Engine overheating is the most common & annoying problem for excavators, especially in hot weather or heavy-duty construction sites!
If your Kobelco excavator or any heavy machinery hits high water temp alarms, DO NOT keep working — it will burn the cylinder head, damage the engine, and cost you thousands in repair fees! 🛠️
Share a fast & practical troubleshooting checklist for all excavator operators & mechanics, save your time and money👇
✅ Step 1 Check Coolant Level First
Low or leaked coolant is the #1 cause of overheating.
Check the main & auxiliary water tank liquid level. Refill standard coolant if insufficient, drain excess if overfilled. Never mix different coolant types!
✅ Step 2 Clean Clogged Radiator
Working sites are full of dust, dirt, and debris, which easily block the radiator surface.
Clean external dirt with low-pressure air/water gun regularly. Flush internal scale thoroughly if the water circulation is poor.
✅ Step 3 Inspect Fan & Fan Belt
Loose, worn fan belts or slow fan rotation will lead to bad heat dissipation.
Check belt tightness and abrasion; replace broken parts in time to ensure normal fan operation.
✅ Step 4 Check Thermostat & Water Pump
Stuck thermostat (only small water cycle works) or faulty water pump causes poor water circulation.
Inspect pump for water leakage and shaft looseness, replace damaged accessories immediately.
✅ Step 5 Rule Out False Alarm Sometimes the dashboard
shows high temp but the actual temperature is normal — this is a sensor failure!
Verify with an infrared thermometer and replace the faulty temperature sensor.
A💡 Critical Reminder:
Never pour cold water on a superheated engine suddenly! It will crack the cylinder block and cause permanent damage. Let the engine idle slowly to cool down first.
❗️Master these steps, you can solve 99% of excavator high water temperature faults by yourself!
Follow us for more excavator maintenance tips, fault solutions, and heavy machinery repair knowledge！Let’s keep your machine in perfect working condition all year round🔥
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💡Please watch the video below for the specific steps.👇
Have questions about this procedure or need to source a genuine Kobelco parts? Browse our online store for certified parts or contact our technical team directly. We’re here to help keep your equipment running strong.
Share your maintenance tips in the comments below! What’s the most common issue you find during a hydraulic service?
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