How to Solve High Water Temperature in Komatsu Excavators?
3 Answers
Add water if the level is low, adjust the fan belt if it's too loose, and flush with water if the radiator fins are blocked by dust or debris to improve ventilation. Adding water can help lower the temperature. If there is rust in the radiator, clean it, repair any leaks, and add specialized coolant to reduce the temperature.
I have encountered excavator overheating issues multiple times and have rich experience in handling them. Immediately stop the vehicle to let the engine cool down, otherwise it may lead to cylinder scoring or more severe damage. First, check the coolant level—if it's below the minimum line, replenish or replace it, preferably with the manufacturer-recommended type. Next, inspect the radiator, which is prone to clogging from mud or grass debris, leading to poor heat dissipation. I use a soft brush or an air hose to clean the external fins. Also, ensure the fan is rotating properly—adjust or replace the belt if it's loose. Check the water pump for leaks; contaminated areas are often visible to the naked eye. Overheating can also occur if the thermostat is stuck closed, requiring professional tools for testing. Develop a habit of regular cleaning after daily work to prevent dust buildup. If you can't resolve the issue yourself, contact a professional repair shop promptly to avoid minor issues escalating. These steps have helped me prevent major failures—the key is timely action.
Last time when operating the Komatsu excavator, the water temperature suddenly spiked. I immediately stopped to inspect. The coolant was too low, and even after refilling, it remained high. I discovered a lot of mud stuck on the fan blades causing blockage. After cleaning, it returned to normal. Another time, the belt was loose and the fan wasn’t spinning. It took some time to replace the new belt to fix it. Usually, pay attention to radiator cleanliness, especially in dusty construction sites where debris easily accumulates and blocks, affecting cooling. Also, poor-quality coolant or incorrect ratios can lead to overheating. I insist on using genuine products. Once the water temperature warning light comes on, immediately stop and shut down the engine to cool, then troubleshoot step by step, from simple to complex. This can prevent engine overheating and part failure, significantly reducing repair costs. Practical experience has taught me that prevention and maintenance are better than post-repair.
