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Old 11-02-2013, 07:09 PM   #1
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Default Removing Brake Booster 1986 F150 5.0

I replaced the master cylinder on my 1986 F150 regular cap 5.0 last weekend. After bleeding the brakes RR, LR, RF, LF I took it for a test drive and the pedal sounds like it is bleeding air. Everything that I can find indicates that the booster is bad (vacuum line is pulling a strong vacuum when running). I removed the master cylinder from the booster, removed the 4 nuts inside the cab holding the booster to the firewall, disconnected the booster from the cable and the brake pedal. When I tried to lift out the booster it wouldn't budge. Acts like there is something else holding it to the firewall but I can't see anything. The Haynes manual doesn't show anything. What am I missing? I tried to pry it loose, put nuts back on the booster bolts and tapped it with a hammer after placing a block on the bolts. I'm open to suggestions! This looks like a straightforward job and it is whoopin my behind.
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Old 11-03-2013, 02:49 PM   #2
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Its just stuck to the firewall very good from the gasket, basically glued. I had the same problem a month ago on a parts truck and used a pry bar to get it free.
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Old 11-05-2013, 09:03 AM   #3
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Default Removing Brake Booster 1986 F150 5.0

I thought that it might be glued but I was afraid to pry on it because I didn't want to dent the firewall (when I grab the booster I can shake the truck!) I'll give the pry bar a try. Thanks
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Old 04-07-2014, 09:56 AM   #4
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I am curious about how that went with the pry bar!
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Old 04-07-2014, 07:45 PM   #5
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Once you get the bolts off, just go to each side and work it loose with the pry bar. Firewall will flex a bit but it does come off as long as its all unhooked.
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86 f150, brake booster, brakes, master cylinder

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