Posted by Owen Aaland on March 07, 2011 at 20:06:03 from (207.13.114.181):
In Reply to: vacume booster posted by Old Roy on March 07, 2011 at 18:14:56:
The whooshing sound might well be normal.
The booster works by having a diaphragm attached to the brake rod in the middle of the vacuum chamber with vacuum on each side. When you step on the pedal you allow air to enter the pedal side of the booster. Since the atmospheric pressure is greater than the vacuum the diaphragm assists in pushing the rod into the master cylinder to give you the assist with braking. A lot of trucks had the air inlet for the vacuum booster under or behind the drivers seat so hearing the noise would not be unusual.
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Today's Featured Article - The Day Mom Drove the 8N - by Brian Browning. My Dad was wanting to put in a garden but couldn't operate the 8N and handle the old horse drawn plow he had found and rigged up to use with the tractor. Well, he decided to go get Mom out of the house and have her drive the tractor while he walked behind the plow. You got to understand that while my Mom is a hard worker who will always help whenever she can... she had never operated farm machinery before that day. Dad got her out there, explained how the clutch was the same as in our o
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