CX290 Excavator - Hydraulic & Electrical Schematics

This wiring reference for the CX290 Excavator - Hydraulic & Electrical Schematics helps you follow circuits, connectors and harnesses when you are diagnosing an electrical problem or checking a repair.

Document reference: 9-42670.

What the diagrams cover

• Hydraulic schematic
• Electrical schematic
• Hydraulic pressure settings and relief information
• Hydraulic pumps, control valves, hydraulic swivel, travel and swing components
• Boom, dipper and bucket cylinders and related valves
• Solenoid valves, pressure switches and pressure sensors
• Electrical components including controllers, sensors, fuses, relays, motors and switches
• Electrical connector, cable and color-symbol legends

Coverage

CX290 Excavator.

User help

1. Check the fit first. Compare your model and serial number with the coverage shown above. If you are unsure, message us with those details before ordering and we will help you confirm.
2. Get the file. This is a digital PDF download. Nothing is shipped, so you can start using it as soon as you have the file.
3. Read it on any device. The file opens in standard PDF readers on Windows, Mac, Android and iOS. Keep a backup copy so you always have it.
4. Find things quickly. Use the contents pages and your reader's search (Ctrl+F or Cmd+F) to jump to a component, fault code or specification. Print only the pages you need for the workshop.
5. Trace circuits methodically. Identify the circuit, connector or harness in the diagram, then check voltage, continuity and grounds at the points shown before replacing components.
6. Safety first. Work on machinery, fuel and electrical systems carries real risk. Follow the document's safety notes, use suitable tools and supports, and comply with local rules. If a job is beyond your experience, use a qualified technician.

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