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VACUUM PUMP

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Old Feb 7, 2010 | 03:55 PM
  #16  
twags6's Avatar
twags6
Cargo Master
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Joined: Jan 2001
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From: Slatington, PA
Club FTE Gold Member
When the one on my dad's 97 PSD failed, it was the bearings. They wore down, finally overheated and blew the caps off the outside of the bearings. It must have been going for a long time because the new one provided so much more vacuum that he would nearly lock the brakes every time he stopped.

Maybe you're getting some type of contamination in the lines thats damaging the pump? Does it use brake fluid? Pull the line off the booster and check for fluid.
 
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Old Feb 7, 2010 | 04:00 PM
  #17  
z scpaes's Avatar
z scpaes
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Joined: Oct 2009
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From: Owensboro KY
Not sure what makes it fail but I replaced mine on 1991 F250HD Last month and it's producing about 25 inches of vacuum I think thats what it tested at.
 
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Old Feb 7, 2010 | 04:49 PM
  #18  
Kajtek1's Avatar
Kajtek1
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Joined: Apr 2006
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From: CA Bay Area
Originally Posted by Dieselthree
pump starts to make a lot of noise. Lose pressure on brake pedal. The first press on the pedal has some pressure. The second has almost none. I have had it replaced at two different dealers hips and two different independent shops.
Any REPUTABLE shop would offer you some technical explanation.
Did you save any of the broken pumps?
 
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