Hyundai

hyundai excavator 210 swing pump M2X146

The swing pump of the Hyundai 210 excavator, Kawasaki M2X146 model, is an axial piston motor with a swash plate design, engineered for the rotational movement of the excavator’s swing arm. This pump has a displacement of 145.7 cm³ per revolution, a nominal operating pressure of 30 MPa, and a maximum pressure of 37 MPa. Its maximum flow rate reaches 210 liters per minute, and rotational speed is up to 1650 rpm. These specifications enable the pump to deliver a torque of 12,800 Nm while ensuring precise control of the swing movement. The swash plate design and precise pressure and flow control maintain hydraulic system efficiency even under heavy operating conditions.

During repair, the pump is first removed from the hydraulic system and thoroughly cleaned to eliminate any suspended particles or contaminants. The cylinder block, drive shaft, swash plate, pressure plates, and springs are inspected using precision tools such as micrometers and gauges. O-rings, seals, and other consumable components are replaced, and friction surfaces are carefully refurbished. Pump pressure and flow are tested after repair to ensure performance meets factory standards, with no leakage or power loss.

After replacing and repairing damaged components, the pump is reassembled with precise torque

hyundai 912 pump A8VO55

The main hydraulic pump A8VO55, manufactured by Rexroth, is an axial piston pump with a dual design, used in open-circuit hydrostatic systems. It is applied in Hyundai 912 excavators and Liebherr machinery with the following specifications:

* **Displacement:** 2 × 54.8 cm³ per revolution
* **Maximum operating pressure:** 350 bar
* **Peak pressure:** 400 bar
* **Maximum flow:** 2 × 137 liters per minute
* **Input power at maximum speed:** 160 kW
* **Maximum input torque:** 611 Nm
* **Approximate weight:** 82 kg

These specifications demonstrate the pump’s high capacity to provide the necessary pressure and flow for optimal hydraulic system performance in heavy machinery.

During repair of the A8VO55 pump, it is first removed from the hydraulic system, and all external connections and components are inspected. Precision tools such as micrometers and gauges are used to assess the dimensions and condition of internal parts including pistons, swash plate, cylinder block, and drive shaft. Any worn or damaged components are replaced. After component replacement, the pump is carefully reassembled and subjected to performance testing to ensure pressure, flow, and torque meet factory specifications.

Finally, once proper performance is confirmed, the pump is reinstalled

K3V112 hyundai 210 excavator

Repairing the main pump of a Hyundai 210 excavator, Kawasaki K3V112 model, requires precise inspection of hydraulic components and internal parts. First, the pump must be removed from the system and an initial check for leaks and mechanical damage performed. Then, the shaft, control rings, and vanes are measured with high-precision tools such as micrometers and gauges. In case of corrosion or cracks, components should be replaced according to JIS or ISO standards. Additionally, the pump’s operating pressure must be checked and adjusted to 250 bar with a flow rate of 160 liters per minute to ensure optimal hydraulic system performance.

Replacing high-pressure O-rings and seals must be done carefully to prevent hydraulic leaks. After assembly, the pump is tested on a hydraulic test bench under 250 bar pressure and 50°C oil temperature. Vibration, noise, and oil flow are checked, and any deviations from factory specifications are corrected. This repair process not only extends the pump’s service life but also ensures hydraulic system efficiency reaches up to 95 percent of factory standards.

hyundai 760 friction graphite

hyundai 760 friction graphite that made by tehrangearbox