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MOT Failure - Foot brake 'efficiency'

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Old Jul 7th, 2020, 10:50   #71
amackenzie
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no thats fine , in good condition it should hold on the 2nd or 3rd click 👍
Sorry to jump in on this again but got more issues with my handbrake but happy to hear Neil has sorted his out!

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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Old Jul 7th, 2020, 12:35   #72
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Quote:
Originally Posted by amackenzie View Post
Sorry to jump in on this again but got more issues with my handbrake but happy to hear Neil has sorted his out!

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!
Check for a seized pivot at the end of the parking brake cable at the drum end ... it can cause issues like that.

Hope it helps.
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Old Jul 7th, 2020, 12:38   #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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Old Jul 7th, 2020, 14:33   #74
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Originally Posted by amackenzie View Post
Sorry to jump in on this again but got more issues with my handbrake but happy to hear Neil has sorted his out!

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!
it is not unknown for the expanders to be seized on the end of the cable in the drum . also the cars are getting older each year and maybe one or both of the cables are sticking .. its easy to test with the shoes removed ..
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Old Jul 7th, 2020, 15:25   #75
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it is not unknown for the expanders to be seized on the end of the cable in the drum . also the cars are getting older each year and maybe one or both of the cables are sticking .. its easy to test with the shoes removed ..
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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Old Jul 7th, 2020, 21:51   #76
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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?
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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Old Jul 9th, 2020, 23:31   #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.
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Old Jul 10th, 2020, 05:53   #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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Must be common issue mine f bc ailed 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.
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Old Jul 10th, 2020, 17:35   #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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