Wheel Loader WA420-3 Gear Pump 705-52-30770 Hydraulic Pump For Komatsu The Komatsu WA420-3 is a type of wheeled loader, and the gear pump mentioned is likely a hydraulic component used in its hydraulic system. A gear pump is a positive displacement pump that uses the meshing of gears to move fluid. Here's some information about the gear pump in this context:   1. **Function**: In construction equipment like the Komatsu WA420-3, the gear pump is crucial for the hydraulic system. It provides the necessary hydraulic power for operations such as lifting, tilting, and moving the bucket.   2. **Design**: Gear pumps consist of two gears: one driven gear (connected to the drive shaft) and an idler gear. The gears rotate within a closely fitted housing. As the gears turn, they create a vacuum at the pump inlet, which draws fluid into the pump. The fluid is then carried between the teeth of the gears to the outlet, where it is forced out under pressure.   3. **Maintenance**: Regular maintenance is important to ensure the gear pump operates efficiently. This includes checking for proper lubrication, ensuring there is no contamination in the hydraulic fluid, and inspecting for wear or damage to the gears or housing.   4. **Replacement**: If the gear pump fails, it may need to be replaced. Replacement parts should match the specifications of the original part to ensure compatibility and performance with the rest of the hydraulic system.   5. **Troubleshooting**: Common issues with gear pumps can include excessive noise, insufficient flow or pressure, or overheating. These problems could be due to worn gears, incorrect hydraulic fluid, or other mechanical issues.