Diesel overheating will increase the consumption of water, the water temperature exceeds 95°C, and even radiator water “opens the pot†and escapes into steam. The diesel engine power drops. If it is not repaired in time, it will cause “bulging cylinder†and “burning tileâ€. "Holding axis" and other serious problems. 1. Water is not added in time. The cooling system leaks seriously causing insufficient cooling water. The reasons for the leakage are as follows: 1.1 The upper and lower radiators or radiator cores of the radiator are broken. Repair or bond cracks or replace or weld a few leaky heat pipes. 1.2 The connection hose is damaged or the fastening clamp is loose. Replace damaged hoses or tighten clamps. 1.3 The cylinder liner is damaged by the water blocking ring, and the water leaks to the oil pan to increase the oil level and is emulsified. Replace damaged water stop ring. 1.4 The cylinder head is damaged, the cylinder liner and the cylinder head are covered with sand or cracks, and the water enters the cylinder. The cylinder is not normally burnt and is accompanied by exhaust water spray. Replacement of damaged parts, such as the cylinder head and the cylinder body with sand holes or cracks, can also be compensated by Loctite adhesive. When scratching, scrape off the paint at the crack of the part, then use glue, and if necessary, add filler to make up. 2. The fan drive belt is too loose or the blade angle is not correct or deformed, or the fan assembly is reversed to the pump pulley. Correctly adjust the tension of the fan belt, press down or pull up the middle of the belt with a force of 49-69N. When the stress point is 15-20 mm away from the original position, the tension is appropriate; correct the blade angle or replace the fan assembly; The total composition of the fan of the diesel engine is both suction and exhaust, and the blade angles of the two are different, and there is only one installation position and direction. If the wind direction cannot be changed after reverse mounting, but the air volume is greatly reduced, it should be properly assembled. 3, the cooling system within the water channel or the radiator scale blockage, poor heat dissipation. Clean the scale in the watercourse and plug the radiator. When cleaning, firstly put a net of cooling water, inject a 25% hydrochloric acid solution into the water jacket and park it for 10 minutes to dissolve and release the scale. When the cleaning fluid is released, rinse it with clean water. When preparing the cleaning solution, be sure to pour the hydrochloric acid into a glass vessel or plastic container and stir it evenly. 4. The fuel supply advance angle is too large or too small. Each diesel engine has a best injection advance angle and corresponding fuel advance angle at the calibrated speed and rated power. Any early or late fuel supply will cause the diesel engine to overheat, reduce the charge (intake) density and reduce the power. This is because, when the fuel supply advance angle is too large, the fuel is injected into the combustion chamber almost during the compression stroke. As the piston goes upward, when the temperature in the cylinder reaches the auto-ignition temperature of the fuel, the fuel burns almost simultaneously and some of the fuel is burned. The steam is surrounded by the exhaust gas to obtain no oxygen, and is subjected to oxidation and secondary combustion during the exhaust process, and the diesel engine is easily overheated after combustion. When the fuel supply advance angle is too small, although the temperature and pressure in the cylinder are high, the time for the fuel combustion work is shortened. Before the fuel is ignited, the piston has started to descend, and the temperature and pressure in the cylinder are lowered, which increases the number of fires. Delay, burn-in occurs in the expansion stroke, the pressure increase rate and the maximum pressure decrease, the exhaust temperature increases, the cooling water heat loss increases, the power drop occurs, and the diesel engine overheats. According to the specification of the diesel fuel advance angle, it can be adjusted. 5, injector atomization is not good, poor combustion causes diesel engine overheating. Check and adjust injector pressure, spray quality and angle according to specifications. 6, radiator core or shield mesh is blocked by debris. Remove debris and grass clippings. 7. The pump pulley or impeller and the water pump shaft fail to cooperate to make the impeller disengage. Repair or replace failed parts. 8, there is a windshield of the diesel engine, windshields block the radiator. Collapse windshield. 9, thermostat failure. The important function of the thermostat is to automatically adjust the temperature of the cooling water so that the diesel engine is always kept within the optimal operating temperature range. If LR 6105T8 diesel engine uses wax type thermostat, it is installed in the thermostat housing at the outlet of the right front end of the cylinder head. Thermostat main valve opening temperature is 762 °C, full open temperature is 86 °C, valve lift is 8 mm. When the diesel engine cold start, the water temperature does not reach 74 °C, the water out of the outlet pipe; or when the diesel engine is hot, the water temperature exceeds 78 °C and the outlet pipe does not flow out, indicating that the thermostat has failed and should be removed an examination. The method is: The thermostat can be slowly heated in water. When the water temperature reaches 762°C, the main valve of the thermostat should start to open. When the water temperature reaches 86°C, the main valve should be fully opened. The valve lift is 8 at this time. Mm. If the inspection does not meet the requirements, it shall be replaced promptly.