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Old Dec 2, 2012 | 06:36 PM
  #1  
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brake issues

i have a 79 f150
i changed two brake lines and master cylinder and bleed,and more bleed,but still very soft all most to floor? wheel cylinders look good.
 
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Old Dec 3, 2012 | 12:40 PM
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1. still have a stubborn air bubble floating in the system
2. The new master is defective
 
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Old Dec 9, 2012 | 04:28 PM
  #3  
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crop harvester
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try clamping one at a time all four brake calipers or wheel cylinders hoses, if that dont yeild better pedal,then try bleeding master cyl. be careful when bench bleeding mc not to push piston to far some can be damaged,as far as the piston cups. if you bleed to long you will create to many air bubbles then you need to take a break.
 
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