Spare parts ► HMGC/HMGF series Hitachi Hydraulic parts

Main advantages of Hitachi HMGC/HMGF series hydraulic pumps

Hitachi HMGC/HMGF series hydraulic pumps are among the highly efficient and reliable devices for various hydraulic systems. Here are the main advantages of these pumps:

• High performance: HMGC/HMGF series pumps provide high performance and power, allowing them to be used effectively in various industrial and construction applications.
• Energy efficiency: The advanced design of these pumps allows for reduced energy costs while ensuring high performance, making them economical to operate.
• High reliability: HMGC/HMGF series hydraulic pumps are durable and reliable thanks to the use of high-quality materials and technologies that ensure stable operation even in the most difficult conditions.
• Compact and easy to install: Thanks to their compact design, these pumps are easy to install, allowing them to be used in confined spaces or in specific designs without compromising performance.
• Reduced noise and vibration: Thanks to their optimized design, the HMGC/HMGF series pumps operate with minimal noise and vibration, which increases operating comfort and reduces system wear.
• Versatility: These pumps are suitable for a wide range of applications, including construction machinery, agricultural equipment and heavy industry, allowing them to be adapted to different operating conditions.
• Long service life: The hydraulic pumps of this series have a long service life thanks to high-quality components and stable operation under difficult operating conditions.
• Ease of maintenance: Ease of maintenance and quick component replacement reduces maintenance time and reduces support costs.
• Precision and stability of operation: thanks to precision regulation technology, these pumps maintain stable operation under different loads and in conditions of variable power demand.

Hitachi HMGC/HMGF series hydraulic pumps consist of major components, each of which plays an important role in its operation. The main components of this pump include:

• Cylinder block (Cylinder block Rotor)

consists of several cylinders in which plungers are located, which, moving inside the cylinders, create a variable volume, due to which hydraulic fluid is sucked in and pumped out.

• Drive Shaft motor

a key component of a hydraulic motor that transmits the rotational motion and torque generated by the energy of the hydraulic fluid to the working mechanism (such as gears, chains, or wheels). It is made of high-strength materials capable of withstanding significant loads, and provides the connection of the hydraulic motor to other elements of the system, converting hydraulic energy into mechanical energy.

• Driven Shaft

This is a part of the hydraulic system that transmits torque from the drive (for example, from an engine or motor) to the working elements of the hydraulic pump. It provides movement and rotation of the rotor or other moving part of the pump, which allows you to pump fluid and create the necessary pressure in the hydraulic system. The driven shaft must be b and wear-resistant, as it operates under high loads, often in aggressive environments, so it is made of special materials that withstand mechanical and chemical influences.

• Ball guide

a mechanical element that has a spherical inner or outer surface and is used to compensate for angular displacements or irregularities between the parts being connected. It provides smooth movement, reduces friction and wear in assemblies where there is a need for small angular or axial deviation, for example, in car suspensions, hinges, hydraulic and other moving mechanisms. Spherical bushings are made of materials with high wear resistance, such as steel or polymers, and contribute to the long-term operation of mechanisms even under intense loads.

• Snap Ring

a fastening element used to fix parts in mechanisms, preventing them from accidentally moving or being removed from their seat. It is usually made of elastic metal or other material, which allows it to fit tightly into a slot or groove, providing reliable fixation. A retaining ring is widely used in bearings, gears, shafts and other mechanisms where it is necessary to hold parts in place during operation or transportation. Its advantage is ease of installation and removal, as well as the ability to withstand significant loads.

• Snap Ring

a fastening element used to fix parts in mechanisms, preventing them from accidentally moving or being removed from their seat. It is usually made of elastic metal or other material, which allows it to fit tightly into a slot or groove, providing reliable fixation. A retaining ring is widely used in bearings, gears, shafts and other mechanisms where it is necessary to hold parts in place during operation or transportation. Its advantage is ease of installation and removal, as well as the ability to withstand significant loads.

