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7.3L IDI Diesels (Not Power Strokes) Technical discussion of topics related to vehicles powered by the 7.3 Liter In-Direct Injection Navistar engines.

       
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Old 01-23-2008, 03:05 PM   #1 (permalink)
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Brake fulid leak at master cylinder

Is there a o-ring or seal of some type between the master cylinder and the brake booster on a 1993 F250 7.3 IDI ? Mine is leaking bad at that area and I need to get it fixed soon. Can the booster be bad?
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Old 01-23-2008, 03:20 PM   #2 (permalink)
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I beleive your master cyclinder is bad.
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Old 01-23-2008, 03:28 PM   #3 (permalink)
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Quote:
Originally Posted by excavator View Post
I beleive your master cyclinder is bad.
Agreed.

Just dealt with this on my buddy's '90 F250. Now it at least has front brakes again. (Rears still leak )
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Old 01-23-2008, 06:22 PM   #4 (permalink)
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A very small amount of brake fluid is OK for lubrication of the MC shaft..... BUT a large amount is bad due to the possibility of the booster being contaminated inside....... and failing.
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