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XC90 '02–'15 General Forum for the P2-platform XC90 model |
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MOT Failure - Foot brake 'efficiency'Views : 5185 Replies : 78Users Viewing This Thread : |
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Jul 7th, 2020, 09:50 | #71 | |
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As I mentioned before after adjusting the parking brake I had managed to get it to fully hold the car after 3 clicks. However now when I go to put the handbrake on it is taking all the range of motion, over 9 clicks to hold the car. Could I have tightened it up too much so that the shoes have been rubbing as I’ve been driving and have now been worn down? I haven’t felt any difference and haven’t smelt any burning brakes and my mpg hasn’t been affected? The only thing I have noticed is a low humming noise when travelling over 40mph. Now that it is taking almost 10 clicks to engage the handbrake can I assume that it can’t be rubbing on the wheel when it is fully released? I ask because even now when the handbrake is taking 10 clicks to engage I can still hear the low humming coming from the car when driving? It could be that I am just noticing this noise more now that I am having these issues.. Any pointers would be great, after getting it to hold at 3 clicks I thought I had finally managed to crack the xc90 handbrake problems! |
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Jul 7th, 2020, 11:35 | #72 | |
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Hope it helps.
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BMW X3 Msport MHEV 2020MY & VW Beetle Design 1.2Tsi DSG 2014MY Previous XC90 D5 SELux Geartronic 2009MY |
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Jul 7th, 2020, 11:38 | #73 |
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Good morning , I will step in if I may . I am an MOT tester & see several xc60 /90's / BMW X5's & Range rovers with the same issue .
Firstly the tester should not use the roller brake tester due to the vehicle being constant 4 wheel drive , you may well break /damage something . The correct method is to use a decelerometer , as this works through all the wheels & can increase the effort recorded , providing a pass . you cannot use the left in park argument to obtain a pass certificate . You may well cause a lot of unwarranted issues for the tester by implication of an incorrect test procedure having been performed , resulting in an appeal & disciplinary action against the tester . P on an auto box engages a pawl on the mainshaft , locking that . If a drive shaft snapped or a hub sheared the vehicle could well move unexpectedly . Also P on the auto box DOES NOT operate the parking ( emergency ) brake in any way , the parking brake is a totally separate system . As you have already noted your parking brake is foot operated & therefore NOT actioned by placing the auto box in P . If you actually saw the size of the locking pawl in an auto box you most certainly would think twice about resting several tons against it on a slope . Oh and we are nominated testers , never " inspectors "
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Jul 7th, 2020, 13:33 | #74 | |
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Jul 7th, 2020, 14:25 | #75 |
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And would that cause the noise that I’m hearing as well? Or would that only explain why it no longer holds the car very well even when fully applied?
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Jul 7th, 2020, 20:51 | #76 |
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it can cause a high pitch noise as the wheels rotate with the shoes rubbing the drum . Also a lot of your foot energy would be wasted forcing stiff expanders apart .
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Jul 9th, 2020, 22:31 | #77 |
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Must be common issue mine failed on handbrake as well req new shoes with adjusters and handbrake cables. all were replaced along with a rear wheel bearing ( didn't fail on that but replaced as noisy )
unluckily when I bought the car in feb I didn't check for the locking stud and had to get these replaced as well. Now really happy with lack of noise from rear and I now have a working handbrake. |
Jul 10th, 2020, 04:53 | #78 | |
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How hard was it to replace the handbrake cables ? Looks quite tricky from what I can see.
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Jul 10th, 2020, 16:35 | #79 |
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unfortunately I can't answer that as I took the easy route and gave it to a family member that has a garage ( materials cost only as I installed his cctv)
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