Rear Brakes - electronic handbrake

TAH · Jan 9, 2013

Hi all
I've just go some new pads, calipers (ones on it are binding) and discs/rotors for my RR and was going to put it into a garage to have them done quickly.
They want over 300 notes though - and say "oo you need to disable the electronic handbrake to get the rear discs off"
really?
Do I need special software? Can I just back the Handbrake off?
How hard is changing the rear discs (plenty handy enough with spanners, just didn't have the time but for 300 I will find it!)

2.0_hippo · Jan 9, 2013

I don't understand why you need to disable the electronic hand brake ?
Can't you just leave the handbrake off whilst doing the pads etc...

2.0_hippo · Jan 9, 2013

What year is your l322 ?

TAH · Jan 9, 2013

yeah kinda what I am asking. - if I leave it off does it just stay off (i.e. safe to pull the rear discs off? )

2006 year

Richy-2011 · Jan 9, 2013

My d3 has the same issues can change the front but the back has to b plugged in to computer to wind the pistons in

RS2000CUSTOM · Jan 9, 2013

Electric parkbrakes require the piston to be "wound back" (normally by a computer) because if you only "leave the parkbrake off" the piston only moves back a fraction of a nats cock to move the pad away from the disc enough not to cause it to bind

When removing worn out pads the piston is now further out the caliper so impossible to fit new thicker pads without "winding back" the piston into the caliper.

Leccy park brakes in the majority have a caliper that is servo operated to put the park brake on and need a computer to wind back - some have a remote motor that operates the park brake cables and this system can be "wound back" using an old skool wind back tool

Hope this helps !

RS2000CUSTOM · Jan 9, 2013

Ooooooo pretty pictures !

Electric Caliper

Manual Caliper

wil2813 · Jan 9, 2013

RS2000CUSTOM said:
Electric parkbrakes require the piston to be "wound back" (normally by a computer) because if you only "leave the parkbrake off" the piston only moves back a fraction of a nats cock to move the pad away from the disc enough not to cause it to bind

When removing worn out pads the piston is now further out the caliper so impossible to fit new thicker pads without "winding back" the piston into the caliper.

Leccy park brakes in the majority have a caliper that is servo operated to put the park brake on and need a computer to wind back - some have a remote motor that operates the park brake cables and this system can be "wound back" using an old skool wind back tool

Hope this helps !

+1 but maybe quote "nats penis"

owl · Jan 9, 2013

There is a bung in the brake disc, take it out and turn the disc until you can see the adjuster you can then back the adjuster off with a flat blade screw driver, remove brake caliper and carrier then the disc retaining screw and the disc will now come off. now you can service the hand brake. refit the disc adjust the adjuster up until the disc won't turn and back of 8/10 clicks then rotate the disc until you can access the cable adjusting screw through the same access hole in the disc undo it half a turn tap the disc and re-tighten.
if you want to change the shoes you should use a pc to drive the hand brake cables to the mounting position

RS2000CUSTOM · Jan 9, 2013

If your vehicle has "inboard rear shoes" then owls method should sort the job out

TAH · Jan 9, 2013

Thanks all. This is a 2006 range rover so has the shoes in the drum ( 99% sure as not had the backs off )
To clarify I'm not changing the park brake shoes. Just the main pads and disc
So my question related to getting the disc off without the need for a computer to wind the park brake in
I'll just back it off manually if it causes me an issue as per other vehicles - just wasn't sure about this electric park brake thingy. Doesn't sound like its an issue when changing discs only. Ta

rewmer · Jan 9, 2013

I don't know about the l322 but the sports are really twitchy about discs and shoes. There are procedures that have to be followed when changing disc starting with mounting the park brake. I believe this can be done with a combination of key turns and brake lever releases but I'm going from memory. Worst case is you will find yourself with a bi ding drum, over heat and seize. Look into it carefully.

owl · Jan 9, 2013

rewmer said:
I don't know about the l322 but the sports are really twitchy about discs and shoes. There are procedures that have to be followed when changing disc starting with mounting the park brake. I believe this can be done with a combination of key turns and brake lever releases but I'm going from memory. Worst case is you will find yourself with a bi ding drum, over heat and seize. Look into it carefully.

The key turn, brake pedal presses and hand brake switch opperations are to put the hand brake into bedding in mode so you can apply the hand brake whilst driving without the service brakes coming on.

Rear Brakes - electronic handbrake

TAH

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2.0_hippo

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2.0_hippo

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TAH

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Richy-2011

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RS2000CUSTOM

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RS2000CUSTOM

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wil2813

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owl

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RS2000CUSTOM

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TAH

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rewmer

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owl

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