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  #1  
Old 06-21-2020, 01:48 PM
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henrys47merc henrys47merc is offline
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Default checking brake booster

Quote: use a hand pump with gauge, pump it up to 20 psi and see if it leaks down. Put your foot on pedal ,a drop of 5 or 6 psi is okay.
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Old 06-21-2020, 02:19 PM
kenny c kenny c is offline
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That's vacuum not psi. But what is the problem?
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Old 06-21-2020, 06:28 PM
BlueNorther BlueNorther is offline
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the easiest way to test a booster is, with the engine turned off, pump the brake pedal 4-5-6 times until the pedal is rock hard. holding pedal down, start engine and idle, pedal should drop about 3/4" and be solid hard.

if the pedal is mushy, you have air in the lines, or a bad m/c.

if the pedal goes all the way to the floor, the brakes are not adjusted right, or you got a bad m/c.

also make sure the push-rod between the booster and m/c is the right length.
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Old 06-21-2020, 08:56 PM
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Default brake booster

almost got it right Made you think anyway.
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Old 06-22-2020, 09:10 AM
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Quote:
Originally Posted by henrys47merc View Post
almost got it right Made you think anyway.


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