The steps for installing the SANY reach stacker belt are as follows: the replacement steps are as follows:
1. First, remove the fan guard;
2. The second step is disassembly and assembly To facilitate, disassemble the fan impeller;
3. Loosen the belt tensioning device bolts at the generator and loosen the generator anchor bolts;
4. Move the generator to loosen the belt , and finally take off the old belt and put on the new belt. After completion, install and adjust the belt tension according to the above-mentioned reverse disassembly and assembly method (press the belt with your thumb with a force of about 39N, the belt should be recessed by 10mm). When the fan belt (or generator belt) is severely worn and cannot be adjusted by the tensioner, the belt needs to be replaced. When replacing, it is recommended to do it when the diesel engine is cold to avoid unstable operation and burns.
What are the main reasons for sudden engine overheating?
Car generatorDisassembly and assembly need to remove the generator belt first, and then remove the generator fixing screws to complete the removal of the generator< /strong>. Below we have compiled relevant content to share with you. If you are interested, don’t miss it and take a look! The specific steps are as follows:
1. Remove the generator drive belt.
2. Loosen the generator fixing screws.
3. There is another one below.
4. Remove the generator while shaking.
5. Use fixing screws to fix the new generator.
6. After fixing, install the transmission belt and you are done.
Notes
Alternators are widely used in automobiles. You should pay attention to the following points when using them:
1. Clean the appearance of the generator frequently to remove dirt and debris. Dust, keep clean and well ventilated.
2. Frequently check the tightening condition of the fasteners related to the generator and tighten the screws in time.
3. The tension of the transmission belt must be appropriate. If it is too loose, it will easily slip and cause insufficient power generation; if it is too tight, it will easily damage the belt and generator bearings.
4. When installing the battery, be sure not to install it incorrectly. Usually, install the positive wire first and not the ground wire, otherwise the diode will easily burn out.
5. When using an integrated circuit regulator, the ignition switch should be turned off immediately when the engine is not running.
6. It is never allowed to use the "scratching" method to test whether to generate electricity.
7. When the generator fails to generate electricity, it must be eliminated in time, otherwise it will cause a more serious failure.
Reference for the above content: Baidu Encyclopedia - Car Generator
The engine is overheated. Generally speaking, the cooling water temperature in the body is too high. There are two common causes of engine overheating, namely, decline in heat dissipation capacity and excessive thermal load.
The reasons for the decline in heat dissipation capacity are:
(1) Insufficient cooling water. Cooling water is the carrier of heat in the cooling circulation system., that is to say, the heat that needs to be taken away from the engine body is taken away and dissipated by the carrier of water. If the coolant in the cooling system is reduced due to leakage or evaporation, the heat naturally taken away from the body will be reduced, causing excessive heat accumulation in the engine, which is the engine overheating. The main reasons for the reduction of cooling water are the following two points:
① Water leakage in the cooling system is mostly caused by damage to the water seal of the water pump, rupture of the pipe or loose joint connection, water leakage due to damage to the radiator, and damage to the drain switch. Or it is not closed tightly, the heater equipment is leaking, etc., which will cause the cooling water in the cooling system to decrease, thus causing the engine to overheat.
② The water in the evaporative cooling system evaporates due to the influence of temperature, which will also reduce the cooling water in the system. If the recharge is not timely, the result will be the same as above.
(2) Poor heat dissipation
①The impact of the radiator: After the radiator is used for a long time, the scale inside the radiator will also thicken accordingly. Because scale has poor heat transfer capabilities, it will cause poor heat dissipation.
The radiator vent is blocked. Due to the action of the fan when the engine is running, dust will flow through the radiator with the air. When dust adheres to the flat tubes and fins of the radiator, not only the air circulation cross-section of the radiator is reduced, but also the heat conduction capacity is too poor due to dust and dirt, resulting in poor heat dissipation.
②The cooling intensity of the fan belt slippage in the water cooling system depends on the fan speed. If the fan drive belt slips because it is too loose, it will cause the power transmission efficiency to decrease. This will not only reduce the fan speed, but also reduce the cooling efficiency. The strength decreases, and at the same time, the water pump speed also decreases, and the displacement decreases, which makes the cooling water flow slowly and cannot take away the heat quickly, that is, poor heat dissipation.
③Influence of the cooling intensity adjustment device The shutters and thermostat are cooling intensity adjustment devices. If the cooling intensity adjustment device fails or is operated improperly, it will cause the engine temperature to be too high.
The louvers are located in front of the radiator and are used to adjust the ventilation flow of the radiator. When the opening is large, the ventilation volume is large, and conversely when the opening is small, the ventilation volume is small. When the shutters are not opened, the cooling air flow cross-section is smaller, which results in an increase in engine temperature.
