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norton

mk4 rear brakes

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Posted (edited)
1 hour ago, sheffieldcortinacentre said:

Collapsed brake hose acting like a non return valve , is a common fault on vehicles the see in frequent use.

That’s an easy fix then, entirely logical…. the rear I assume if it’s not a stupid thing to say.   There’s only one at the rear iirc? 

Edited by norton

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Yes.

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13 hours ago, norton said:

That’s an easy fix then, entirely logical…. the rear I assume if it’s not a stupid thing to say.   There’s only one at the rear iirc? 

Fit stainless flexies all round .

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5 hours ago, markymarkthree said:

Fit stainless flexies all round .

would have been a good idea, except i ordered this morning.  

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22 hours ago, norton said:

would have been a good idea, except i ordered this morning.  

and delivered within hours.... all prepared to do the job...never changed one beofre but i assume it's striaght forward. I love these ramps, just right for arthritic old guys. mk4-jacked.jpg

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new pipe is in and bled, just back from a satisfactory road test, in fact the pedal feels a whole lot better now, much as id expect it to be. Could it be the back pipe was more or less blocked for ages, causing that hard pedal? ive a feeling that must have been the case,

 

Quite happy now except for the handbrake, which despite many turns on the adjuster, wont quite hold the car on my (very steep) drive.

 

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Probably, the shoes need adjusting rather than cable but the ratchet type on 8 in brakes was never great.

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What adjustment is there on the shoes? You surprised me with that one…   I can live with a weak handbrake anyway, as rarely will I need it on a slope as steep as my drive… 

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There's a ratchet mechanism on one shoe that's supposed to take the slack up, but they wear & slip out of adjustment the mechanism has been obsolete since the late 80's.

The other common problem is the handbrake cable pulling through the back plates hard to spot as when released it comes back out & looks ok.

Easily fixed with a washer on the outside of plate to reduce hole back to original size.

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12 hours ago, sheffieldcortinacentre said:

There's a ratchet mechanism on one shoe that's supposed to take the slack up, but they wear & slip out of adjustment the mechanism has been obsolete since the late 80's.

The other common problem is the handbrake cable pulling through the back plates hard to spot as when released it comes back out & looks ok.

Easily fixed with a washer on the outside of plate to reduce hole back to original size.

Thanks for that, I’ll watch out for it. 

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On 4/12/2025 at 8:00 PM, sheffieldcortinacentre said:

There's a ratchet mechanism on one shoe that's supposed to take the slack up, but they wear & slip out of adjustment the mechanism has been obsolete since the late 80's.

The other common problem is the handbrake cable pulling through the back plates hard to spot as when released it comes back out & looks ok.

Easily fixed with a washer on the outside of plate to reduce hole back to original size.

Got y brain in gear now, hopefully I’ll be able to movetherachetalong manually…will have a look tomorrow 

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Posted (edited)

the plugers on the backplate dont move when pressed but you can freely pull them out...should they not be in the out position and firm?

 

 

Edited by norton

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14 minutes ago, norton said:

the plugers on the backplate dont move when pressed but you can freely pull them out...should they not be in the out position and firm?

 

If you mean the pistons on the cylinders then yes they should move outwards when brake peddle is pressed and force the shoes apart.  In their "resting position" the pistons should be in contact with the shoe, there shouldn't be a gap.

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I think he meens the ones at bottom rear of back plt.

I can't remember ,it shows you in manual though.

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Posted (edited)

yeah Craig has it, that's what I mean.... i dont suppose they do very much after 40 odd years. Haynes manual is a bit vague.

 

Anyway, i checked everything out and it all looks OK, so maybe just needs a touch more adjustment. it works fine of a less severe slope but wont hold on my steep drive.

one cylinder is leaking so i'll replace that before making further adjustments.

Edited by norton

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