• Lock nut

a type of nut used to secure a main nut or other fastener in a fixed position, preventing it from loosening under the influence of vibration or load. It has a special design, often with built-in protrusions or threads, which allows it to securely clamp the main nut and hold it in a given position. Locknuts are commonly used in applications where it is important to ensure the stability of the connection, for example in the automotive, aviation or heavy machinery industries.

• Swash plate ball

a component used in mechanisms where it is necessary to provide rotation or pivoting of one part relative to another. It is usually installed as a support or bearing in a turntable that is responsible for the displacement of rotating parts (for example, in cranes, excavators or other machinery with moving platforms). The ball helps reduce friction and wear, providing smooth movement and stability when the turntable rotates, and also helps distribute the load evenly between the elements.

• Needle Bearing

a type of bearing that uses needle rollers instead of the usual balls or cylindrical elements to reduce friction between moving parts. The needles have a small diameter and a long length, which allows the bearing to be smaller while maintaining high load capacity and efficiency. Needle bearings are used in confined spaces and under high loads, such as in automotive transmissions, engines, agricultural machinery, and other machinery where compactness and reduced friction are important.

• Roller Bearing

a type of bearing that uses cylindrical or tapered rollers instead of balls to provide rotation. Roller bearings can withstand higher loads than ball bearings and provide a more efficient distribution of force across the contact surface, which reduces wear and increases the service life of mechanisms. They are widely used in automotive, industrial and agricultural machinery, as well as in various machines where there are high radial or axial loads, for example, in transmissions, bearings of heavy machine tools and engine shafts.

• Center Pin

an element used to connect moving parts in mechanisms, ensuring their stability and the ability to rotate or pivot. It is usually located in the central part of the structure and acts as an axis of rotation for important components such as suspensions, hinges or other connections in machinery. Central pins are widely used in agricultural, construction machinery, automotive systems and other mechanisms where reliable load transfer and accuracy of movement between parts are required.

• Tilting Plate Assembly

a part of a mechanism that provides power transmission and facilitates the smooth rotation of a turntable in hydraulic systems or other machine components. It serves as a support or distribution surface between the turntable and other elements, reducing friction and evenly distributing the load. The plate is made of b and wear-resistant materials, such as steel or alloys, and is used in equipment with moving platforms, for example, in excavators, cranes or hydraulic pumps. Its design ensures the stability and durability of the turntable mechanism.

• Tilting Plate Assembly

a component of a mechanism that provides force transmission and promotes smooth rotation of a turntable in hydraulic systems or other machine components. It serves as a support or distribution surface between the turntable and other elements, reducing friction and evenly distributing loads. The plate is made of b and wear-resistant materials, such as steel or alloys, and is used in equipment with moving platforms, for example, in excavators, cranes or hydraulic pumps. Its design ensures the stability and durability of the turntable mechanism.

• Retainer Plate

an element of hydraulic pumps and motors that ensures tight contact of pistons with a swash plate or other working element, creating sealed chambers for working with hydraulic fluid. It reduces leaks, provides uniform pressure, and promotes stable operation of the mechanism, being made of wear-resistant materials to withstand high loads and friction.

• Shoe plate

a part of hydraulic pumps or motors that serves to support and fix other components, such as a cylinder block or piston group, ensuring their stability and correct location during operation. It transfers the load from moving parts to the mechanism body, provides tightness and may have channels for supplying and removing the working fluid. It is made of wear-resistant materials that can withstand high pressures and mechanical loads.

• Piston shoe

is a mechanical element commonly used in hydraulic systems to transmit force or motion. The plunger is a cylindrical piston that performs translational motion, and the thrust bearing serves as a support part that reduces friction and ensures uniform load distribution between the plunger and the working surface. Such designs are widely used in pumps and other mechanisms where high precision and durability are required.

• Swash plate (Cam rocker)

a mechanical element used to provide rotational motion in various machines and mechanisms. It has a design that allows it to rotate around an axis, providing flexibility and mobility to the system. A turntable is often used in lifting mechanisms, cranes, hydraulic installations and machines to perform operations with precise direction or angle changes. Its function is to maintain stability during the rotation of heavy loads or machine parts, reducing friction and ensuring reliable movement.