The thermostat is damaged. The thermostat is located at the water outlet of the engine. Its function is to adjust the cooling intensity. That is, when the engine temperature is low, it cuts off the large circulating water path and connects the small circulating water path to reduce the heat dissipation and make the engine temperature rise quickly; the engine temperature rises to When the temperature is specified, the thermostat connects the large circulating water circuit and closes the small circulating water circuit. If the thermostat is damaged and cannot connect the large circulation water circuit, resulting in poor cooling water circulation, the heat absorbed by the cooling water cannot be carried to the radiator for dissipation and the engine overheats.
④ Cooling water freezes. When working in winter, the cooling water temperature in the radiator water chamber is very low and easy to freeze. When frozen, the cooling water does not circulate, causing the cooling water temperature to be too high.
The reasons for excessive thermal load are:
(1) The diesel engine works roughly. The diesel engine works roughly because of the long lag time after ignition and excessive fuel injection., The combustion preparation is sufficient. Once a fire occurs, the flame will spread quickly everywhere, the burning speed is fast, and the pressure rise rate increases, causing rough work. Due to the rough operation of the diesel engine, the heat transfer from the gas to the cylinder head and cylinder wall increases, which increases the temperature of the cylinder and other parts and cooling water, causing the engine to overheat.
(2) The injection time is too late and the injection advance angle is too small. Most of the combustion process is moved to the expansion work, the volume above the piston increases, and the contact area between the flame and the cylinder wall increases. The heat absorbed also increases, thereby reducing the utilization rate of thermal efficiency, increasing the exhaust temperature, and increasing the heat transferred to the cooling water.
(3) Carbon deposits: When there is a lot of carbon deposits in the combustion chamber of the engine, heat will be accumulated, which is also the reason why the cooling water temperature is too high.
(4) The engine assembly is too tight. Because the engine assembly is too tight, the friction resistance is very large when the engine is working, and the heat generated increases. When the heat is transferred to the cooling system, the heat load of the cooling system increases, so the engine The temperature is too high.
(5) Improper operation: Construction machinery often works under heavy loads, and the ambient temperature is also high. This not only increases the heat load on the cooling system, but also reduces the heat exchange rate of the cooling system due to the high ambient temperature. Deterioration (poor cooling effect), causing the engine temperature to be too high.
2． Solution:
(1) If the cooling water temperature is normal when the diesel engine is under normal load, but when the heavy load operation time is too long, the cooling water temperature is obviously too high, which indicates that the engine overheating is caused by the engine working for a long time. Caused by heavy workload, you should take proper rest.
(2) If the engine often operates under rough working conditions, it is also the cause of engine overheating. The reason for the rough working of the engine should be identified and eliminated in a targeted manner.
(3) If the engine is weak when working, the sound is muffled, the cooling water temperature is high, and the exhaust pipe temperature is abnormally high, it means that the engine overheating is mostly caused by the injection advance angle being too small, and it should be treated as diesel The fuel injection time is adjusted according to the method mentioned by the supply system.
(4) Observe the ventilation condition of the radiator. If the shutter in front of the radiator is not opened, or there is too much scale on the radiator, it indicates that the cause is mostly due to engine overheating and should be dealt with.
(5) Observe whether the coolant in the cooling system is sufficient. If there is water leakage in the appearance, it indicates that the engine overheating is caused by water leakage, and the water leakage should be eliminated; if there is no water leakage, open the radiator water cap and observe The adequacy of the cooling water. If the cooling water is seriously insufficient, it is usually caused by the engine overheating because the cooling water has not been replenished for a long time, and it should be replenished.
(6) Check the tightness of the fan belt. When the engine is stopped, move the fan blade by hand. If the fan can be moved to slide, it means that the fan belt is too loose, which is the cause of poor heat dissipation and should be corrected. Adjustment. By adjusting the belt tensioning device, such as a generator or a special tensioning pulley, the belt can be increased in pre-tightening force. The inspection standard is: Use your thumb to press 29-4 between the generator and the fan wheel.It is appropriate to press the belt 10 to 20 times with a force of 9N (3-5kg).
(7) Check the radiator scale. Observe the scale in the radiator from the water inlet of the radiator. If there is indeed scale, it means that scale is the cause of poor heat dissipation and engine overheating, and should be removed. Elimination method: put a certain amount of descaling agent into the cooling water, let the engine run for 24 hours, then drain the water and replace it. If the cooling effect is improved, the same method should be repeated several times (but it is easy to corrode rubber parts).
(8) Check the thermostat. Pay attention to the temperature rise after the engine is initially started. If the water temperature rises quickly, it means that the thermostat is damaged and the engine is overheating, and the thermostat should be replaced.
(9) If the above inspections are normal, it means that the engine overheating is caused by excessive carbon deposits in the combustion chamber. If it is caused, it should be disassembled and identified, and the carbon deposits should be removed.
(10) If the water temperature suddenly rises when the engine is running in winter, it is mostly caused by the freezing of the cooling water in the radiator water chamber, which should be heated to solve the problem.