High-Temperature Precautions SAFETY High-Temperature Areas When you stop the machine at the end of a job, the engine coolant, oil, all engine parts, exhaust stack, and the hydraulic system are still hot and under pressure. If you attempt to drain engine coolant, hydraulic fluid, or engine oil under these conditions, you expose yourself to various dangers, including the risk of serious burns. Perform maintenance procedures described in this manual only when the machine has had time to cool down.
High-Temperature Coolant To prevent burns from boiling water or steam spurting out when checking or draining the coolant, wait for the coolant to cool down to a temperature where the radiator cap can be touched by hand. When the radiator cap is no longer hot, loosen the cap slowly to release the pressure inside the radiator and remove the cap. High-Temperature Oil To prevent burns from hot oil spurting out or from touching high- temperature parts when checking or draining the oil, wait for the oil to cool down to a temperature where the cap or plug can be touched by hand.
When the components are no longer hot, loosen the cap or plug slowly to release the internal pressure and remove the cap or plug. High Voltage When the engine is running or immediately after it has stopped, high voltage is generated at the injector terminal and inside the engine controller. There is danger of electrocution . Never touch the injector terminal or inside the engine controller. If it is necessary to touch the injector terminal or the inside of the engine controller, please contact your Komatsu distributor. WA430-6 1-49