The maintenance team first repaired the engine cooling system, replaced the damaged cooling fan and water pump, and then replaced the burned solenoid valve and pressure regulating spring of the 0R-0471 injectors. After maintenance, the temperature of the injectors returned to the normal range (≤310℃), and the injectors worked normally. The maintenance personnel reminded that the heat dissipation of Caterpillar 0R-0471 and 0R0471 injectors is very important, and the cooling system should be checked regularly to avoid overheating and component damage.