Low pressure due to the steering pump 
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|     •  | A seized or inoperative flow control valve |  
  
|     •  | An improperly installed pressure plate |  
  
|     •  | An improperly installed thrust plate |  
  
|     •  | A cracked pressure plate |  
  
|     •  | A broken pressure plate |  
  
|     •  | Vanes sticking in the rotor slots |  
  
|     •  | High internal pump leakage |  
  
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