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D4 rear brake disk replacement
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xcentric
 


Member Since: 01 Apr 2015
Location: Shropshire, UK
Posts: 886

2012 Discovery 4 3.0 SDV6 HSE Auto Baltic BlueDiscovery 4
D4 rear brake disk replacement

Am using Bodsy's brake bible, but for the D4, there doesn't seem to be a parking brake ratchet screw to loosen through the rotor hole - is that correct? once the torq crew is off, can I then get the disk off? if so, why is there the other hole there?

oh, and having taken the whole calliper off, can I remove the pads without dismantling it further, or do I need to talk that apart?
  
Post #186340330th Sep 2017 2:39 pm
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Gareth
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Member Since: 07 Dec 2004
Location: Bramhall
Posts: 22718

United Kingdom 2013 Discovery 4 3.0 SDV6 HSE Lux Auto Fuji WhiteDiscovery 4

D3 and 4 are the same. Make sure your looking in the right place. It's at the top on one side, and 180 degrees different on the other.

Use the hole with the plastic plug, and move the disc around until you see the ratchet. A small powerful led torch helps.

The screw holds the disc to the hub.

Once the shoes are backed off, and the screw removed, the disc should come off.

You need to remove one or both of the slider bolts to release the caliper from the frame, to release the pads.
  
Post #186340430th Sep 2017 2:44 pm
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xcentric
 


Member Since: 01 Apr 2015
Location: Shropshire, UK
Posts: 886

2012 Discovery 4 3.0 SDV6 HSE Auto Baltic BlueDiscovery 4

ah found it. 11 o'clock, drivers side. Now I know I need to undo it, but which way is that? (i.e. which way is it installed; I know anticlockwise to unscrew Confused )
  
Post #186342230th Sep 2017 3:37 pm
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Apache
 


Member Since: 16 Oct 2011
Location: Yorkshire
Posts: 639

England 2008 Discovery 3 TDV6 Commercial Manual Stornoway GreyDiscovery 3

all the way until the disc comes off. Remove the T45 (don't hold me to the number) screw first.

I think its simply anticlockwise. Can't see them being left hand thread although is possible to fit them the wrong way (does that reverse the direction, head hurting on that one...).
  
Post #186344030th Sep 2017 4:20 pm
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xcentric
 


Member Since: 01 Apr 2015
Location: Shropshire, UK
Posts: 886

2012 Discovery 4 3.0 SDV6 HSE Auto Baltic BlueDiscovery 4

so, top away from me, right? ditto on the head hurting.....
  
Post #186344330th Sep 2017 4:29 pm
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xcentric
 


Member Since: 01 Apr 2015
Location: Shropshire, UK
Posts: 886

2012 Discovery 4 3.0 SDV6 HSE Auto Baltic BlueDiscovery 4

so it's probably top away from me Laughing made it turn a bit - hard to tell, really. Disk rotor now off, anyway.

next issue is that to undo the calliper, I need a thinner spanner than the Halfords Professional ones I have. Did have a cheapo set, but can I find them when I need them? At this rate I'll be better equipped than KwikFit.....
  
Post #186345730th Sep 2017 5:27 pm
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Apache
 


Member Since: 16 Oct 2011
Location: Yorkshire
Posts: 639

England 2008 Discovery 3 TDV6 Commercial Manual Stornoway GreyDiscovery 3

One way expands the shoes so the disc gets tighter. There should be more loosening adjustment than tightening. Don't be afraid to put a little squirt of WD40 through the hole.

My gut feeling is to loosen you go from centre of wheel to outside, using a flat screwdriver.

A tap with a hammer and my fat Halfords spanner is enough to stop the calliper bolt spinning. I did buy a thin one off ebay. My old Halfords set was thin enough. Once the bolt is spinning and free they come out pretty easily IME
  
Post #186346030th Sep 2017 5:33 pm
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Apache
 


Member Since: 16 Oct 2011
Location: Yorkshire
Posts: 639

England 2008 Discovery 3 TDV6 Commercial Manual Stornoway GreyDiscovery 3

http://www.ebay.co.uk/itm/SILVERLINE-SLIM-...Sw54xUYdgV

might just chuck one of these in the car toolbox
  
Post #186346230th Sep 2017 5:35 pm
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xcentric
 


Member Since: 01 Apr 2015
Location: Shropshire, UK
Posts: 886

2012 Discovery 4 3.0 SDV6 HSE Auto Baltic BlueDiscovery 4

ta. And as everything is off, am looking at replacing the epb shoes. However, it's hard to tell what's shoe and what's backing - which might mean it's got no shoe left..... is there a good way to tell?
  
Post #186346330th Sep 2017 5:37 pm
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Apache
 


Member Since: 16 Oct 2011
Location: Yorkshire
Posts: 639

England 2008 Discovery 3 TDV6 Commercial Manual Stornoway GreyDiscovery 3

It's like granular contact medium and obviously raised

https://www.advancedfactors.co.uk/ekmps/sh...1674-p.png

Will be black when in use. The shoes have a 'hammered' type finish so do have some texture.
  
Post #186346830th Sep 2017 5:49 pm
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xcentric
 


Member Since: 01 Apr 2015
Location: Shropshire, UK
Posts: 886

2012 Discovery 4 3.0 SDV6 HSE Auto Baltic BlueDiscovery 4

is that chamfered edge up to the pad all brake pad? so if I've still got some of that, it's fine (even though black)? it's all pretty smooth, so am thinking most/all of the pad has gone. What's the min thickness before replacement?
  
Post #186346930th Sep 2017 5:54 pm
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Apache
 


Member Since: 16 Oct 2011
Location: Yorkshire
Posts: 639

England 2008 Discovery 3 TDV6 Commercial Manual Stornoway GreyDiscovery 3

No idea. I've seen them de-laminate but never wear down to the metal.

They are not expensive to swap but fiddly. I'd not do them if everything looks ok and in good condition (just adjust them properly). Lever out the adjuster and give it a clean up/lubricate. Put some copper slip behind on the raised contact points on the backing disc.
  
Post #186347430th Sep 2017 6:08 pm
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M3DPO
 


Member Since: 22 Sep 2010
Location: Notts.
Posts: 4174

England 2005 Discovery 3 TDV6 HSE Auto Baltic BlueDiscovery 3

xcentric wrote:
ah found it. 11 o'clock, drivers side. Now I know I need to undo it, but which way is that? (i.e. which way is it installed; I know anticlockwise to unscrew Confused )


On the very outside edge of the backplate you will find a notch, line the hole up with it Thumbs Up
 It can when others can't,
It will when others won't,
It goes where others don't. 
 
Post #186348430th Sep 2017 6:46 pm
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DrRobH
 


Member Since: 10 Oct 2015
Location: Hampshire
Posts: 504

United Kingdom 

Bodsy lives in Shropshire. Get him over to do it and save you the hassle Thumbs Up
 Visitor from RRSport.co.uk
RR Sport SDV6 MY12
RR Classic 1993 Tdi
Both do 32mpg and are 19 years apart in age, 
 
Post #186350830th Sep 2017 8:18 pm
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xcentric
 


Member Since: 01 Apr 2015
Location: Shropshire, UK
Posts: 886

2012 Discovery 4 3.0 SDV6 HSE Auto Baltic BlueDiscovery 4

Laughing

sure he's got better things to do. In its own way its fun. Car has been on axel stands for 3 days only so far Laughing
  
Post #186353330th Sep 2017 9:44 pm
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