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For the cause of the cracking of the gear cover, the following series of effective countermeasures can be taken.
The four-point positioning is originally designed by the locomotive. Under the premise of ensuring the clearance between the inner side of the gear cover and the gear end face (3 1-2 mm for the pinion end and 13 3-2 mm for the large gear end), the purchase or processing specifications are complete. The gasket is carefully and repeatedly adjusted to be as flush as possible to minimize internal stress.
The original gear cover has a wall thickness of 3mm Boshan Qingshui Pump, and all of the gear covers with a wall thickness of 5mm are now purchased, which greatly improves the strength and rigidity of the cover. Reduce fatigue damage and increase service life.
The gear cover of the cracked part is all removed and repaired, and the old welding wave is partially removed and re-welded to eliminate the problem that the welding part of the original welding is not welded and the welding angle is not accurate, so as to ensure the welding quality.
Once you find that you are not responsible for getting off the train and repairing the old solder wave, you will be given financial penalties. At the flight attendant learning meeting, the role of tightening bolts and the importance of installation were reiterated. The maintenance driver inspected the loosening and loosening of the bolts on a daily basis. Once the loose and lost were found, the company immediately imposed economic penalties.
After adopting the above specific measures, all indicators can show a downward trend.