Author Rear disk touching the caliper carrier  (Read 1810 times)

0 Members and 1 Guest are viewing this topic.

  • Offline zx9landie   gb

    • XR Pro  ‐    130
    • ***
    • Topic Author

    Offline zx9landie

    • XR Pro
    • ***
    • Topic Author
    • Posts: 130
    • Bike: s1000xr
    • Town: Camberley
    • Country: gb
    Rear disk touching the caliper carrier
    on: January 26, 2022, 11:13:59 am
    January 26, 2022, 11:13:59 am
    Hi all,
    A strange 1 here.
    A damaged (partially crushed) rubber brake pipe caused the pistons to part company with the rear caliper as the pressure wasn't released after using the rear brake, so the pistons were fully 'pumped out' of the caliper body.
    Fortunately, I was less than a mile from home when things started to go pear shaped so I didn't end up on my arse !
    Things go so hot, I had a nice little fire of the rubber parts on the caliper when i rolled onto the drive !
    The rear brake was virtually 'jammed solid' - I put the little fire out and had to wait for things to cool down before I could start to investigate.   
    Anyway - replaced the caliper & mount with an 'as new' condition 2nd hand parts BUT......
    The disc is now permanently binding on the caliper carrier at the very front edge of the mount, causing the disc to get warm/hot.
    Obviously - not right & after (luckily) not dumping it previously, Mr Paranoid here is struggling to understand what's happening.
    It is almost like the rear wheel isn't tracking straight (which it is near enough - the adjusters are 0.3mm different according to my Vernier).
    I have a new disk on order as the old 1 is in a shocking state cosmetically but I'd be surprised if it's uniformly 'deformed/bent'.
    All spacers etc are in the correct places as per the on line exploded parts diagrams.
    I'm wondering if the heat transfer has caused a problem with the rubber seal on the rear bearings and will be checking when I fit the new rear disc but..... 
    Any thoughts/suggestions as to why the disc has 'apparently' moved over a few mm within it's running clearance as it is no longer central.
    Many thanks in advance.
     
    It just occurred to me - please could someone post a pic of their re wheel setup, disk side, to show how much of a 'gap' they have between the space on the side and the rear wheel as this would show if my spacer is sitting 'too far' into the wheel, so by letting the caliper carrier more to far over.

    Many more thanks in advance.
     
    Last Edit: January 26, 2022, 04:21:14 pm by zx9landie

  • Online Antares   gb

    • XR God  ‐    1296
    • *****
      #1

    Online Antares

    • XR God
    • *****
    • Posts: 1296
    • Bike: 2015 XR Sport SE
    • Town: Staines/Kirklees
    • Country: gb
    Re: Rear disk touching the caliper carrier
    Reply #1 on: January 26, 2022, 02:37:32 pm
    January 26, 2022, 02:37:32 pm
    *Originally Posted by zx9landie [+]
    Hi all,
    A strange 1 here.
    A damaged (partially crushed) rubber brake pipe caused the pistons to part company with the rear caliper as the pressure wasn't released after using the rear brake, so the pistons were fully 'pumped out' of the caliper body.
    Fortunately, I was less than a mile from home when things started to go pear shaped so I didn't end up on my arse !
    Things go so hot, I had a nice little fire of the rubber parts on the caliper when i rolled onto the drive !
    The rear brake was virtually 'jammed solid' - I put the little fire out and had to wait for things to cool down before I could start to investigate.   
    Anyway - replaced the caliper & mount with an 'as new' condition 2nd hand parts BUT......
    The disc is now permanently binding on the caliper carrier at the very front edge of the mount, causing the disc to get warm/hot.
    Obviously - not right & after (luckily) not dumping it previously, Mr Paranoid here is struggling to understand what's happening.
    It is almost like the rear wheel isn't tracking straight (which it is near enough - the adjusters are 0.3mm different according to my Vernier).
    I have a new disk on order as the old 1 is in a shocking state cosmetically but I'd be surprised if it's uniformly 'deformed/bent'.
    All spacers etc are in the correct places as per the on line exploded parts diagrams.
    I'm wondering if the heat transfer has caused a problem with the rubber seal on the rear bearings and will be checking when I fit the new rear disc but..... 
    Any thoughts/suggestions as to why the disc has 'apparently' moved over a few mm within it's running clearance as it is no longer central.
    Many thanks in advance.
     

