Troubleshooting Common Excavator Issues (And How to Fix Them)
Excavators are essential for heavy-duty tasks across construction, agriculture, and civil works. But like any powerful machinery, they can develop issues over time. Knowing how to identify and fix these common problems can save you downtime, repair costs, and frustration — especially in remote Australian conditions.
Whether you’re operating a Yuchai mini excavator or another brand, this guide will walk you through the most common excavator issues and how to address them effectively.
🛠 1. Excavator Won’t Start
Possible Causes:
- Dead battery
- Faulty starter motor
- Clogged fuel system
- Ignition switch failure
Fix:
- Check and replace the battery or terminals if corroded.
- Inspect fuel filters for blockages and drain any water from the fuel/water separator.
- Test the starter motor and ignition switch with a multimeter.
- If unresolved, consult your Yuchai dealer or technician.
⚠ 2. Weak Hydraulic Power
Symptoms:
- Sluggish boom or arm movement
- Difficulty lifting or digging
- Jerky or inconsistent control
Possible Causes:
- Low hydraulic fluid levels
- Dirty or worn hydraulic filters
- Pump or valve failure
Fix:
- Check fluid levels and top up with manufacturer-recommended oil.
- Replace clogged filters.
- Inspect for hydraulic hose leaks or wear.
- If issue persists, the hydraulic pump may need servicing or replacement.
🔧 3. Track Won’t Move or Is Slipping
Possible Causes:
- Worn or damaged track components
- Loose or broken drive motor
- Blocked undercarriage
Fix:
- Inspect the tracks for excessive wear, debris, or damage.
- Clean out the undercarriage.
- Tighten or replace worn sprockets or rollers.
- If fluid is present around the drive motor, check for leaks and seals.
🧯 4. Overheating Engine
Possible Causes:
- Low coolant
- Blocked radiator or oil cooler
- Faulty thermostat or fan
Fix:
- Check coolant levels and inspect for leaks.
- Clean the radiator fins and air intake area.
- Ensure the fan belt is in good condition and the thermostat is working.
- Avoid overloading the engine in hot Australian summers — allow cooling breaks.
🔍 5. Warning Lights on the Display
Symptoms:
- Error codes or lights on the dashboard
- Unusual sounds or smells
Possible Causes:
- Sensor faults
- Electrical issues
- Overload or fluid problems
Fix:
- Refer to your Yuchai excavator’s operator manual for specific error codes.
- Scan the machine using a diagnostic tool if available.
- Resolve issues such as low fluids, faulty wiring, or sensor disconnection.
✅ General Excavator Maintenance Tips
- Inspect before use: Check oil, coolant, and hydraulic levels daily.
- Keep it clean: Dirt buildup can cause major wear — clean the undercarriage regularly.
- Stick to service intervals: Follow the Yuchai maintenance schedule to prevent issues.
- Use genuine parts: For long-term reliability, always use authorised parts and fluids.
👷♂️ Why Choose Yuchai Excavators?
Yuchai’s excavators are built for reliability, performance, and ease of maintenance, making them ideal for Australian operators who need tough machines with minimal downtime. Our service team is available across the country to support you with diagnostics, spare parts, and mobile repairs.
📞 Need Expert Excavator Support?
At Yuchai Australia, we offer full technical support, service solutions, and parts for all Yuchai equipment. Whether you’re dealing with a stubborn hydraulic issue or engine warning light, we’ll help you get back on track — fast.