Komatsu WA800 hydraulic pump repair
The hydraulic pump of the Komatsu WA800 wheel loader is typically an axial piston pump with a swash plate design, capable of operating at pressures up to 350 bar. This pump supplies the required oil flow for the hydraulic system, including the boom and bucket cylinders. The original brand used in this machine is usually Komatsu or Kobe, both recognized for their high durability and performance under demanding mining conditions.
The flow capacity of the WA800 hydraulic pump varies between 750 and 900 liters per minute at the rated speed of 1800 rpm, depending on the specific model. Such a high flow rate ensures smooth and responsive operation of hydraulic components such as lift cylinders and the steering system. The optimized internal oil passages are engineered to minimize pressure losses, thereby improving overall hydraulic efficiency.
The overhaul process of the WA800 hydraulic pump includes inspection of the cylinder block, replacement of pistons, evaluation of the swash plate, and control of internal bearings. Wear tolerances in these components are generally kept below 0.02 millimeters to maintain optimal efficiency. After reassembly, a performance test at 300 bar pressure and the nominal flow rate is required to verify leakage-free operation and stable performance.
