D2.966.015-2 hydraulic filter for aircraft systems

The 8D2.966.015-2 is a hydraulic filter used in aircraft and specialized equipment hydraulic systems. It is installed in the hydraulic line to remove mechanical contamination from the working fluid before it reaches sensitive components. The filter is not a pressure regulator and does not control the hydraulic circuit. Its work is more basic: it keeps the fluid clean enough for valves, pumps, actuators, fittings, and other hydraulic units to operate without unnecessary wear or blockage.

Filtration function of 8D2.966.015-2

In operation, the filter continuously passes hydraulic fluid through a regenerable filter element. The element traps particles within the specified filtration range and can be serviced according to the technical documentation. This matters in systems working with aviation hydraulic fluids such as AMG-10 and 7-50S-3, where even small contamination can affect clearances, sealing surfaces, and valve operation. A clean filter has low hydraulic resistance, but resistance increases as contamination builds up in the element.

Hydraulic circuit protection with filter 8D2.966.015-2

The 8D2.966.015-2 is normally installed as part of a wider hydraulic circuit that may include pumps, pressure lines, filters, actuators, shut-off valves, bypass paths, and service fittings. The filter assembly includes a bypass valve and a shut-off valve. The bypass valve protects the line if the filter element becomes clogged and the pressure differential rises above the set value. The shut-off valve is useful during maintenance because it helps isolate the filter location in the system layout, depending on the aircraft design.

Aircraft and equipment use of 8D2.966.015-2

The filter is used in aviation hydraulic systems operating under high pressure with approved working fluids. Open spare-part references show the filter in hydraulic system lists for Mi-series helicopters, including Mi-24 and Mi-26, and in inventory references for Mi-8 MTV/AMT. Actual applicability still has to be checked by the aircraft parts catalog, because hydraulic layouts can differ by aircraft type, modification, and overhaul history. A visually similar hydraulic filter is not always a correct replacement if the thread, flow rating, bypass setting, or filter element differs.

Identification and ordering checks for 8D2.966.015-2

Before ordering, the marking on the installed filter should be compared with the aircraft documentation or equipment manual. The product may also appear in documents as 8D2966015-2, without dots. For maintenance requests, it is useful to confirm whether the requirement is for the complete filter assembly or for the filter element 8D2.966.022-1. A request should include the part number, aircraft or equipment type, installation location, and a photo of the marking if available. The product is also known under alternative designation 8D2966015-2.

Product Type: Hydraulic filter
Function: Filtration of hydraulic fluid from mechanical contaminants
Application / Where Used: Aviation and specialized equipment hydraulic systems
System / Installation Area: Hydraulic system
Working Medium: AMG-10, 7-50S-3 and approved equivalents
Filter Element Designation: 8D2.966.022-1
Filtration Fineness (Nominal / Absolute): 16 / 25 µm
Nominal Operating Pressure: 21 MPa
Nominal Flow Rate: 10 L/min
Hydraulic Resistance of Clean Filter: Not more than 0.18 MPa
Bypass Valve Opening Pressure Differential: 0.7 MPa
Operating Temperature Range: −60 to +120 °C
Dimensions: B 66 mm, L 141.5 mm, D 50 mm
Connection Thread: M12×1
Weight: Not more than 0.75 kg
Scope of Supply: Filter assembly with regenerable filter element, bypass valve, shut-off valve
Technical Documentation: Hydraulic Filter 8D2.966.015-2 Technical Documentation

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