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GEN 2 (2017-2020) Ford F-150 Raptor Forums
Ford F-150 Raptor General Discussions [GEN 2]
2017 Master Cylinder / Brake booster failure
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<blockquote data-quote="FordTechOne" data-source="post: 1522366" data-attributes="member: 35543"><p><em></em></p><p><em></em></p><p>This is why Ford now recommends changing brake fluid every 3 years. As brake fluid is hygroscopic, it absorbs moisture, which over time results in damage to brake hydraulic components.</p><p></p><p></p><p></p><p>Unrelated. 2011-2012 3.5 GTDI models used an electronic vacuum pump mounted behind the driver's side headlight to provide vacuum during a cold start. Because of it's location it was susceptible to corrosion, which could cause it fail. This can result in a hard brake pedal (low power assist) only during a cold start. Even under those conditions, the ABS Module will sense the low vacuum and run the HCU to provide hydraulic assist.</p></blockquote><p></p>
[QUOTE="FordTechOne, post: 1522366, member: 35543"] [I] [/I] This is why Ford now recommends changing brake fluid every 3 years. As brake fluid is hygroscopic, it absorbs moisture, which over time results in damage to brake hydraulic components. [I][/I] Unrelated. 2011-2012 3.5 GTDI models used an electronic vacuum pump mounted behind the driver's side headlight to provide vacuum during a cold start. Because of it's location it was susceptible to corrosion, which could cause it fail. This can result in a hard brake pedal (low power assist) only during a cold start. Even under those conditions, the ABS Module will sense the low vacuum and run the HCU to provide hydraulic assist. [/QUOTE]
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GEN 2 (2017-2020) Ford F-150 Raptor Forums
Ford F-150 Raptor General Discussions [GEN 2]
2017 Master Cylinder / Brake booster failure
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