Summer on how to prevent burning diesel engine bearings

A, to improve the quality of bearing maintenance and assembly, and strictly control the passing rate on the bus link. Raise the bearing hinges with the quality of the bearing on the back is smooth, without spots, positioning bump intact; own bounce volume 0.5 ~ 1.5mm, which can ensure that after the bush with self-assembled bearing hole stretch and fit tightly; on the new the old link be asked to measure the degree of parallelism and twist on the unqualified prohibition on the train connecting rod; installed in the upper and lower bearing bushing 2 bearing at each end should be higher than the flat 30 ~ 50mm, higher can guarantee the required amount of tightening torque bearing cap bolts bearing and bearing closely with the Health and sufficient locking force of friction, the bearings will not loose, cooling effect, prevent erosion and wear of bearings; bearing the face can not be Law scraper with 75% to 85% contact with prints for measure, should not scrape when the bearing and journal meet the gap to meet the requirement. In addition, the assembly should pay attention to check the crankshaft journal and bearing the processing quality, strict implementation of the repair process specifications, and prevent improper loading method and the result of improper installation of bearing bolt torque uneven or non-compliance, resulting in bending and stress concentration, leading to early bearing damage.
     B, strictly diesel engine block main bearing bore concentricity and roundness measurements. For the main bearing body bore concentricity measurement, must be determined on the engine block of the coaxial measurements more accurate, while measuring runout of the crankshaft, thus matching the thickness of the bearing, so oily in the axial gap to reach agreement . Van Diesel happened grind watts, Speed, etc. are assembled before the main bearing hole on the body for testing coaxial, ductile iron crankshaft all grow up to 0.14mm, steel crank all grow up to 0.12mm, while the body bearing hole roundness, cylindrical form also requested. Exceed the limit is disabled, if the limits, the use of grinding method (that is bearing on the amount of red lead powder coated to, after turning into the crankshaft, then remove the bearing caps to inspect the bearing, with hard points on the convex scraping out the site for processing, the measurement of the change in size, thus ensuring the reliability of the use.

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