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Please feel free to contactus Parts Sea engineers or sales for help if you have no parts No.
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The turbocharger for excavator parts is actually an air compressor that increases air intake by compressing air. It uses the inertial momentum of the exhaust gas discharged from the engine to drive the turbine, which in turn drives the coaxial impeller. After the impeller rotates, the air sent from the air filter pipe is pressurized and pressurized into the cylinder.
When the engine speed increases, the exhaust gas discharge speed and turbine speed also increase. The impeller will compress more air into the cylinder. The increased pressure and density of the air can burn more fuel, and the corresponding engine power will also increase. Therefore, when the excavator has excessive oil consumption, blue smoke or black smoke from the exhaust, and the power drops or does not drop, and the supercharger makes abnormal noises, etc., the first thing to do is to check whether the turbocharger is damaged.
Generally, turbocharger damage is mainly caused by the vibration of the impeller shaft (the standard value of the turbocharger impeller axial clearance is 0.06-0.09MM, the limit value is 0.11MM. The standard value of the radial clearance is 0.10-0.17MM, the limit value is 0.205MM).
After the excavator is started, you cannot turn the throttle knob directly as soon as you start the car. You should run it at idle speed for 3-5 minutes. This is to increase the temperature of the oil and improve its flow performance, so that the turbocharger can be fully lubricated. Increase the engine speed for normal operation.
1. Insufficient lubricating oil or delayed oil supply
1). When the speed of the turbocharger and the load of the diesel engine increase, the amount of lubricating oil supplied to the turbocharger must also increase, because when the diesel engine operates at high load and the turbocharger speed is high, even for a short period of time Insufficient oil supply to the turbocharger bearings will also cause bearing damage.
2). When replacing the engine oil and oil filter, pre-fill the filter with clean engine oil. When starting the diesel engine for the first time after replacement, the engine should be idle for a long enough time after starting until the oil pressure is stable. before accelerating, otherwise the turbocharger bearings may be damaged due to lack of lubrication during startup.
3). When the diesel engine is working in an inclined state (partial load or full load operation), if the oil level is too low or air is sucked in, the oil pressure will decrease. Even if the time is short, the supercharger may fail due to lack of lubrication. damaged by oil.
The wear and damage of engine oil containing dirt or sediment to turbocharger bearings is much more serious than the damage to diesel engine bearings, because the speed of the turbocharger is much higher than that of the diesel engine. If this kind of damage occurs to the turbocharger, the cause of the oil contamination should be found and eliminated. Otherwise, the damage will occur even if a new supercharger is replaced, and the diesel engine may be damaged if it continues. When the dirt particles mixed in the engine oil are large enough to block the oil passage inside the turbocharger, the supercharger will be damaged due to lack of lubricating oil. When replacing the engine oil and oil filter, if possible, a sample of the engine oil in the diesel engine can be taken for analysis, which will help prevent the above-mentioned damage; the engine oil should be replaced according to the replacement period specified in the instruction manual. The filter must not be extended at will.
After the diesel engine oil is oxidized or deteriorated, sludge will be deposited. The sludge will affect the performance and life of the turbocharger. When the sludge state of the oil is serious, it will also affect the life of the diesel engine. That is, the rotational motion of the turbocharger shaft will throw the oil onto the inner wall of the casing, and the sludge will adhere and deposit on the inner wall of the casing. When excessive sludge deposits affect the oil return of the turbine end bearing journal, it will be deposited in the turbine end bearing. The sludge will be baked into hard coke due to the high temperature from the exhaust gas. When the coke peels off, the turbine end bearing and journal will wear, and the oil seal will leak before it wears. If oil leakage is found at the turbine end of the turbocharger, it is necessary to check whether the oil return pipe of the supercharger and the diesel engine ventilation pipe are blocked. The supercharger can only work after these faults are eliminated. The formation of sludge deposits is caused by the oxidation and deterioration of diesel engine oil. The fundamental reasons for the oxidation and deterioration of engine oil are the overheating of the diesel engine, excessive gas passing between the piston and the cylinder wall, diesel mixed with the engine oil, and cooling water leaking into the oil. , Improper selection of engine oil and failure to replace the engine oil within the specified period.
