Engine sliding bearings (lubricating) analysis
1, galling caused by tiny particles of foreign matter on the bush:

Dozens ml oil, oil filter and engine oil pan drain plug at the first outflow, the naked eye can see and more alloy powder, bearing rubs. This is caused by small particles of impurities into the movement of the bearing alloy layer surface on the bearing did not cause serious injury, but such phenomena continue to develop, not only bearing the early damage, the axis will be subject to serious injury, it must be in a timely manner according to the causes of exclusion, to avoid damage to the parts. Troubleshooting engine bearing life calculation by the use of time for normal wear and tear, abnormal wear of once small particles is equivalent to the engine to 2500 hours of normal use wear.

Tiny particles into the poor reasons: First, the filtration effect of the air filter or intake system sealed well, you want to check the air intake system ministries piping and connections, with or without rupture and loose, check the filter with or without loose , paper core with or without rupture. Repair or maintenance inspection of the entire intake system is very important, we must ensure reliability. Directly into the engine or engine oil and filter using the lubricant contaminated too long, all machine filter clogging, oil lubricated surfaces without filtration. Filling oil to pay attention to the cleanliness of the oil, with the necessary filtration machine Use the timely replacement of oil and filter. Third, the fuel supply excessive incomplete combustion, nozzle leakage, causing fuel to seep into the crankcase, while some of the impurities with the fuel into the crankcase and oil mixed together to reduce the lubrication effect. Engine in use to observe engine exhaust and functioning if anomalies to ascertain the reasons for repair or replacement. Fourth, when the engine assembly, the cleanliness of the internal parts. Repair and maintenance of the engine, be sure to pay attention to the cleaning of parts, installation should pay attention to prevent further pollution, to ensure internal cleanliness after installation.

No matter what kind of reasons, troubleshooting, engine oil and filter must be replaced. Engine start after repair of empty running two hours to stop running to check the oil in the alloy powder can be put into the half-load use, but in use the first few days must observe, confirm after 60 to 120 hours of operation to determine abnormal wear was completely removed, and then change the oil, the engine can be put into regular use. If abnormal wear in the continued development, we must stop the disintegration of the inspection and repair.

2, the larger particles foreign body and damage caused by poor quality lubricants on the bearing:

Larger particles of the alloy blocks or flakes in the oil filter and engine oil pan, shaft and bearing has been serious injury, must immediately stop the dismantling and repair, if you continue to use will cause more damage to components .

Reasons: the larger particles to enter the installation parts clean, such as processing rod bushing bore metal shavings left in the connecting rod oil passages, parts and oil passages sticky cutting or sediment, not thoroughly cleaned before installation or sports surface of the work piece machining burr flange is not removed, install bearing stick to larger particles of foreign matter or surface to be bumps. Damage caused by these phenomena on the bush is very serious. Maintenance and installation to carefully clean up the cleaning and inspection.



Other News:
Engine sliding bearings (lubricating) analysis
SKF bearing grease deterioration test method
Dynamic pressure thrust sliding bearing parameters
Hydraulic pump bearing fault diagnosis method research network
Solve the turbine bearing oil leakage
The OW series single rotation ball bearings structural characteristics
No oil lubricated bearings
INA angular contact ball bearing performance and testing methods