• Tilting plate piston

A spare part of a hydraulic mechanism that transfers hydraulic energy from the working fluid to the turntable, ensuring its movement and operation. It is usually installed in high-pressure systems and works in conjunction with the turntable to create a rotary or oscillating motion. The piston is made of high-quality materials that are resistant to wear and the effects of the working environment, such as alloy steel. This component ensures the accuracy, efficiency and durability of the operation of the hydraulic system, for example, in pumps or drives of construction or agricultural machinery.

• Cylinder block spring (Spring of Rotor)

a mechanical element used to provide force, return or hold the components of a block in a certain position. It retains and restores its shape under the influence of external forces, ensuring the stability and functionality of the block. The block spring is made of elastic and wear-resistant materials, such as steel or special alloys, which allows it to withstand repeated loads without losing its properties. It is widely used in hydraulic system mechanisms, engines and other technical devices to compensate for forces, reduce vibrations and ensure the correct operation of components.

• Spring of Ball guide

element that provides the necessary pressure or force to fix and stabilize a spherical bushing in a mechanism. It helps compensate for backlash, absorb vibrations, and maintain constant contact between the bushing and the connected parts. Such a spring is usually made of b and elastic materials, such as steel, and is used in systems where smooth rotation or compensation of angular displacements is required, for example, in hinges, suspensions, or hydraulic units. Its function ensures the reliability and durability of the mechanism even under intense loads.

• Disk Spring

a flat or conical element, usually made of spring steel, used to store, absorb, and transmit mechanical energy. It is capable of compressing under an external load and returning to its original shape when the load is removed, providing shock absorption, vibration damping, or compensation for thermal expansion in joints. Spring discs are often used in friction clutches, spring washers, mechanical shock absorbers, and other systems that require increased elasticity and reliability

• Repair kit

a set of spare parts and components intended for the repair or maintenance of technical devices, machines or equipment. It contains all the necessary elements that may wear out or fail during operation, such as seals, gaskets, oil seals, gears, bolts, nuts, filters and other parts. A repair kit allows you to restore the functionality of the equipment without the need for its complete replacement, which helps to reduce maintenance costs and extend the service life of the equipment.

• Repair kit for hydraulic travel motor (Seal kit)

a set of spare parts intended for the repair and restoration of the hydraulic motor, which is used to drive moving mechanisms (for example, undercarriage parts of construction or agricultural machinery). The repair kit usually includes sealing rings, seals, gaskets, bearings, valves, retaining rings and other components that wear out during operation. Using a repair kit ensures the restoration of tightness, reduced fluid loss and efficient power transmission, which allows you to extend the service life of the hydraulic motor without its complete replacement.

• Seal kit for the travel motor

a set of components intended for the repair and maintenance of the engine that provides movement of equipment, for example, excavators, bulldozers or other vehicles. The repair kit usually includes seals, gaskets, piston rings, liners, oil seals, valves and other elements that wear out during engine operation. Using a repair kit allows you to restore the tightness and functionality of the engine, ensuring its efficient operation and extending its service life without the need for major repairs or replacement of the entire unit.

• Seal kit

a set of spare parts intended for the repair and maintenance of the engine, which is responsible for the movement of equipment, such as excavators, loaders or bulldozers. The repair kit usually includes sealing elements (seals, gaskets, rings), bearings, valves, piston groups and other parts that wear out during operation. Using such a kit allows you to restore the tightness, performance and functionality of the travel motor, which ensures stable operation of the equipment and prevents the need for a complete replacement of the unit.

• Separation Plate

a component of a mechanism used to separate, distribute, or transfer loads between different parts of a system. It is usually made of b materials such as steel or alloys, and may have holes or a special shape for ease of installation and operation. A separator disc is often used in hydraulic pumps, transmissions, bearings, and other assemblies to reduce friction, protect components from wear, and provide uniform pressure or load distribution in the mechanism.

• Valve plate Motor

is a spare part used to ensure uniform load distribution or adjustment of clearances in engine mechanisms. It is usually a thin metal disc that is installed between various elements, such as shafts, bearings or gears. Its main function is to ensure precise fit of parts, avoid excessive friction, wear or deformation, and also contribute to stable engine operation. Distribution washers are often used in valve mechanisms, clutches and other components of an internal combustion engine.

