465K

Hydraulic pressure supply from the 465K pump

The main function of the 465K is to deliver hydraulic fluid at the required pressure and flow rate. The pump can feed hydraulic accumulators, brake circuits, emergency lines or other consumers depending on the aircraft system. It is not a simple transfer pump. The 465K is a pressure-generating assembly, so its condition directly affects whether the connected system can develop enough force for operation. If the pump loses performance, the system may still switch on electrically, but pressure build-up may be slow, unstable or insufficient under load.

465K with the D-4500K electric motor

The 465K is driven by a D-4500K DC motor with compound excitation. The motor operates from the aircraft 27 V DC network and provides the mechanical drive needed for the plunger pump section. Since the motor power is significant for a low-voltage aircraft system, the pump must be connected through proper contactors and protection devices. It should not be switched directly through low-current controls. During troubleshooting, the motor, contactor, wiring, protection circuit and hydraulic section must all be checked, because a fault in any of these areas can stop the pump from working correctly.

Aircraft application of the 465K pump

The 465K is used on several Soviet and Russian aircraft types, including Tu-134, An-12, An-24, An-26, Mi-6 and Mi-10, depending on aircraft configuration. In these systems, pumps of the 465 family may support emergency hydraulic pressure, brake operation, ground testing or service functions. Exact installation can differ by aircraft type and modification. The pump may be located in a hydraulic bay, service compartment or equipment area, connected to the relevant hydraulic reservoir, pressure line, accumulator and control units.

465K in ground and marine hydraulic installations

Besides aircraft use, the 465K can be used in specialized ground, field and marine hydraulic installations. Its 27 V DC power supply makes it practical where an industrial electrical network is not available, but a mobile DC source, aircraft battery system or generator can be used. This is why pumps of the 465 family are sometimes found in field hydraulic systems, including pipe-laying equipment and mobile hydraulic units. However, non-aircraft use should not be confused with aviation interchangeability. For aircraft installation, the pump still has to match the approved documentation.

Difference between 465K and other 465 versions

The 465 family includes several related models: 465A, 465D, 465K, 465MTV and 465P. They may look similar, but their pressure ratings, electric motors, flow rates, mounting requirements and system roles can differ. The 465K version uses the D-4500K motor and is rated for its own pressure and delivery range. The 465D is a higher-pressure version, while 465MTV uses another motor and has different output characteristics. The 465P version is supplied without an electric motor and is intended for an external mechanical drive. For replacement, the exact designation matters.

Inspection and supply of 465K

Before installation, the 465K should be checked as a complete electrohydraulic unit. The inspection should include the pump body, hydraulic ports, mounting surfaces, electric motor, terminals or connector, direction of rotation, leakage, pressure build-up and performance under load. Since the pump is installed vertically with the hydraulic block downward, mounting position also has to be respected. For supply, the condition should be stated clearly: new, from storage, repaired, overhauled or bench-tested. For aircraft use, passport, acceptance records and test documentation are important, not optional paperwork.