When it comes to servicing your Yanmar machine, there may be times when you need to remove the hydraulic pump. Whether you’re replacing a faulty pump or performing maintenance tasks, knowing how to remove the pump is essential. In this article, we will provide step-by-step instructions on how to remove the hydraulic pump for Yanmar ViO45-5 and ViO55-5 excavators.
Before we dive into the procedures, it’s worth mentioning that having the right tools and equipment for the job is crucial. Make sure you have a suitable lifting device, as well as a rope to secure the hydraulic pump during removal.
Related Contents:
Yanmar Diagnostic Tool Adapter Kit
Procedures:
1. Swing the upper structure of the excavator so that the drain plug (2) of the hydraulic oil reservoir (1) is positioned in the middle of the tracks. Lower the bucket to the ground and stop the engine.
2. Open the engine hood rear cover (3) and remove it.
3. Disconnect the battery negative cable (5) from the battery (4).
4. Loosen the three cap screws (6) to remove the side cover (7).
5. Remove the bottom cover (8) and place an oil container beneath the drain plug (2) of the hydraulic oil reservoir.
6. Remove the drain plug (2) to drain the hydraulic oil. It is recommended to loosen or remove the filler cap (9) to make the oil draining process easier. Approximately 10 gallons (38 liters) of hydraulic oil will be drained.
7. Disconnect the hydraulic hoses from the hydraulic pump. There are several hoses that need to be disconnected, including suction, P1, P2, P3, B1, B2, A, P (P4), C1, and C2. It is important to mark each hose to ensure they are reinstalled in their original positions. Additionally, plug each hose end and fittings on the control valve to protect them from dust.
8. Remove the couplers (6) of the wires for the cut-off valve, high-speed travel, and quick coupler.
9. Remove the installation bolts (7) from the flywheel cover to remove the hydraulic pump. Make sure to use a suitable lifting device and secure the pump with a rope before removing it.
By following these procedures, you should be able to successfully remove the hydraulic pump from your Yanmar ViO45-5 and ViO55-5 excavators. Remember to exercise caution and take all necessary safety precautions during the process.
More Yanmar machine repair case,please refer to Yanmar Trouble Repair