The message to which you are about to reply is shown first. GO TO REPLY FORM



 VIEW    REPLY TO THIS MESSAGE    PRINT   SAVE 

Possible ABS Problem? 900 1996

uid 6573's pic
posted by  javalion on  Sun Oct 30 02:59 CST 2005
Author: [PROFILE] [EVERY POST] [THREADS] [BEST POSTS] RSS Feed     [IGNORE ALL POSTS]
last visit: Wed Jul 23 09:57 CST 2014
[RELATED]

This is what I think is going on. Inside the brake booster there is a diaphragm. With the brakes not depressed the vacuum is equal on both sides of the diaphragm, other wise the brakes will always be on. When the brake pedal is depressed another valve opens and (higher) atmospheric pressure enters on one side of the diaphragm (the brake pedal side) thus forcing the pressure to the master cylinder. The reason why you have such good vacuum when you remove the one way valve is that the system is totally closed when the brakes pedal is not depressed. The whooshing sound you hear when you press the brake pedal is excessive air rushing in and through a hole in the diaphragm.
--
Tom F. Three Bricks, maintain two more.






USERNAME
Use "claim to be" below if you don't want to log in.
PASSWORD
I don't have an account. Sign me up.
CLAIM TO BE
Use only if you don't want to login (post anonymously).
ENTER CAPTCHA CODE
This is required for posting anonymously.
OPTIONS notify by email
Available only to user accounts.
SUBJECT
MODEL/YEAR
MESSAGE

DICTIONARY
LABEL(S) +
IMAGE URL *
[IMAGE LIBRARY (UPLOAD/SELECT)]

* = Field is optional.

+ = Enter space delimited labels for this post. An example entry: 240 muffler


©Jarrod Stenberg 1997-2022. All material except where indicated.


All participants agree to these terms.

Brickboard.com is not affiliated with nor sponsored by AB Volvo, Volvo Car Corporation, Volvo Cars of North America, Inc. or Ford Motor Company. Brickboard.com is a Volvo owner/enthusiast site, similar to a club, and does not intend to pose as an official Volvo site. The official Volvo site can be found here.