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Reasons and solutions for the heating up of the bearing bush I. The main reasons for the heating up of the bearing bush are as follows: 1. Abnormal operation of hydraulic catch wheel. 2. The gap between the wheel belt and the drum nderboarding is too large. 3. The circulating water is not smooth, the quantity is small or the internal circulation water pipe seeps. 4. Lubrication system failure. 1. ...