What are the common faults of loader accessories diesel engine?
Posted: Feb 5th, '25, 00:57
1. Black smoke from the exhaust pipe
(1) Starting is difficult or impossible, and black smoke is emitted, with slight backlash.
Faults: air filter or intake duct blockage; valve not tightly closed; cylinder wear is too severe; piston ring sintering; fuel supply advance angle is too large, etc.
(2) Severe exhaust at low speed, accompanied by body shaking and abnormal noise.
Faults: injector injection pressure is too low; injector seal is not tight or needle valve is stuck and dripping oil; injection pump supply is too large.
(3) The engine oil cleanliness is too poor (dirty) so that the engine oil contains too many impurities, which will accelerate the wear of bearings and shafts, causing the bearings and shafts to be scrapped due to wear in a short time.
(4) Exhaust temperature is too high (late fuel supply, excessive fuel supply, fuel nozzle dripping, exhaust leakage, etc. can cause the exhaust temperature to be too high), causing the blades at the turbine inlet to burn and deform, causing the oil at the turbine end seal to carbonize and the bearing to overheat locally, causing the seal and bearing to fail prematurely.
(5) Air filter blockage will cause the compressor intake negative pressure to be too high, causing the seal ring to leak oil.
2. Blue smoke from the exhaust pipe
(1) The diesel engine has severe exhaust at low temperature, and the exhaust will be reduced or disappear after the temperature rises.
Fault: The clearance between the cylinder and the piston is too large or the piston ring is slightly strained.
(2) The exhaust is slight at low speed, low temperature and small load, but severe at high speed, high temperature and large load. The greater the load, the more severe the exhaust, and smoke will burst out from the refueling port.
Faults: Severe sintering of piston rings; Severe wear or tear of cylinders (cylinder pulling); Too large clearance between valve guide rod and valve guide or failure of oil seal (oil seal ring), etc.
(3) Continuous exhaust under various working conditions
Fault: Cylinder gasket burns, causing the oil channel of the engine oil to communicate with the cylinder;
@ Common faults of turbochargers:
(1) Long-term idling of the engine will cause a certain negative pressure to be generated at the back of the turbocharger and impeller, causing the oil in the intermediate body to leak out.
(2) Long-term idling of the engine will lead to dry grinding due to lack of oil. The oil of the turbocharger comes from the engine oil pump. If the oil pump does not work properly, it will cause insufficient oil supply or too low oil pressure (the oil inlet pressure of the turbocharger should be greater than 0.2MPa to ensure the oil supply and normal lubrication of rotating parts such as bearings, and the oil pressure when the engine is idling is: 0.05~0.1MPa), which will cause damage to bearings due to poor lubrication.
(3) The cleanliness of the engine oil is too poor (dirty), so that the engine oil contains too many impurities, which will accelerate the wear of the bearings and shafts, causing the bearings and shafts to be scrapped due to wear in a short time.
(4) The exhaust temperature is too high (late oil supply, excessive oil supply, oil dripping from the injector, exhaust leakage, etc. can cause the exhaust temperature to be too high), causing the blades at the turbine inlet to burn and deform, causing the oil at the turbine end seal to carbonize and the bearing to overheat locally, causing the seal and bearing to fail prematurely.
(5) The blockage of the air filter will cause the compressor intake negative pressure to be too high, causing oil leakage in the sealing ring.
Loader accessories price
@Correct use of turbocharger:
The engine must be idled for 3-5 minutes after starting and before stopping. If the engine is running at high throttle after starting, the engine will be damaged due to delayed oil supply, poor lubrication and poor lubrication. If the engine is stopped immediately, the rotor speed of the turbocharger will be too high. Under the action of inertia, it will take a while for the turbocharger to stop. At this time, the oil pump will stop running due to the engine being stopped immediately, and the turbocharger will be in a short (period) state without oil lubrication. The rotor shaft and bearings will easily be damaged due to dry grinding, overheating, and expansion without oil lubrication.
3. White smoke from the exhaust pipe
(1) Difficult to start and white smoke from the exhaust pipe
Fault: There is water in the diesel or the diesel quality is poor; there is air in the fuel system.
(2) Grayish white smoke is emitted after starting, but the smoke is reduced or disappears as the speed and temperature increase.
Fault: Engine temperature is too low; injection timing is too late (part of the diesel is not burned. This situation will cause white smoke when the engine is cold, and black smoke when a small amount of diesel is burned in the exhaust pipe and discharged when the engine is hot);
(3) Continuous white smoke during normal operation
Fault: Cylinder gasket is burned, causing the water channel to communicate with the cylinder; Cracks in the cylinder liner or cylinder head, cooling water seeping into the cylinder, etc.
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for more info just visit our website at www.dig-dog.com
contact # : +86 158 6218 2088
email : sales@bonovogroup.com
(1) Starting is difficult or impossible, and black smoke is emitted, with slight backlash.