     

    Hey it's 99% possible the rear disc was warped from the heat of binding up as it's not a floating disc, The disc and the callipers are on the same axis so they should always be in line with each other regardless of wheel alignment.

  • Offline zx9landie   gb

    • XR Pro  ‐    130
    • ***
    • Topic Author
    • #2

    Offline zx9landie

    • XR Pro
    • ***
    • Topic Author
    • Posts: 130
    • Bike: s1000xr
    • Town: Camberley
    • Country: gb
    Re: Rear disk touching the caliper carrier
    Reply #2 on: January 26, 2022, 04:24:14 pm
    January 26, 2022, 04:24:14 pm
    Thanks for the reply Antares - the disc is defo my 1st thought.
    The other thoughts are random but maybe/possibles.
    I guess I have too much time on my hands as I cant ride me bike !  :038: :038:

  • Online RyanGTXR   gb

    • XR Pro  ‐    370
    • ***
      #3

    Online RyanGTXR

    • XR Pro
    • ***
    • Posts: 370
    • Bike: KTM 1290 GT
    • Town: Notts
    • Country: gb
    Re: Rear disk touching the caliper carrier
    Reply #3 on: January 26, 2022, 06:04:58 pm
    January 26, 2022, 06:04:58 pm
    Firstly, do not set your rear wheel alignment by the swingarm marks or by measuring the swing arm, that is in no way accurate, 2 long straight edges are the best way to make sure it's correct.

    Make sure the caliper mount is sat on it's lug properly,
    as above something could be warped

    Last Edit: January 26, 2022, 06:07:05 pm by RyanGTXR

  • Offline smithy   au

    • XR God  ‐    2326
    • *****
      #4

    Offline smithy

    • XR God
    • *****
    • Posts: 2326
    • Bike: 2017 S1000XR
    • Town: Brisvegas.
    • Country: au
    Re: Rear disk touching the caliper carrier
    Reply #4 on: January 26, 2022, 07:08:15 pm
    January 26, 2022, 07:08:15 pm
    *Originally Posted by zx9landie [+]
    Hi all,
    A strange 1 here.
    A damaged (partially crushed) rubber brake pipe caused the pistons to part company with the rear caliper as the pressure wasn't released after using the rear brake, so the pistons were fully 'pumped out' of the caliper body.
    Fortunately, I was less than a mile from home when things started to go pear shaped so I didn't end up on my arse !
    Things go so hot, I had a nice little fire of the rubber parts on the caliper when i rolled onto the drive !
    The rear brake was virtually 'jammed solid' - I put the little fire out and had to wait for things to cool down before I could start to investigate.   
    Anyway - replaced the caliper & mount with an 'as new' condition 2nd hand parts BUT......
    The disc is now permanently binding on the caliper carrier at the very front edge of the mount, causing the disc to get warm/hot.
    Obviously - not right & after (luckily) not dumping it previously, Mr Paranoid here is struggling to understand what's happening.
    It is almost like the rear wheel isn't tracking straight (which it is near enough - the adjusters are 0.3mm different according to my Vernier).
    I have a new disk on order as the old 1 is in a shocking state cosmetically but I'd be surprised if it's uniformly 'deformed/bent'.
    All spacers etc are in the correct places as per the on line exploded parts diagrams.
    I'm wondering if the heat transfer has caused a problem with the rubber seal on the rear bearings and will be checking when I fit the new rear disc but..... 
    Any thoughts/suggestions as to why the disc has 'apparently' moved over a few mm within it's running clearance as it is no longer central.
    Many thanks in advance.
     
    It just occurred to me - please could someone post a pic of their re wheel setup, disk side, to show how much of a 'gap' they have between the space on the side and the rear wheel as this would show if my spacer is sitting 'too far' into the wheel, so by letting the caliper carrier more to far over.

    Many more thanks in advance.

    Sounds like it's not been re-assembled correctly. Can you take a photo of the axle spacers etc for us.??

    Smithy.
    When I die, I want to go peacefully in my sleep like my Grandfather....not screaming like the passengers in his car..!

