After the gear pump active shaft is worn, the gap is increased, which will affect the amount of pump. In this case, the method of repairing the transistors or bushing can be used to restore its normal fit gap. If the active shaft wear is slight, simply press the old bushing and replace the standard size bushing, the gap can be restored to the allowable range. If the active shaft is severe and the bushing is worn, it is necessary to replace the bushing, but also to replace the bushing, but the active shaft is also increased to the large diameter, and then grinded to the standard size, restore and bushing. Teamwork requirements.

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