Faults: air filter or intake duct blockage; valve not tightly closed; cylinder wear is too severe; piston ring sintering; fuel supply advance angle is too large, etc.
(2) Severe exhaust at low speed, accompanied by body shaking and abnormal noise.
Faults: injector injection pressure is too low; injector seal is not tight or needle valve is stuck and dripping oil; injection pump supply is too large.
(3) The engine oil cleanliness is too poor (dirty) so that the engine oil contains too many impurities, which will accelerate the wear of bearings and shafts, causing the bearings and shafts to be scrapped due to wear in a short time.
(4) Exhaust temperature is too high (late fuel supply, excessive fuel supply, fuel nozzle dripping, exhaust leakage, etc. can cause the exhaust temperature to be too high), causing the blades at the turbine inlet to burn and deform, causing the oil at the turbine end seal to carbonize and the bearing to overheat locally, causing the seal and bearing to fail prematurely.
(5) Air filter blockage will cause the compressor intake negative pressure to be too high, causing the seal ring to leak oil.
2. Blue smoke from the exhaust pipe
(1) The diesel engine has severe exhaust at low temperature, and the exhaust will be reduced or disappear after the temperature rises.
Fault: The clearance between the cylinder and the piston is too large or the piston ring is slightly strained.
(2) The exhaust is slight at low speed, low temperature and small load, but severe at high speed, high temperature and large load. The greater the load, the more severe the exhaust, and smoke will burst out from the refueling port.
Faults: Severe sintering of piston rings; Severe wear or tear of cylinders (cylinder pulling); Too large clearance between valve guide rod and valve guide or failure of oil seal (oil seal ring), etc.
(3) Continuous exhaust under various working conditions
Fault: Cylinder gasket burns, causing the oil channel of the engine oil to communicate with the cylinder;
@ Common faults of turbochargers:
(1) Long-term idling of the engine will cause a certain negative pressure to be generated at the back of the turbocharger and impeller, causing the oil in the intermediate body to leak out.
(2) Long-term idling of the engine will lead to dry grinding due to lack of oil. The oil of the turbocharger comes from the engine oil pump. If the oil pump does not work properly, it will cause insufficient oil supply or too low oil pressure (the oil inlet pressure of the turbocharger should be greater than 0.2MPa to ensure the oil supply and normal lubrication of rotating parts such as bearings, and the oil pressure when the engine is idling is: 0.05~0.1MPa), which will cause damage to bearings due to poor lubrication.
(3) The cleanliness of the engine oil is too poor (dirty), so that the engine oil contains too many impurities, which will accelerate the wear of the bearings and shafts, causing the bearings and shafts to be scrapped due to wear in a short time.
(4) The exhaust temperature is too high (late oil supply, excessive oil supply, oil dripping from the injector, exhaust leakage, etc. can cause the exhaust temperature to be too high), causing the blades at the turbine inlet to burn and deform, causing the oil at the turbine end seal to carbonize and the bearing to overheat locally, causing the seal and bearing to fail prematurely.
(5) The blockage of the air filter will cause the compressor intake negative pressure to be too high, causing oil leakage in the sealing ring.
Loader accessories price
@Correct use of turbocharger:
The engine must be idled for 3-5 minutes after starting and before stopping. If the engine is running at high throttle after starting, the engine will be damaged due to delayed oil supply, poor lubrication and poor lubrication. If the engine is stopped immediately, the rotor speed of the turbocharger will be too high. Under the action of inertia, it will take a while for the turbocharger to stop. At this time, the oil pump will stop running due to the engine being stopped immediately, and the turbocharger will be in a short (period) state without oil lubrication. The rotor shaft and bearings will easily be damaged due to dry grinding, overheating, and expansion without oil lubrication.
3. White smoke from the exhaust pipe
(1) Difficult to start and white smoke from the exhaust pipe
Fault: There is water in the diesel or the diesel quality is poor; there is air in the fuel system.
(2) Grayish white smoke is emitted after starting, but the smoke is reduced or disappears as the speed and temperature increase.
Fault: Engine temperature is too low; injection timing is too late (part of the diesel is not burned. This situation will cause white smoke when the engine is cold, and black smoke when a small amount of diesel is burned in the exhaust pipe and discharged when the engine is hot);
(3) Continuous white smoke during normal operation
Fault: Cylinder gasket is burned, causing the water channel to communicate with the cylinder; Cracks in the cylinder liner or cylinder head, cooling water seeping into the cylinder, etc.
Buy a small excavator, buy a second-hand small excavator, buy excavator parts, sell excavator parts, buy a small excavator
Choose DIG-DOG for high-quality, customizable brush cutters for skid steers with fast delivery. Contact us today to discover how our superior products can enhance your land management tasks!
for more info just visit our website at www.dig-dog.com
contact # : +86 158 6218 2088
email : sales@bonovogroup.com