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06-07-2021 01:40 PM #2
CHR Member/Contributor
- Join Date
- Sep 2007
- Location
- Gardner, KS
- Car Year, Make, Model: '33 HiBoy Coupe, '32 HiBoy Roadster
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- 11,244
The booster is just a big canister that captures a diaphragm between the two halves, with valving that puts vacuum on both sides at rest, and then when the pedal is pressed allows atmospheric pressure to press on the area of the diaphragm to assist pedal pressure. What this simplified diagram leaves out is that the "piston" against the diaphragm allows vacuum to pass by at rest, and seals when the pedal is depressed, trapping the vacuum downstream.
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brake-booster-1.jpg
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Sounds to me like the diaphragm is failing for some reason.Last edited by rspears; 06-07-2021 at 01:43 PM.
Roger
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I'm happy to see it back up, sure hope it lasts.
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