Rizal Philippines
April 5,2021
You need to bleed (purge the hydraulic fluid - mineral or DOT) when: 1. it is not working properly - the brake is weak, 2. when you cut the brake line, 3. it has been unserviced for a while and the fluid looks dirty.
There are 3 methods I know:
1. Without the tools taught to me by Vitul of Villamayor. You add fluid to the reservoir to the brim and keep pumping and watch the bubble come out.
2. With the bleeder kit:
1. The syringe method - you inject fluid from the bottom at the caliper and watch the bubbles
come out from the funnel installed at the top
2. Gravity method - you fill the funnel, open the bleeder at the bottom to empty at an empty plastic bag and watch the color of the fluid change. This method needs a lot of fluid
fluid
3. Combination - start with removal of air by pumping with the syringe at the bottom. When done
you remove the dirty fluid by gravity.
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