The YNF16802 Controller (part number 9140452) is a high-quality replacement electronic control board designed for EX550-3 excavators. This controller ensures reliable management of engine and hydraulic systems, providing precise machine operation and protecting against electronic failures. Made with durable components, it is built to withstand heavy-duty working conditions and environmental stress.

• Direct replacement for 9140452

• Compatible with EX550-3 excavators

• High-quality electronic components for long-term durability

• Controls hydraulic and engine system operations reliably

• OEM-standard dimensions for easy installation

• Resistant to vibration, dust, and moisture

• Enhances operational efficiency and machine reliability

• Suitable for EX550-3 excavators

• Used to manage hydraulic and engine electronic systems

• Ideal replacement for faulty or damaged controllers

• Part verification service available—send your old controller or machine model

• Technical guidance for installation and troubleshooting

• Full range of excavator electronic components available from YNF Machinery

• Individually packed with protective materials

• Shipped in reinforced cartons to prevent damage

• YNF-branded or neutral packaging options available

Q: Is this controller compatible with EX550-3 excavators?
A: Yes, it directly replaces part number 9140452.

Q: What systems does it control?
A: Engine and hydraulic systems.

Q: Is installation difficult?
A: No, it is designed for OEM-standard direct replacement.

Q: Is it durable under harsh conditions?
A: Yes, resistant to vibration, dust, and moisture.

Q: Will it improve machine reliability?
A: Yes, it ensures stable operation and reduces downtime.