Huggs153
Member Since: 15 Nov 2012
Location: Surrey
Posts: 190
  
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| Rear Right brake sticking |
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Hi Guys n Girls,
I am having issues with the rear right brake sticking and generating massive heat buildup. I have replaced the caliper guide slider pin but no change. I have cleaned the piston after extending it 1/4 inch and recompressing, again no change. How does the pressure release once your foot is taken off the brake pedal? TIA Huggs.
D4 XS
D3 HSE(SOLD)
side steps, EGR blanked,3 flash +Clock Move
D4 XS 2012 For sale
D4 HSE 2015
V8 Upgrade Front brakes (AF)
155000 mile+ club
RAI
16000 lb winch
D4 As it comes...
Hampshire & Berkshire 4X4 Responder
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 28th Jun 2018 1:16 pm |
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Gareth
Site Moderator
Member Since: 07 Dec 2004
Location: Bramhall
Posts: 26701
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When you release the brake pedal, the piston in the calliper will stop pushing on the pad. There is no return spring as such, but the slight elasticity in the piston seal is usually enough to release pressure on the pad.
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| 28th Jun 2018 1:27 pm |
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philm
Member Since: 02 Oct 2016
Location: Manchester
Posts: 732
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| Re: Rear Right brake sticking |
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Huggs153 wrote:Hi Guys n Girls,
I am having issues with the rear right brake sticking and generating massive heat buildup. I have replaced the caliper guide slider pin but no change. I have cleaned the piston after extending it 1/4 inch and recompressing, again no change. How does the pressure release once your foot is taken off the brake pedal? TIA
Had this happen on a car, it was the brake hose, it had collapsed inside causing it to act like a one way valve. L633 Defender
Range Rover Velar-gone
Discovery 4 Landmark-gone
Gap IID Tool
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| 28th Jun 2018 2:48 pm |
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Pete K
Member Since: 15 Jan 2016
Location: GL
Posts: 10363
 
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but we know calipers on the rear of D3 and known to be sticky
new ones are from £40 on ebay
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| 28th Jun 2018 5:40 pm |
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L319
Member Since: 14 Dec 2013
Location: Herefordshire
Posts: 2080
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Gareth wrote:When you release the brake pedal, the piston in the calliper will stop pushing on the pad. There is no return spring as such, but the slight elasticity in the piston seal is usually enough to release pressure on the pad.
The seals are designed to give just the right amount roll back to take the pressure off the pads. Any sticking of the piston will negate that action.
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| 28th Jun 2018 10:36 pm |
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Huggs153
Member Since: 15 Nov 2012
Location: Surrey
Posts: 190
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Update, I removed the disc and dusted out the EPB stuff in there, pushed the piston right back in again and checked the rubber seal, all good. Fitted new pads and will now take it for a run out... Huggs.
D4 XS
D3 HSE(SOLD)
side steps, EGR blanked,3 flash +Clock Move
D4 XS 2012 For sale
D4 HSE 2015
V8 Upgrade Front brakes (AF)
155000 mile+ club
RAI
16000 lb winch
D4 As it comes...
Hampshire & Berkshire 4X4 Responder
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| 29th Jun 2018 11:16 am |
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Dartanjang
Member Since: 20 Dec 2014
Location: Mountain Strokes
Posts: 77
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I recently changed discs and pads. First the rear right and then the rear left caliper started to bind. I tried to clean, lube, polish, exercise, you name it. But in the end, new calipers has been the answer. It seems that when the pistons are retracted far back in the caliper that some residue within the caliper cavity restricts piston motion. Surely somebody with lots of patience and skill could disassemble the caliper and renovate it. But for me, wheighing effort and cost together, the most rational solution was new calipers.
And it solved my problem. The brakes have worked perfect since.
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| 29th Jun 2018 11:47 am |
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Ja92mie
Member Since: 16 Sep 2014
Location: Newquay
Posts: 1259
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I have just had both my rear Calipers changed due to both sticking badly. Much better now!
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| 29th Jun 2018 11:56 am |
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Huggs153
Member Since: 15 Nov 2012
Location: Surrey
Posts: 190
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Cheers Dartanjang, but as an Ex Royal Engineer i feel i should be able to service them and as you said the final steps are to swap out the calipers... while i have time on my hands and the "Honey Do"list is short ill keep working on them... Huggs.
D4 XS
D3 HSE(SOLD)
side steps, EGR blanked,3 flash +Clock Move
D4 XS 2012 For sale
D4 HSE 2015
V8 Upgrade Front brakes (AF)
155000 mile+ club
RAI
16000 lb winch
D4 As it comes...
Hampshire & Berkshire 4X4 Responder
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| 29th Jun 2018 11:57 am |
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Dartanjang
Member Since: 20 Dec 2014
Location: Mountain Strokes
Posts: 77
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 Funny that you would say that. I have exactly the same background. And to be honest, I bought two sets of seal kits for the rear calipers when I bought the discs and pads. So there was an inital idea to also do it myself. But then reality caught up and stole away all the spare time (creepy how that happens) and I gave in to the easy but a little more expensive solution.
Have fun! I envy you a bit as the rewarding feeling when it's back in good shape is really nice.
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| 29th Jun 2018 12:39 pm |
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Pete K
Member Since: 15 Jan 2016
Location: GL
Posts: 10363
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many people think they can service them.
But 6 months later, they say F$ck it. And buy new ones
I can tell you a new seal and piston does not work in the long run!
However, if you are an engineer, just behind the seal is a deep groove.
If you use a sharp tool to clear all the rubbish/dirt out, you might find it sorts it for free!
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| 29th Jun 2018 5:35 pm |
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Browny90
Member Since: 19 Jul 2016
Location: Ashbourne
Posts: 687
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Dartanjang wrote: Funny that you would say that. I have exactly the same background. And to be honest, I bought two sets of seal kits for the rear calipers when I bought the discs and pads. So there was an inital idea to also do it myself. But then reality caught up and stole away all the spare time (creepy how that happens) and I gave in to the easy but a little more expensive solution.
Have fun! I envy you a bit as the rewarding feeling when it's back in good shape is really nice.
I thought RE just built/ blew up bridges? 
As REME is my obligation to take the p  s   Disco4 MY16 SDV6 Landmark Black
Disco4 MY12 SDV6 XS Orkney Grey (Gone)
Defender 90 200tdi Completely rebuilt.
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| 31st Jul 2018 11:47 am |
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Browny90
Member Since: 19 Jul 2016
Location: Ashbourne
Posts: 687
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Personally I would buy 2 new callipers & leave them in the box..
Strip a calliper, if you see an obvious issue then see if you can rectify it easily, if so then great, either send the callipers back or keep the min the garage until they stick again.
If you strip it can cant see anything jumping out at you, or if you break something, you have a new calliper waiting for you. Disco4 MY16 SDV6 Landmark Black
Disco4 MY12 SDV6 XS Orkney Grey (Gone)
Defender 90 200tdi Completely rebuilt.
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| 31st Jul 2018 11:49 am |
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Pete K
Member Since: 15 Jan 2016
Location: GL
Posts: 10363
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with the price of them, you may as well stick them on the car. Little point keeping them 'in stock'.
You can play with the old ones and try and refurb
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| 31st Jul 2018 12:13 pm |
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