Treatment measures of fault causes
Oil pressure is too low
Too little oil
The viscosity of lubricating oil is too low.
Lubricating oil is deteriorated or diluted by fuel.
Oil pressure gauge is not allowed.
The oil pressure gauge pipe is blocked.
The lubricating oil system sucks air.
Blockage of oil supply system
Lubricating oil pump damaged
Poor adjustment of oil pressure gauge
The lubricating oil filter is blocked.
The system leaks oil, or the engine is excessively worn.
Too much oil is supplied to the rocker arm port.
Replenish new oil
Switch to new oil
Switch to new oil
Replace the pressure gauge with a new one, or calibrate and repair it.
Overhaul, clean and adjust the pipeline.
Inspection, repair and adjustment
Clean the oil supply system and make repairs and adjustments.
Overhaul and adjustment
Overhaul and adjustment
Clean or replace
Inspection and repair
Adjust the oil supply port
Oil pressure drops during operation.
The engine runs at full load for a long time, resulting in overheating.
Excessive scavenging
There is sintering in the lubrication part.
Stop for a while and calm down.
Overhaul and adjustment
Overhaul and adjustment
The oil pressure gauge vibrates greatly.
Too little oil
Oil pressure gauge and regulating valve are out of order.
Replenish lubricating oil
Overhaul and adjustment
Excessive oil pressure
The viscosity of lubricating oil is too high.
Fault of oil pressure regulating valve
Replace or mix with low viscosity oil.
Overhaul and adjustment
Excessive consumption of lubricating oil
Oil pan leaks oil.
The piston ring or cylinder wall is too worn and the clearance is too small.
The viscosity of lubricating oil is too small.
Too much oil and too high oil level.
Poor ventilation in crankcase
The pressure of lubricating oil is so high that it rushes into the combustion chamber.
Inspection and repair
Disassembly maintenance
Replace or add high viscosity lubricating oil.
Adjust the oil quantity and maintain the oil level.
Overhaul and adjustment
Adjust the lubricating oil pump and adjust the oil pressure.
Bearing burning and melting
The lubricating oil filter is blocked.
Lubricating oil is seriously deteriorated.
oil leak
Inhale dust and impurities or excessive moisture.
Clean or replace the filter.
Switch to new oil
Maintenance and plugging
Overhaul the oil filter and air filter.
Bearing burning and melting
Poor assembly or adjustment of bearings
Inferior bearing material
The viscosity or freezing point of lubricating oil is too high.
Lubricating oil has poor anti-wear performance and insufficient oil film strength.
Overhaul and adjustment
Switch to a good product
Replace it with new oil of suitable quality.
Replace it with new oil of suitable quality.
Piston ring cementation (snap ring)
Poor quality of lubricating oil
Lubricating oil is seriously deteriorated.
Too much or too little circulating lubricating oil.
Improper assembly of piston ring
Switch to high-quality lubricating oil
Switch to new oil
Adjust the oil quantity and repair the oil supply system.
Maintenance adjustment
Piston cementation or cylinder pulling
Insufficient supply of lubricating oil
Poor quality of lubricating oil
Improper assembly clearance
Disassembly, overhaul and adjustment
Switch to high-grade lubricating oil with proper viscosity.
Disassembly, overhaul and adjustment
Piston ring wear
The surface finish of gas inner wall is too high, so it is difficult to keep the oil film from breaking.
Lubricating oil has poor wear resistance.
Make the surface smoothness of the inner wall of the cylinder appropriate and enhance the oil film strength.
Switch to high-grade oil with good wear resistance.
Piston wear
Uneven cooling of cylinder and high temperature of cylinder head.
Lubricating oil has poor wear resistance.
Improve the cooling water flow.
Switch to high-grade oil with good wear resistance.