This is the last part of Shangchai diesel engine troubleshooting guidelines. Apart for the content of troubleshooting, other contents like engine storage is added.
Fault feature
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Possible cause |
Correction
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The engine can not reach the rated power.
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(1) Wear of the turbocharger bearing.
(2) There is dirt on the blades and housing of the compressor.
(3) Too much carbon deposit at the back of the blades and seal ring of the turbine and compressor and turbine.
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Let a professional serviceman replace the bearing.
Let a professional serviceman clean the turbocharger.
Let a professional serviceman clean the turbocharger. |
\the exhaust color is abnormal. There is black smoke (not enough of inlet air)
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(1) There is dirt on the compressor.
(2) Air leak at the compressor.
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Let a professional serviceman clean it.
Let a professional serviceman check the seal condition and remove the air leak problem.
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Abnormal noise and vibration
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(1) surge of the compressor, and large amplitude when the turbocharger vibrates (one of the reasons is that there is serious dirt in compressor inlet passage, air inlet pipe and turbine outlet passage)
(2) Incorrect assembly (lack of dynamic balance of turbine and compressor impeller is damaged by foreign material.
(3) The turbine impeller or compressor impeller is damaged by foreign material.
(4) Collision of the turbine impeller to its housing due to deformation of the housing.
(5) There is foreign material in the passage of the turbine housing. Abnormal noise can be heard at idle.
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Let a professional serviceman clean the turbocharger.
Let a professional serviceman disassemble and inspect the turbocharger.
Let a professional serviceman check and repair the turbocharger. Replace the turbocharger if necessary.
Let a professional serviceman inspect the turbocharger. Replace the turbocharger if necessary.
Let a professional serviceman inspect the turbocharger. Check the intake and exhaust system.
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The impeller of turbine or/and compressor can not rotate or not spin freely.
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Serious carbon deposit on the turbine, back of compressor impeller and seal ring.
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Let a professional serviceman clean the turbocharger. Check the engine for poor combustion and oil leak.
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Bearing burn and collision between impellers and their housings.
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(1) Too dirty oil, too low oil pressure or block of oil pipe.
(2) Too high oil inlet temperature.
(3) Damage of the dynamic balance of the impellers of the turbine and compressor or incorrect assembly.
(4) High exhaust temperature and over speed of turbocharger.
(5) Deformation of the turbine housing.
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Check the lubricating system and change the oil and oil filter.
Find the cause and take measures to reduce oil temperature.
Let a professional serviceman check and make dynamic balance.
Check whether there are serious gas leak, deformation and block of the exhaust manifold or pipe, repair and clean them.
Check and find the cause. Replace the turbocharger if necessary.
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Speed drop, intake pressure drop, air leakage or abnormal noise.
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(1) wear of the turbocharger bushing, collision of the turbocharger impellers with their housing.
(2) The compressor intake passage is dirty, blocked or leaks.
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Let a professional serviceman repair the turbocharger. Replace the turbocharger if necessary.
Let a professional serviceman clean the turbocharger. Tighten joints and clamps.
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If the engine is to be out of service for a period of time (1 t0 3 months), measures of cleaning and necessary oil seal should be taken for rust protection.
(1) Clean the engine' surface and check for any dirt, or oil stain or water stain and rust. Dry the engine with compressed air. Apply anti-rust oil to the unpainted machining surfaces of the engine with a brush and keep the parts of rubber, plastic and fiber free from the anti-rust oil.
Caution: The surfaces of the front drive pulleys must be kept from rust.
(3) Let the drive belt in loose.
(4) Seal all ports of air, fuel, oil and coolant, as well as the air filter with damp-proof material or plastic one.
(5) Cover the engine with plastic cover or similar stuff and place the engine in a dry area with good ventilation.
7.1.2 During the storage
Charge the battery every month. Check the battery electrolyte level before charging. Crank the crankshafl three to four turns every month with barring tool four turns every month with barring tool.
7.1.3 After storage
When putting the engine into use, remove the fuel pump and send it to the authorized service provider for adjustment.
Remove the engine cover and all port seals. Install the fuel pump and prime the fuel system. Connect battery and install the belt. Check lubricating oil and coolant levels, and add proper amount of lubricating oil into the turbocharger from its oil inlet. Crank the engine three to five circles with barring tool. Then follow the starting procedure in Section 4.5 to start the engine.
If the engine is to be out of service for a long time (more than 3 months), proper storage of the engine is required.
(1) On last engine operation, drain the lubricating oil in the engine and oil filter after the engine has stopped and cooled down to warm state. It is not necessary to drain coolant because it is anti-rust. Add qualified anti-rust oil (dewatered CF 15W 40 011) into the engine, start the engine to idle for l-1.5 minutes and stop it, then drain the anti-rust oil.
(2) Refer to Article l, 2, 3, 4 and 5 in Section 7.1.1 Short Time Storage for cleaning, preventing rust and other requirements. And put a tag which reads 'The engine does not contain oil and do not use it.
Refer t0 7.1.2 for storage.
When putting the engine into use, remove the fuel pump and send it to the authorized service provider for adjustment. Remove the engine cover and all port covers. Install the fuel pump and prime the fuel system. Connect battery and install the belt. Fill the engine and oil filter with clean lubricating oil and add proper amount of clean lubricating oil into turbocharger from its oil inlet. Check oil and coolant levels, and crank the engine three to five circles with barring tool. Then follow the starting procedures in Section 4.5 to start the engine. If the engine is stored for over 2 years, its coolant should be changed and its cooling system should be cleaned.
For more Shnagchai diesel engine troubleshotting guidelines:
Shangchai SC27G Series Abnormal Troubles
Solutions For Engine Abnormal Noise, Vibration and Smoke
Instructions For Engine Low Output and Abnormal Troubles
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