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Old 21-09-2009   #1
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adjusting handbrake disc on rear

Hi.my sporting has rear disc brakes. The off side operates but wont hold. Could this be air in the system?
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Old 21-09-2009   #2
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Re: adjusting handbrake disc on rear

Do you mean it will not hold using the handbrake, or when someone operates the footbrake whilst you try to turn the wheel by hand?
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Old 21-09-2009   #3
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Re: adjusting handbrake disc on rear

Ahh, just re-read the title (thought I had read the word 'handbrake' somewhere). The mechanism is completely independent of the hydraulic system, so air in the system won't be the cause. Get someone to crawl under the car and watch the handbrake mechanism on the back of the caliper whilst you activate he handbrake. If it doesn't move, then the cable on that side is likely snapped.
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Old 21-09-2009   #4
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Re: adjusting handbrake disc on rear

It wont hold on the hand brake, i can turn the wheel by hand . There is some resistance though.
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Old 21-09-2009   #5
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Re: adjusting handbrake disc on rear

Thanks for that.
The cable rubber coating looks swollen in places. So does this mean internal rust?
The calipers are an addition , would the origional cables from the drum brakes be the correct length? Just one other thing , i adjusted the cables at the handbrake until the rear disc locked then let off the strain on the cable, but the disc stayed locked solid.Only after manipulating the cable did the arm rotate slightly and the disc release.
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Last edited by sporting chap; 21-09-2009 at 21:53.
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Old 22-09-2009   #6
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Re: adjusting handbrake disc on rear

From the symptoms you describe it sounds like the cable has corroded internally, causing it to seize up. I am afraid the drum cables and disc cables are different, so you will need a new cable suitable for your car from somewhere like shop4parts.co.uk or www.brakeparts.co.uk. On the disc brake system, the left and right cables are identical, unlike the drums.
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Old 23-09-2009   #7
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Re: adjusting handbrake disc on rear

Thanks very much. That will explain why i cant adjust the cable enough . It is in one case too short and the other not able to pull past a certain point, i will buy two new ones the same length for the disc model.
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Old 23-09-2009   #8
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Re: adjusting handbrake disc on rear

Hello again.You seem very clued up on the punto.Do you mind if i ask you some other questions? I will wait for your reply.
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Old 24-09-2009   #9
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Re: adjusting handbrake disc on rear

No worries, go ahead.
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