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Rear brake issue
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robpenrose
 


Member Since: 12 Jan 2016
Location: Surrey / SW London
Posts: 2138

United Kingdom 2010 Discovery 4 3.0 TDV6 HSE Auto Stornoway GreyDiscovery 4
Rear brake issue

Hello chaps.

Can anyone shed any light on this brake issue.

Noticed a bit of a hotter than it should be rear drivers side rear brakes.

Jacked up the car and check and it seems the handbrake was binding a bit and I thought maybe the caliper slider pins were a bit sticky.

So I took off the calliper, cleaned everything up, cleaned up the slider pins. I then wound up the handbrake knurl (handbrake off) until I couldn’t move it any further (wheel was locked on even with handbrake off) then backed it off 8 clicks. The wheel moved ok ish, but it wasn’t super easy. I didn’t adjust the little Allen key as I didn’t think you needed to for just an adjustment.

Put everything back together and went for a short slow ish drive, not really using the brakes much. After 5 mins, I pulled over to check and the area and it was hot, disk face was hot, and so was the handbrake drum. Other side was stone cold.

I’m a bit confused what’s going on. Both rear callipers were replaced by the garage about 6 months to a year ago, and the piston pushed back in easily when I took the calliper off.

Should I possibly need to back the handbrake off more than 8 clicks? I didn’t want to go too much and end up with a squealing EPB module. I also don’t know why the disk face felt hot, unless the heat was radiating up, but I’m not convinced. Any advice welcomed thanks.
 

Current: D4 HSE
Previous: BMW Z4M Coupe
Previous: Land Rover Defender 90 CSW Td5
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Post #236969526th May 2024 8:12 pm
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Admirable
 


Member Since: 19 Jul 2015
Location: Fife
Posts: 1030

Ukraine 2007 Discovery 3 TDV6 XS Auto Zermatt SilverDiscovery 3

The handbrake shoes are inside the rear drum, it sound like they need servicing/replaced/adjusted.

Have a read here https://www.disco3.co.uk/forum/rear-discs-...rake+bible
  
Post #236971527th May 2024 7:05 am
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Flapper
 


Member Since: 04 Feb 2015
Location: Gloucester
Posts: 341

United Kingdom 2005 Discovery 3 TDV6 SE Auto Zermatt SilverDiscovery 3

Change the flexy hose at the back. Not the one on the caliper the short one where the body meets the arm.
Mine had brokendown inside so it was like a one way valve
Looked fin on the outside though
  
Post #236971927th May 2024 7:54 am
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robpenrose
 


Member Since: 12 Jan 2016
Location: Surrey / SW London
Posts: 2138

United Kingdom 2010 Discovery 4 3.0 TDV6 HSE Auto Stornoway GreyDiscovery 4

Left the handbrake off last night. Took it for a drive this afternoon and all normal, disk faces were equal all around, and the handbrake drum was cold. After about 15 mins, all good.

Applied the handbrake just before home, then disengaged and by the time I got home, around 1 minute, the drum was warm and I think I could hear it dragging. So, seems to confirm park brake issue.

I’ve jacked it up again and reset to 12 clicks from locked and it seems to be working ok. I think i will need to drop it down and try again.

Is 12 clicks ok? I’ve seen 8 - 12 click range by DiscoMikey in his guide? Is there anyway to tell with an IID how far away the EPB module is from a meltdown?

Edit: is anyone able to confirm if you need to release the small Allen key for just an adjustment? The guide suggests not, but it isn’t clear. Thanks
 

Current: D4 HSE
Previous: BMW Z4M Coupe
Previous: Land Rover Defender 90 CSW Td5
Previous: Land Rover Discovery Td5 ES 
 
Post #236976127th May 2024 2:19 pm
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Bardley
 


Member Since: 02 May 2018
Location: Hertfordshire
Posts: 452

United Kingdom 2011 Discovery 4 3.0 TDV6 HSE Auto Santorini BlackDiscovery 4

The brake guide gives very good instructions about setting the handbrake shoes.
This is really important to avoid any unnecessary EPB issues.
Ideally a torque wrench is needed to set the shoes while turning the drum/disc FORWARD only at a pre determined torque setting.
Then can the wheel be clicked back to 8 clicks, AND the Allen bolt needs releasing while the the drum is tapped with a rubber mallet to allow self adjustment of a wedge. Allen bolt is then locked up.
Constant loosening of the adjustment wheel click setting to try and remedy your problem may well come and bite you.
Each drum/disc needs removing, investigating, and setting properly.
The brake Bible link has already been posted for you.
 2011 MY D4 HSE
Previously 2001 D2 TD5, 1996 D1 300Tdi, 1985 90 2.2 petrol.
Bikes! KTM, BMW, British, Classics and others.
 
 
Post #236976627th May 2024 2:42 pm
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DaveT
 


Member Since: 01 Aug 2005
Location: Cornwall
Posts: 2573

United Kingdom 2016 Discovery 4 3.0 SDV6 Landmark LE Auto Indus SilverDiscovery 4

On the back of the handbrake shoes, there is a lever which can seize. You won't know unless you actually remove the shoes. For me, this gave the same symptoms you describe Thumbs Up
 Long succession of Disco's since 2001...
SIII Lightweight - neglected & rusting. Bulkhead, A panels, vent panel & outriggers now disintegrated - Next years project! 
 
Post #236978927th May 2024 4:58 pm
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Pete K
 


Member Since: 15 Jan 2016
Location: GL
Posts: 10475

England 2005 Discovery 3 TDV6 HSE Auto Rimini RedDiscovery 3

Yeah what Dave said.

Shoes need freeing or replacing.
  
Post #236979127th May 2024 5:47 pm
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