Please feel free to contactus Parts Sea engineers or sales for help if you have no parts No.
tse@partssea.com | sales@partssea.com
The turbocharger for excavator parts is actually an air compressor that increases air intake by compressing air. It uses the inertial momentum of the exhaust gas discharged from the engine to drive the turbine, which in turn drives the coaxial impeller. After the impeller rotates, the air sent from the air filter pipe is pressurized and pressurized into the cylinder.
When the engine speed increases, the exhaust gas discharge speed and turbine speed also increase. The impeller will compress more air into the cylinder. The increased pressure and density of the air can burn more fuel, and the corresponding engine power will also increase. Therefore, when the excavator has excessive oil consumption, blue smoke or black smoke from the exhaust, and the power drops or does not drop, and the supercharger makes abnormal noises, etc., the first thing to do is to check whether the turbocharger is damaged.
Generally, turbocharger damage is mainly caused by the vibration of the impeller shaft (the standard value of the turbocharger impeller axial clearance is 0.06-0.09MM, the limit value is 0.11MM. The standard value of the radial clearance is 0.10-0.17MM, the limit value is 0.205MM).
After the excavator is started, you cannot turn the throttle knob directly as soon as you start the car. You should run it at idle speed for 3-5 minutes. This is to increase the temperature of the oil and improve its flow performance, so that the turbocharger can be fully lubricated. Increase the engine speed for normal operation.
1. Insufficient lubricating oil or delayed oil supply
1). When the speed of the turbocharger and the load of the diesel engine increase, the amount of lubricating oil supplied to the turbocharger must also increase, because when the diesel engine operates at high load and the turbocharger speed is high, even for a short period of time Insufficient oil supply to the turbocharger bearings will also cause bearing damage.
2). When replacing the engine oil and oil filter, pre-fill the filter with clean engine oil. When starting the diesel engine for the first time after replacement, the engine should be idle for a long enough time after starting until the oil pressure is stable. before accelerating, otherwise the turbocharger bearings may be damaged due to lack of lubrication during startup.
3). When the diesel engine is working in an inclined state (partial load or full load operation), if the oil level is too low or air is sucked in, the oil pressure will decrease. Even if the time is short, the supercharger may fail due to lack of lubrication. damaged by oil.
The wear and damage of engine oil containing dirt or sediment to turbocharger bearings is much more serious than the damage to diesel engine bearings, because the speed of the turbocharger is much higher than that of the diesel engine. If this kind of damage occurs to the turbocharger, the cause of the oil contamination should be found and eliminated. Otherwise, the damage will occur even if a new supercharger is replaced, and the diesel engine may be damaged if it continues. When the dirt particles mixed in the engine oil are large enough to block the oil passage inside the turbocharger, the supercharger will be damaged due to lack of lubricating oil. When replacing the engine oil and oil filter, if possible, a sample of the engine oil in the diesel engine can be taken for analysis, which will help prevent the above-mentioned damage; the engine oil should be replaced according to the replacement period specified in the instruction manual. The filter must not be extended at will.
After the diesel engine oil is oxidized or deteriorated, sludge will be deposited. The sludge will affect the performance and life of the turbocharger. When the sludge state of the oil is serious, it will also affect the life of the diesel engine. That is, the rotational motion of the turbocharger shaft will throw the oil onto the inner wall of the casing, and the sludge will adhere and deposit on the inner wall of the casing. When excessive sludge deposits affect the oil return of the turbine end bearing journal, it will be deposited in the turbine end bearing. The sludge will be baked into hard coke due to the high temperature from the exhaust gas. When the coke peels off, the turbine end bearing and journal will wear, and the oil seal will leak before it wears. If oil leakage is found at the turbine end of the turbocharger, it is necessary to check whether the oil return pipe of the supercharger and the diesel engine ventilation pipe are blocked. The supercharger can only work after these faults are eliminated. The formation of sludge deposits is caused by the oxidation and deterioration of diesel engine oil. The fundamental reasons for the oxidation and deterioration of engine oil are the overheating of the diesel engine, excessive gas passing between the piston and the cylinder wall, diesel mixed with the engine oil, and cooling water leaking into the oil. , Improper selection of engine oil and failure to replace the engine oil within the specified period.