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Technical
CSP master cylinder adapters- disk brake kit
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<blockquote data-quote="Happystamps" data-source="post: 611450" data-attributes="member: 14679"><p>The residual pressure valves keep a wee bit of pressure in the lines from the master cylinder and the wheels, to balance out the force of the shoe springs*, which are trying to force fluid back up the lines into the master cylinder. So you take them off when you're fitting disc brakes, as they don't have those springs. This is why you take the valve off the port for the fronts, and not for the rears.</p><p></p><p>*there are residual pressure valves for disc brakes, but they're not really relevant here. They're more to do with applications where the fluid reservoir is lower down than the caliper, and they tend to overcome gravity more than anything else.</p></blockquote><p></p>
[QUOTE="Happystamps, post: 611450, member: 14679"] The residual pressure valves keep a wee bit of pressure in the lines from the master cylinder and the wheels, to balance out the force of the shoe springs*, which are trying to force fluid back up the lines into the master cylinder. So you take them off when you're fitting disc brakes, as they don't have those springs. This is why you take the valve off the port for the fronts, and not for the rears. *there are residual pressure valves for disc brakes, but they're not really relevant here. They're more to do with applications where the fluid reservoir is lower down than the caliper, and they tend to overcome gravity more than anything else. [/QUOTE]
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CSP master cylinder adapters- disk brake kit
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