|  1. To check up, whether gear wheel teeths are damaged, whether there are signs of excessive deterioration, on what specifies noise at work. | 
  
 
 | 2. The free wheeling between a gear wheel of a camshaft and a gear wheel of a cranked shaft should not exceed 0,27 mm; this backlash is necessary for checking in four various points on gear wheel perimetre. | 
  
  
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