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Brake pedal hard to push down

  #1  
Old 11-09-2016, 10:39 PM
Bradley Street's Avatar
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Default Brake pedal hard to push down

Brake pedal is hard to push down with it running and off please help me figure it out
 
  #2  
Old 11-10-2016, 12:43 PM
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the power brakes are these trucks are powered by a vacuum booster (big round ball behind the master cylinder) it either blew out or the vacuum line going to it broke. pull the big rubber line off the vacuum booster with the truck running and see if it has vacuum if it does then the booster is probably bad
 
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