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1980 - 1986 Bullnose F100, F150 & Larger F-Series Trucks Discuss the Early Eighties Bullnose Ford Truck

Brake problem

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Old Apr 7, 2019 | 09:03 PM
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Christopher Workman's Avatar
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Brake problem

In my 1986 F250 4.9l my brake pedal is hard and when the engine is running it won't return. I suspected my brake booster. When I unbolted the brake booster I found that there was brake fluid that's leaked into it.
So, I assume my booster is shot.

My mom's boyfriend has a 1987 F150 that's been setting in his yard for about a year and a half. Would the brake booster out of it work on my 1986 F250? If not, would the booster out a junkyard truck most likely be seized from setting?
 
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Old Apr 7, 2019 | 10:20 PM
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The parts book says the F150 & 250 under 7000 GVW used the same booster (E4TZ 2005-A) at least through 1989 (where the book ends).
 
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Old Apr 8, 2019 | 07:45 PM
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That brake fluid got in the booster from the master so it needs to be replaced also.
Dave ----
 
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