Products and services

Aircraft Landing Gear

The first landing gears were manufactured in the late 1930s to be installed on airplanes of the time. Today, JSC «Hydromash» landing gears and hydraulic units are used on the best Russian airplanes and helicopters.

Aviation products of JSC «Hydromash» have proved to be top-quality owing to their high-precision and high-tech design intended for long-term use. 

Hydromash products are highly reputed all over the world. Each and every one of them is a result of the work of qualified personnel motivated to continue the traditions of manufacturing top-quality landing gear and hydraulic units.  All Hydromash products are easy to maintain, reliable and durable.

Aircraft actuators and units

JSC «Hydromash» develops, manufactures, tests and maintains a wide range of hydraulic and pneumatic units intended to be installed on airplanes and helicopters.

Hydraulic / pneumatic actuators for the following systems with operating pressures up to 35 MPa (350 kgf/cm2):

  • airplane and helicopter landing gear retraction and extraction
  • airplane alighting mechanization
  • airplane flight control
  • airplane compartment flap door opening and closing systems
  • retraction and extraction of other airplane elements

Actuator design options:

  • Without locks
  • Without locks, with an arresting device at the end of the rod stroke (with anti-overload valves if necessary)
  • With an in-built mechanical lock in the retracted and/or extracted rod position
  • With an in-built mechanical lock and a drive to install a mechanism for signalizing the locked position
  • With an in-built mechanical lock and an installed mechanism for signalizing the locked position
  • With an in-built mechanical lock and an arresting device at the end of the rod stroke
  • With a hydraulic lock mounted on hydraulic actuator
  • With an emergency valve mounted on hydraulic actuator
  • With a hydraulic lock and an emergency valve mounted on hydraulic actuator
  • Actuator fixtures to mount actuators on airplanes can either be equipped with ball bearings, which can be self-lubricated, or they can be made in the form of cardan joints, which can have operating fluid pipelines installed

Hydraulic units:

  • Distributing and damping units
Mechanically driven slide-valve hydraulic units with feedback couplings for operating fluid distribution in operating cavities of steering gear power actuators in control mode and for creating hydraulic resistance when operating fluid flows from one actuator cavity to another in damping mode.
  • Hydraulic shimmy dampers. Intended to prevent NLG shimmy vibrations
  • Nonflow dampers
  • Lifting dampers
  • Stabilizing dampers
  • Special-purpose dampers 
Intended to prevent airplane flight control surface vibrations
  • Hydraulic compensators
  • Hydraulic units for airplane and helicopter hydraulic systems
  • Hydraulic shock dampers
  • Dosers

Hydraulic cylinders for construction and road equipment

Apart from aviation products JSC «Hydromash» develops and manufactures hydraulic actuators used as power elements in hydraulic systems of various construction machines (excavators, loaders, tractors, etc.), agricultural equipment, mixed navigation vessels, mining equipment, special-purpose equipment, and also pivot pin-, pin-, block-, flange-type parts.

In hydraulic actuator design we use various damping options, which eliminate equipment elements overload, high quality durable sealings produced by the leading German and Russian manufactures on the basis of polyester thermoplastic and composite materials. The quality of hydraulic actuators meets the highest requirements owing to the use of new technologies and material grades 41Cr4, 42CrMo4, 34CrNiMo6, S355J, computer-aided design, CNC machines, testing equipment and a highly efficient inspection system. JSC «Hydromash» carries out serial production of and prefer to work with:

  • sleeves dia. from 65 mm to 200 mm;
  • rods dia. from 50 mm to 160 mm, 2000 mm long.

Manufacture of hinge pin-type parts is carried out as a closed-loop production cycle that includes induction hardening, chromium-plating or phosphate treatment, welding, painting (priming).

Manufacture of block-, pin-, flange-type parts is carried out on modern high-precision equipment with the use of advanced cutting tools and machining methods.

JSC «Hydromash» carries out serial production of:

  • hydraulic and distributing blocks with dimensions from 50х50х50 mm to 200х200х350 mm;
  • pins with dia. from ø50mm to ø 120mm and length up to 500 mm;
  • flanges with dimensions from 50х50х20mm to 200х200х350mm.

We are most attentive to the market requirements and our customers' preferences.

Export production

JSC «Hydromash» is integrated in European aircraft programs and is a long-time partner of the world’s largest aircraft equipment manufacturer - Liebherr Aerospace SAS and supplies landing gear components for Airbus A320, A330/340, A350, A220, Embraer 170/190, Global Express aircraft and Leonardo helicopter.


  • development and manufacture of landing gear for all types of aircraft; 
  • aircraft equipment maintenance and overhaul, delivery of spare parts; 
  • development, manufacture and repair of hydraulic actuators; 
  • in-house production of blanks (diameters of cut blanks from 10 to 280 mm with lengths from 10 to 1400 mm)
  • in-house production of forgings (hammer forgings with weight up to 130 kg, die forgings up to 40 kg)