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1973 - 1979 F-100 & Larger F-Series Trucks Discuss the Dentsides Ford Truck
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Old Dec 8, 2005 | 09:56 PM
  #1  
sixshootingexp's Avatar
sixshootingexp
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Brakes

Pedal goes to floor, but does pump up when its full of fluid. Front (small) resevoir seems to leak. What is odd is that, when I go to check the level, it seems to have leaked into the rear (large) resevoir.
Because when I take the lid off, the front resevoir is empty, but fluid overflows out of the rear resevoir.
Any ideas?
This is a 2 wheel drive 79 F-150 with 6 cylinder. automatic
 

Last edited by sixshootingexp; Dec 8, 2005 at 09:58 PM. Reason: better description
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Old Dec 9, 2005 | 12:52 AM
  #2  
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internal seal leak in the plunger for the front resivoir. replacing the master cylinder is the best response. you could rebuild it but i bet thats more expensive.
 
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Old Dec 9, 2005 | 01:02 AM
  #3  
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ford390gashog
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i would buy a NEW master cylinder. notice how i did not say a rebuilt. the rebuilts are a crap shoot and can be a dangerous one at that. the problem is, is at the factory they hone the cylinder but they reuse the stock piston in the now enlarged hole. use a over sized o ring and hope for the best. these will leak or just rupture .
 
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Old Dec 9, 2005 | 04:08 AM
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Yes, I may have to replace it with a new one. The one on there now is remanufactured. I have only had it on there for ten thousand miles.
Thanks
 
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Old Dec 9, 2005 | 12:18 PM
  #5  
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There isn't anything wrong with the newer Rebuilt M/C's.
They are being rebuilt with new stainless steel sleeves, not with Cast sleeves which wear faster.

EIS is a brand to buy.
 
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Old Dec 9, 2005 | 12:37 PM
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sixshootingexp
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Turns out my rmanufactured master is still under warranty. I will be putting another one in from autozone.
Hope it does the trick. thanks again, Ilove my truck.
thanks
 
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