Technical  Failed MOT

Currently reading:
Technical  Failed MOT

Re understanding the brake adjusters, first take photos of them both sides so you know to refit correctly. Also if you fit new I think you will find they are handed. Many years ago I bought a Citroen from a dodgy car salesman who was reluctant to let me roadtest before purchase due to dodgy brakes, I insisted and agreed brakes poor, thereby further negotiating a better price having satisfied myself nothing major, when I got it home and stripped down I found brand new brake shoes had been fitted etc. and the cause of the poor foot and handbrake was they had fitted the left hand adjuster on the right hand side so stopping them from working.:)
Note the ends of the self adjusters are different lengths , so check you fit correctly.
Incidentally if with handbrake cables backed off if both brake drums turn freely and assuming brake pedal travel was good, it may be possible to leave shoes assembled and using a screwdriver to activate the handbrake lever and jam it away from the shoe so that it is possible to release the end of the cable from the lever and then tap the outer from it's location in the back plate allowing the new handbrake cable to be threaded through the back plate and engage with the brake shoe lever then remove the screwdriver that is jamming it out, once you are happy it is located correctly then push the outer cable fully in to it's location in the back plate. Several screwdrivers and long nose pliers often come in handy.:)
I do this all assembled but I know some find it easier with hub removed, but why over complicate.
I think photo below is similar to yours, once you understand how they operate, make sure the threaded section will move freely. The idea is that as the shoe wears that operation of the foot or handbrake should move the brakes shoes out a little pulling on the small spring attached to the shoe and adjuster pulling it and allowing the adjuster ratchet to click up enough to adjust without binding. From your point of view I would suggest assembling and then sliding brake drum on and working foot and handbrake to allow the self adjusting side to do the job. Me personally having done many, I use a long nose pair of pliers to manually adjust testing now and again until happy the drum slides on correctly. The danger of this if not familar is over adjusting so drum jams or causing damage to self adjusters, so best stick with plan A.;)
 

Attachments

  • 1768403417862.png
    1768403417862.png
    490.8 KB · Views: 20
Last edited:
There's some info right here and here. Grab it before it goes away

CLEARANCE RECOVERY SELF-ADJUSTING DEVICE BETWEEN SHOES AND DRUM​

The adjustment of the clearance between the shoes and the drums takes place automatically and continuously, as required, every time the brakes are applied by means of the self-adjustment device.

The device comprises the rod (1) inside which the adjustment screw (2), to which the toothed ring nut (3) is bolted, slides freely.

In the rest position, the front shoe return spring (6) keeps the device compressed and, as a result, the ring nut (3) pushes the square plate (4) in contact with the end of the rod (1).

The square plate (4) is also subject to a thrust force from the flexible spring (5). When the brakes are operated the two shoes move apart and come into contact with the drum; the two ends of the device are kept in contact with the shoes through the springs (7) and (8).

The square plate (4), thrust by the flexible spring (5), reacts with the toothed ring nut (3) and causes it to rotate by means of the clip (9) in permanent contact with the toothed ring nut.

During braking the toothed ring nut is no longer subject to the thrust action of the flexible spring and, as a result, the clip is at the same angle as the ring nut tooth which is free to slide with the adjustment screw on the clip without recovering the clearance due to the expansion of the drum.

In the case of overhauling before fitting the brake linings, the toothed ring nut must be placed in contact with the spring and loosened by half a turn.

Also, there's a tool available (see also here)

Since my car has disk brakes, I've got no idea how to use that tool ;-)

Anyway, since you're already "in there", why not fit new brake shoes
 
This post contains eBay links which may earn a commission at no additional cost to you.
Last edited:
There's some info right here and here. Grab it before it goes away





Also, there's a tool available (see also here)

Since my car has disk brakes, I've got no idea how to use that tool ;-)

Anyway, since you're already "in there", why not fit new brake shoes

Tool is to hold brake pistons in cylinder when shoes removed
 
This post contains eBay links which may earn a commission at no additional cost to you.
The danger of this if not familar is over adjusting so drum jams or causing damage to self adjusters, so best stick with plan A.;)
The best way is to start with it at minimum length and on the first press of the pedal they will self-adapt just right. Install them both, then press the pedal.
Only after that, do tension the hand brake cables at proper tension and they'll work fine.
 
The best way is to start with it at minimum length and on the first press of the pedal they will self-adapt just right. Install them both, then press the pedal.
Only after that, do tension the hand brake cables at proper tension and they'll work fine.

Hi Mike,
Sorry to disagree but very often adjusters do not work at all if fitted at minimum length there is just too much free play and not enough resistance to the adjustment nut . The nut can just move back and forth .
Yes to having cables completely loose then manually turn adjustment nut so drum can just fitted only then use foot brake to operate self adjusters to set final adjustment . Only after that adjust cable to take up free play without moving shoe lever off its stop position.
 
