brake problems
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Joined: Sep 2010
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brake problems
hello i am having problems with the brakes on my truck a 1984 ford f250 hoping you all can help pin point my problem
here is the problem i have good brakes most of the time but sometimes when i hit the brakes they feel hard and will hardly stop if i step on them hard the rear brakes lock up but here is where it gets odd i can let off brakes hit them again and stops fine i can not find any leaking fluid on any wheel master is full the front brakes are in good shape and stop fine untill it gets a wild hair my guess is ether a master cylinder or maybe the proportioning vavle the master has been painted so i am guessing its been replaced at some time
here is the problem i have good brakes most of the time but sometimes when i hit the brakes they feel hard and will hardly stop if i step on them hard the rear brakes lock up but here is where it gets odd i can let off brakes hit them again and stops fine i can not find any leaking fluid on any wheel master is full the front brakes are in good shape and stop fine untill it gets a wild hair my guess is ether a master cylinder or maybe the proportioning vavle the master has been painted so i am guessing its been replaced at some time
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Joined: Jan 2010
Posts: 165
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I had to redo the whole breaking system in my 85 f150, most of the parts were good that i replaced but I worked my way back to the master cylinder, my problem was (aside from rear right break being seized) the breaks would work or they wouldent and I would have to hit them a few times, they would faid when they did work and I was leiking break fluid about 250ml a day driveing to work and back (30min to 1hr total)
try replaceing the master cylinder, just be sure to bleed it properly, and bleed all the lines.
try replaceing the master cylinder, just be sure to bleed it properly, and bleed all the lines.
Senior User
Joined: May 2010
Posts: 350
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From: Spartanburg, SC
Can the power brake booster be rebuilt or do you have to buy a new one? I know they aren't much, but was just asking the question. I see O'reilly's has the booster for $79 and the master cylinder for $39.
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