Re: Soft brake pedal

Posted by Owen_Dyneto On 2014/2/20 12:11:54

....but it's in a closed system

Not quite, the filler cap is vented so that each time the brakes are applied and the fluid level drops, some air (probably with some moisture) is drawn in, and then expelled again when the pedal is released and the fluid level returns to normal. Enough repetitive cycles combined especially with use in high humidity conditions will eventually work it's evil. That's why it's best to change fluid at some interval.