465MTV

Hydraulic role of the 465MTV pump

The 465MTV is used where the aircraft needs an independent source of hydraulic pressure. On aircraft such as An-24, An-26, An-30 and Tu-134, pumps of this family may be used for emergency or backup hydraulic circuits. Depending on the aircraft layout, the pump can charge hydraulic accumulators, support brake operation, assist emergency landing gear or flap extension, or provide hydraulic pressure during ground servicing with engines stopped. The pump is therefore not just a service accessory; in the correct aircraft system it can support important backup functions.

465MTV with the D-1500TV electric motor

The 465MTV is equipped with a D-1500TV DC electric motor. This motor has compound excitation and self-ventilation, and is designed for operation from the aircraft DC network. Compared with heavier versions of the 465 family, the 465MTV uses a lower-power motor and is intended for systems with lower pressure and flow requirements. The motor still draws significant current at 27 V, so the pump is normally connected through proper switching and protection equipment rather than directly through small cockpit switches or low-current control contacts.

Hydraulic circuit around the 465MTV unit

In the aircraft hydraulic system, the 465MTV usually works together with unloading valves, hydraulic accumulators, shuttle valves, pressure sensors and the hydraulic reservoir. The pump draws AMG-10 fluid from the tank and delivers it into the pressure line. When system pressure reaches the set value, unloading equipment can redirect flow back to the tank or relieve the pump load. Shuttle valves may transfer selected consumers from the main hydraulic system to the emergency circuit. This surrounding equipment is what makes the pump useful as part of a controlled hydraulic system.

Electrical control of the 465MTV pump

The electrical side of the 465MTV system normally includes DC contactors, circuit breakers, thermal protection and pressure signaling devices. A cockpit switch or emergency hydraulic control does not usually feed the motor directly; it commands the contactor, and the contactor switches power to the D-1500TV motor. Pressure relays or signal units may send indications to the crew, showing that the emergency hydraulic system is operating or that pressure has been reached. When diagnosing faults, the pump, motor, contactor, protection devices and pressure sensors should be checked together.

Aircraft and ground applications of 465MTV

The 465MTV and 465MTV-2 are used on aircraft such as An-24, An-26, An-30, Tu-134, An-12, An-8, An-22 and Tu-16, as well as on heavy helicopters such as Mi-6 and Mi-10, depending on configuration. Pumps of the 465 family may also be used in ground, airfield, marine and field hydraulic installations where a compact 27 V DC hydraulic source is required. In non-aircraft use, the pump is often valued for its ability to operate from mobile DC power sources rather than industrial mains power.

Difference between 465MTV and other 465 versions

The 465 family includes several versions, including 465A, 465D, 465K, 465MTV and 465MTV-2. These units should not be treated as automatically interchangeable. The 465MTV differs by the D-1500TV motor, pressure and flow characteristics, port geometry and installation requirements. It is also intended for different system loads than higher-pressure versions such as 465D. When selecting a replacement, the exact designation and aircraft documentation are more important than the general family name. A wrong version may fit poorly, overload the circuit or fail to deliver the required hydraulic parameters.

Inspection and supply of 465MTV

Before installation, the 465MTV should be checked as both a hydraulic and electrical unit. The inspection should include housing condition, mounting position, hydraulic ports, motor condition, wiring terminals, direction of rotation, leakage, pressure build-up and flow under load. The unit is designed for vertical installation with the hydraulic block downward, so installation position should also be considered. For supply, it is useful to specify whether the pump is required new, from storage, repaired, overhauled or bench-tested with documents. Passport and acceptance documentation should be confirmed before aircraft use.