• Hydraulic pump shaft seal (Shaft Seal)

an element that seals and provides tightness between the rotating and stationary parts of a hydraulic pump, preventing leakage of the working fluid and protecting the mechanism from dust, dirt and moisture. It is installed on the shaft of the hydraulic pump and operates under high pressure and friction conditions. The gland is made of elastic, wear-resistant materials such as rubber, silicone or fluoroplastic, and may have reinforcement to increase strength. This element is critically important for the stable operation of the hydraulic system, ensuring a long service life and reliability of the pump.

• Ball guide

is a spherically shaped component used to connect or support moving parts of a mechanism, ensuring their smooth movement. It is usually made of metal or other durable material and serves to compensate for irregularities or gaps between parts, reducing friction and wear. Spherical bushings are often used in systems where angular movement or rotation is required, such as in car suspensions, as well as in hydraulic and mechanical systems where stability and ease of installation are important.

• Swash plate Ball

a mechanical assembly that provides a movable connection between a rotating cradle (plate) and other components of the mechanism. Due to its spherical design, the hinge allows you to compensate for angular displacements, ensuring smooth and precise movement of the cradle in different directions. It is usually made of b and wear-resistant materials, such as steel or alloys, and may include bushings, bearings or other elements to reduce friction. The spherical cradle hinge is widely used in hydraulic systems, construction machinery and other mechanisms where flexibility and reliability of the connection of moving parts are required.

• Friction Plate

is an element used in torque transmission mechanisms, providing adhesion between parts due to the force of friction. It is usually made of materials with a high coefficient of friction, such as metal with a special coating, composites or heat-resistant alloys. Friction discs are used in clutches, transmissions, brake systems and other units where regulation or transmission of motion between components is required. They ensure the efficient operation of the mechanism, absorbing shock loads and contributing to a smooth transition between operating modes.

• Washer

is a flat, usually circular element with a hole in the middle, used to evenly distribute the load from a nut or bolt head to the surface of a part, as well as to prevent damage to fasteners and connecting parts. It can also perform a sealing or locking function, depending on the type. Washers are made of metal, plastic, rubber or other materials, depending on the connection requirements. They are widely used in construction, mechanical engineering, electrical engineering and other industries.

• Tilting Plate Assembly

A component used in hydraulic systems, particularly in turntable assemblies, to ensure smooth rotation, reduce friction, and distribute the load evenly between moving parts. It is installed between the turntable and other elements of the mechanism, acting as a support or separator. The washer is made of b and wear-resistant materials, such as alloy steel or special alloys, to withstand high loads and long-term contact with the working surfaces. This element contributes to the reliable and efficient operation of the hydraulic mechanism, for example, in pumps or motor drives.

• Brake disc (Separation (mating) plate)

a component of a braking system used to create friction when braking a vehicle or other machinery. It is a round metal part that is acted upon by brake pads, creating friction that leads to a reduction in speed or a complete stop of the moving part. Brake discs are made of materials that can withstand high temperatures and loads, such as cast iron or composite materials. They are widely used in cars, motorcycles, rail transport, as well as in various machines and equipment where effective braking is required.

• Ball Bearing

a type of bearing that uses balls as sliding elements, located between two rings (inner and outer). The balls provide minimal friction and wear during rotation, thanks to which the bearing is able to transfer loads effectively, reducing resistance to movement. Ball bearings are able to withstand radial loads and small axial loads, and are used in a wide range of applications - from household appliances to automotive and industrial mechanisms. They are popular due to their compactness, simple design and reliability.

• Stove pipe

is a pipe or fitting used to transport a coolant (usually coolant) to and from a heater or heater core in a car, boiler, or other heating system. In cars, heater hoses connect the heater core to the engine cooling system, allowing the air in the passenger compartment to be heated by heat exchange between the hot fluid and the air. Hoses are made of materials that can withstand high temperatures and pressures, such as rubber, silicone, or metal, and are often shaped to ensure a leak-proof seal and ease of installation.

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