1. WHEN OPERATING UNDER OVERLOAD, THE ROUGHNESS OF THE DIESEL ENGINE INCREASES, THE EXHAUST PIPE EMITS THICK SMOKE, AND A LARGE AMOUNT OF CARBON DEPOSITS ARE PRODUCED. AT THE SAME TIME, THE ENGINE TEMPERATURE RISES, THE LUBRICATION CONDITIONS DETERIORATE, AND THE AGING OF THE ENGINE OIL AND WEAR OF PARTS ARE EXACERBATED.2. WHEN WORKING UNDER OVERLOAD, ADJUSTMENTS DO NOT WORK, THE ENGINE SPEED DROPS SHARPLY, FUEL CONSUMPTION INCREASES, AND POWER DECREASES.3. THE ENGINE SPEED IS UNSTABLE, AND EVEN STALLING AND PARKING MAY OCCUR. THE DRIVER HAS TO SHIFT GEARS FREQUENTLY, WHICH INCREASES THE NUMBER OF SHIFTS AND REDUCES THE WEAR AND TEAR OF PARTS, REDUCES THEIR SERVICE LIFE, AND INCREASES THE DRIVER'S WORK INTENSITY, MAKING THEM PRONE TO FATIGUE. PLEASE NOTE: WHEN THE ENGINE IS OVERLOADED, THE TRACTOR MAY NOT NECESSARILY BE OVERLOADED.4. WHEN THE DIESEL ENGINE IS OVERLOADED FOR A LONG TIME DUE TO TRACTION RESISTANCE OR TRAILER OVERLOAD, THE TRACTOR IS ALSO IN AN OVERLOADED STATE, WHICH NOT ONLY SIGNIFICANTLY REDUCES THE SERVICE LIFE OF THE TIRES, BUT ALSO EASILY CAUSES DAMAGE TO VARIOUS PARTS OF THE CHASSIS.