Komatsu WA470 hydraulic pump repair
The hydraulic pump of the Komatsu 470 wheel loader is an axial piston type with a swash plate, capable of operating at working pressures up to 320 bar. This pump supplies hydraulic power for the lift cylinders, steering system, and auxiliary hydraulic functions. The original brands commonly used are Komatsu or Kawasaki Japan, both known for precise engineering and long service life under demanding mining and construction conditions.
The head and flow rate of the Komatsu 470 hydraulic pump range between 280 and 320 liters per minute at 1800 rpm, depending on the model. The internal flow passages and control system are designed to optimize efficiency and reduce pressure loss. This high hydraulic capacity ensures smooth steering response and fast, stable movement of the lift arms, which is critical for loading and material handling operations.
The repair process of the 470 hydraulic pump begins with complete disassembly and cleaning of all components using a moisture-free industrial solvent. Critical parts such as pistons, cylinder block, bearings, and swash plate are then inspected with micrometer precision. If wear exceeds 0.02 millimeters, replacement or re-machining is performed. Finally, the pump is reassembled and tested at 300 bar pressure and nominal flow to verify pro