  • Online Mareng1   gb

    • XR God  ‐    1602
    • *****
      #5

    Online Mareng1

    • XR God
    • *****
    • Posts: 1602
    • Bike: S1000XR
    • Town: Cumbria
    • Country: gb
    Re: Rear disk touching the caliper carrier
    Reply #5 on: January 27, 2022, 09:10:27 am
    January 27, 2022, 09:10:27 am
    Is the caliper definitely from an XR?  Just wondering if there is a slight difference to the RR or the R - and you've bought one of them.   (not too likely - but you never know)

    Otherwise - as above - I'd suspect that you have the washers or something not quite right.

    The disc is unlikely to end up convex/concave throughout - with excessive heat.

  • Offline zx9landie   gb

    • XR Pro  ‐    130
    • ***
    • Topic Author
    • #6

    Offline zx9landie

    • XR Pro
    • ***
    • Topic Author
    • Posts: 130
    • Bike: s1000xr
    • Town: Camberley
    • Country: gb
    Re: Rear disk touching the caliper carrier
    Reply #6 on: January 31, 2022, 11:09:43 am
    January 31, 2022, 11:09:43 am
    *Originally Posted by smithy [+]
    Sounds like it's not been re-assembled correctly. Can you take a photo of the axle spacers etc for us.??

    Smithy.

    Hi Smithy,
    Will take a pic this evening but there are only 2 actual 'spacers' that can 'fall out' when removing the rear wheel. All the others are internal to the wheel or sprocket carrier.
    As per the BMW parts diagram, the 'thinner' 1 goes into the wheel between the wheel & the caliper carrier (right hand side when viewed from the back of the bike) and the other 'Thinker' one goes between the sprocket carrier & the swinging arm (left hand side when viewed from the back of the bike).

    Cheers   

  • Offline zx9landie   gb

    • XR Pro  ‐    130
    • ***
    • Topic Author
    • #7

    Offline zx9landie

    • XR Pro
    • ***
    • Topic Author
    • Posts: 130
    • Bike: s1000xr
    • Town: Camberley
    • Country: gb
    Re: Rear disk touching the caliper carrier
    Reply #7 on: January 31, 2022, 11:12:25 am
    January 31, 2022, 11:12:25 am
    *Originally Posted by Mareng1 [+]
    Is the caliper definitely from an XR?  Just wondering if there is a slight difference to the RR or the R - and you've bought one of them.   (not too likely - but you never know)

    Otherwise - as above - I'd suspect that you have the washers or something not quite right.

    The disc is unlikely to end up convex/concave throughout - with excessive heat.

    Hi Mareng1,

    From a visual comparison, both the 2nd hand caliper & the caliper carrier are the  same as the originals on my bike.

    Cheers

  • Offline zx9landie   gb

    • XR Pro  ‐    130
    • ***
    • Topic Author
    • #8

    Offline zx9landie

    • XR Pro
    • ***
    • Topic Author
    • Posts: 130
    • Bike: s1000xr
    • Town: Camberley
    • Country: gb
    Re: Rear disk touching the caliper carrier
    Reply #8 on: January 31, 2022, 11:15:22 am
    January 31, 2022, 11:15:22 am
    *Originally Posted by RyanGTXR [+]
    Firstly, do not set your rear wheel alignment by the swingarm marks or by measuring the swing arm, that is in no way accurate, 2 long straight edges are the best way to make sure it's correct.

    Make sure the caliper mount is sat on it's lug properly,
    as above something could be warped

    Hi RyanGTXR,

    The caliper mount is defo on it's mounting lug correctly.

    I agree re something being 'warped/bent' but it's isolating the actual part.

    Cheers

  • Offline zx9landie   gb

    • XR Pro  ‐    130
    • ***
    • Topic Author
    • #9

    Offline zx9landie

    • XR Pro
    • ***
    • Topic Author
    • Posts: 130
    • Bike: s1000xr
    • Town: Camberley
    • Country: gb
    Re: Rear disk touching the caliper carrier
    Reply #9 on: February 01, 2022, 09:45:24 am
    February 01, 2022, 09:45:24 am
    Pic's below