Why doesn't my right ebrake work?, It's the asymmetric cables, dummy. |
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Why doesn't my right ebrake work?, It's the asymmetric cables, dummy. |
davesprinkle |
Dec 3 2009, 10:14 AM
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#1
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Senior Member Group: Members Posts: 720 Joined: 13-October 04 From: Berkeley, CA Member No.: 2,943 Region Association: None |
Here's why most modern cars have the ebrake handle in the middle of the car -- it's so the cables running to the wheels have identical length and path. How do I know? Here's the anecdote:
For the last year, I've been struggling with my ebrake system. The right caliper just wouldn't clamp as tightly as the left. I've got rebuilt calipers, new pads, new cables, proper clearance, but no worky. Finally found out why. It's the internal drag of the actuation cables. The passenger-side cable is substantially longer than the driver side. Also, the right-side cable has 3 right-angle bends vs the left-side cable with none. This results in so much internal friction that the cable just binds solid when it's pulled. I was able to improve the situation somewhat by lubricating the cable. Still not perfect, but much better. |
Chicken |
Dec 4 2009, 11:51 AM
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#2
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Newbie Group: Members Posts: 8 Joined: 24-July 08 From: Houston Texas Member No.: 9,350 Region Association: None |
quite simply adjust the cables so the RR makes contact first and your system shold work fine....
oh and find me any manufactuere that Today will call it an Emergency brake |
davesprinkle |
Dec 4 2009, 12:26 PM
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#3
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Senior Member Group: Members Posts: 720 Joined: 13-October 04 From: Berkeley, CA Member No.: 2,943 Region Association: None |
quite simply adjust the cables so the RR makes contact first and your system shold work fine.... Of course. This works in theory. But it fails when we have high cable friction. That's the whole problem. The force balance is equalizing forces at the wrong point in the system. QUOTE oh and find me any manufactuere that Today will call it an Emergency brake I call the system an "emergency brake" as a reference to its design intent and function. The manufacturers' choice of name is irrelevant in that context. |
SirAndy |
Dec 4 2009, 12:45 PM
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#4
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Resident German Group: Admin Posts: 41,669 Joined: 21-January 03 From: Oakland, Kalifornia Member No.: 179 Region Association: Northern California |
QUOTE oh and find me any manufactuere that Today will call it an Emergency brake I call the system an "emergency brake" as a reference to its design intent and function. The manufacturers' choice of name is irrelevant in that context. You can call it all you want. (IMG:style_emoticons/default/biggrin.gif) At the end of the day, it's still a PARKING brake ... (IMG:style_emoticons/default/shades.gif) Andy |
davesprinkle |
Dec 4 2009, 12:56 PM
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#5
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Senior Member Group: Members Posts: 720 Joined: 13-October 04 From: Berkeley, CA Member No.: 2,943 Region Association: None |
QUOTE oh and find me any manufactuere that Today will call it an Emergency brake I call the system an "emergency brake" as a reference to its design intent and function. The manufacturers' choice of name is irrelevant in that context. You can call it all you want. (IMG:style_emoticons/default/biggrin.gif) At the end of the day, it's still a PARKING brake ... (IMG:style_emoticons/default/shades.gif) Andy Sure. That's one of its functions. Its other function is as an EMERGENCY brake. Setting aside the semantics, lube your BRAKE cable, dammit. (IMG:style_emoticons/default/dead horse.gif) |
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