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Reply To: How to diagnose brake master cylinder vs. brake servo/booster?

Home Forums Stay Dirty Lounge Service and Repair Questions Answered Here How to diagnose brake master cylinder vs. brake servo/booster? Reply To: How to diagnose brake master cylinder vs. brake servo/booster?

#963693
Nightflyr *Richard Kirshy
Participant

    10 – 15 in of vacuum should be enough to check it for any leaks and no, no need to press the brake pedal.
    Keep in mind if the was a leak in the brake booster, most likely you would have a harder brake pedal due to lack of vacuum.
    One other item to check would be the check valve on the boosters vacuum hose.

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