Last edited:
Check shoes same brand / type both sides
Check pistons move freely , gently push in with screw driver one piston at a time only a few mm
Brush dust away shoes , back plate
using clean paint brush
File inner lip caused by wear off drums, dont switch drums side to side

I previously wrote looks like self adjuster lh not working-that prob wrong as drum tight to remove, i was fooled by grossly tighten cable

Check both self adjusters working-sounds like rh drum too easy too remove
I'll have a look tomorrow, test and give everything a good clean. I have some brake cleaner and assume that can go anywhere in the drum?

When i opened the drums a lot of dust fell on the floor so there is quite a lot of muck to clean away.
 
I'll have a look tomorrow, test and give everything a good clean. I have some brake cleaner and assume that can go anywhere in the drum?

When i opened the drums a lot of dust fell on the floor so there is quite a lot of muck to clean away.

Dont use brake cleaner on any rubber parts
 
Incidentally if with handbrake cables backed off if both brake drums turn freely and assuming brake pedal travel was good, it may be possible to leave shoes assembled and using a screwdriver to activate the handbrake lever and jam it away from the shoe so that it is possible to release the end of the cable from the lever and then tap the outer from it's location in the back plate allowing the new handbrake cable to be threaded through the back plate and engage with the brake shoe lever then remove the screwdriver that is jamming it out, once you are happy it is located correctly then push the outer cable fully in to it's location in the back plate. Several screwdrivers and long nose pliers often come in handy. I do this all assembled but I know some find it easier with hub removed, but why over complicate.

I'm going to give this a try. I think i could have a lot of problems taking the brakes apart and putting them back together. The MOT fail was for handbrake so if i can leave everything together i will (Assuming after testing the parts and mechanism check out).

I think photo below is similar to yours, once you understand how they operate, make sure the threaded section will move freely. The idea is that as the shoe wears that operation of the foot or handbrake should move the brakes shoes out a little pulling on the small spring attached to the shoe and adjuster pulling it and allowing the adjuster ratchet to click up enough to adjust without binding. From your point of view I would suggest assembling and then sliding brake drum on and working foot and handbrake to allow the self adjusting side to do the job. Me personally having done many, I use a long nose pair of pliers to manually adjust testing now and again until happy the drum slides on correctly. The danger of this if not familar is over adjusting so drum jams or causing damage to self adjusters, so best stick with plan A.;)

(y) I can't remember how many of these i've already broken..its a few lol
 
There's some info right here and here. Grab it before it goes away

Also, there's a tool available (see also here)

Since my car has disk brakes, I've got no idea how to use that tool ;-)

Anyway, since you're already "in there", why not fit new brake shoes

I've already had a read and downloaded the pages. I'm interested in the tool that could make life easier, drum brakes be the stuff of nightmares though so i'm going to try to leave them alone.
 
This post contains eBay links which may earn a commission at no additional cost to you.
I've already had a read and downloaded the pages. I'm interested in the tool that could make life easier, drum brakes be the stuff of nightmares though so i'm going to try to leave them alone.
Just take your time and a few photos, don't worry, there will always be some here to take the pi**, sorry I mean help you.;););)
 
Put drum on side you not adjusting.
Press pedal slightly to slightly push pistons out then turn adjuster nut (push top of nut toward back plate to reduce clearance) this makes it much easier to turn adjuster nut and so less likely to damage anything. Do this until drum drags slightly when pushing over shoes.
Then do
Other side.
Then take drums off and adjust cables to take out slack without move shoe levers off stops
 
Put drum on side you not adjusting.
Press pedal slightly to slightly push pistons out then turn adjuster nut (push top of nut toward back plate to reduce clearance) this makes it much easier to turn adjuster nut and so less likely to damage anything. Do this until drum drags slightly when pushing over shoes.
Easy for us to say, but I have seen many where the pedal is pushed and both pistons pop out leaking fluid everywhere.;););)
 
I've already had a read and downloaded the pages. I'm interested in the tool that could make life easier, drum brakes be the stuff of nightmares though so i'm going to try to leave them alone.
No tool to make your job easier
 
Hi Mike,
Sorry to disagree but very often adjusters do not work at all if fitted at minimum length there is just too much free play and not enough resistance to the adjustment nut . The nut can just move back and forth .
Yes to having cables completely loose then manually turn adjustment nut so drum can just fitted only then use foot brake to operate self adjusters to set final adjustment . Only after that adjust cable to take up free play without moving shoe lever off its stop position.
Ok. So not at minimum length if that doesn't work but definitely is better to have them lower than they will settle. So, adapt yourself, the man fitting them, so in the end to be perfect fitted.
I did mine at minimum length and that worked great, but that is on brake system without ABS.
Thank you for pointing that out!
 
Back
Top