1, the damage caused by the larger particles of foreign matter and poor quality lubricants bearing bush:
The alloy block larger particles or flakes in the oil filter and the engine oil pan, the shaft and the bush has been seriously damaged, you must immediately stop the demolition inspection and repair, if you continue to use the parts will cause more damage.
Larger particles into the reasons: installation parts no clean processing rod bushing hole when metal shavings left in the connecting rod oil Road the sticky cutting parts and oil Road or sediment not thoroughly cleaned before installation or related to the movement of surface workpiece machining burrs flanging not clear, stick with the larger particles of foreign matter or shaft surface is bruised when installing the bush. The damage caused by these phenomena on the bush are very serious. So in the maintenance and installation to carefully clean up the cleaning and inspection.
Mainly the lubricating effect of poor quality lubricants and cooling effect, the bearing and shaft wear exacerbate sports surface temperature of the damage caused by excessive bearing alloy melt, while low-grade lubricants lot of impurities oil filter quickly clogged containing The impurities in the lubricating oil without filtration directly into the moving surface, to further accelerate damage to the shaft and the bush. In accordance with the provisions of the purchase and replacement of oil must strictly control the quality of the lubricant, lubricant selected in accordance with the regulations.
2, do not move the damage caused by foreign objects on the shaft and the bush:
Larger foreign matter is sandwiched between the bush and the inner wall of the shoe mounting holes, and the moving surface of the pad will produce bumps, when the shaft running, abnormal wear will be started from the bumps on, and extended to the vicinity, causing the shaft and the bush early damage; if there is a large foreign body between the surface and the axis of the bearing movement after installation will be embedded in the bearing alloy layer, damage the shaft at the same time when the operation is also damage to the bush; shaft and tile and mounting holes with related parts if any touched knock convex points will be on the axis and tile damage or injury.
The causes and prevention of: axis, bush, bush hole (body, connecting rod) rust produce oxides or sticky sediment to carefully check the cleaning prior to installation, especially oil duct and tubing internal cavity; installation site must be kept away from dusty debris splashing venues; installed to use the tools to clean, and take the necessary protective measures to prevent recontamination assembly lubricants to clean dust mixed; shaft and bearing and bearing holes storage and installation, to ensure that not with any metal objects in contact and shall not have any touch knock operation.
3, galling caused by tiny particles of foreign matter on the bush:
When dozens ml of oil in the engine oil pan drain plug and oil filter, the first outflow, the naked eye can see, and more alloy powder, Bush has been galling. This is caused by tiny particles of impurities into the movement of the surface of the bearing alloy layer of bearing caused no serious damage, but such phenomena continue to grow, not only the bush early damage, the axis would also be a serious injury, so must a timely manner according to the causes of exclusion, to avoid damage to the parts. Troubleshooting rear engine bearing life can not be calculated by normal wear, the use of time, because the abnormal amount of wear of a tiny particles equivalent to the amount of wear of the engine 2500 hours of normal use.
Tiny particles into the reasons: First, the air cleaner filter effect or intake system seal is not good, you want to check the the intake system ministries pipeline junction, for cracks and loose, also check the filter for loose paper core or without rupture. Repair or maintenance of the inspection of the entire intake system is very important, to ensure reliability. The lubricant contaminated engine oil and filter all machine filter clogged too long, so that the lubricating surface oil directly into the filter without filtration. Third, excessive fuel oil combustion endless, the nozzle leak, causing the fuel to penetrate the crankcase, the same time, some of the impurities with the fuel into the crankcase and oil mixed together to reduce the lubricating effect. Engine in use to observe the smoke and the functioning of the engine, if abnormal timely identification of the reasons for repair or replacement. Fourth, when the engine is assembled, the cleanliness of the internal parts of the differential. Must pay attention to the cleanliness of the parts in the repair and maintenance of the engine, to prevent further contamination, and to ensure the cleanliness of the internal installed.
No matter what kind of reasons, troubleshooting must replace the engine engine oil and filter. Maintenance after the engine starts idling two hours to stop running to check alloy powder in the oil can be put into the use of semi-load, but in the first few days must observe, confirm abnormal wear after 60 to 120 hours of operation decision was completely removed, and then replace the oil, the engine can be put into normal use. If abnormal wear continue to develop, we must stop the use the disintegration of inspection and repair.


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