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Rebuilding brake drums


DavidB
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Brake drum rebuild  

20 members have voted

  1. 1. I find rebuilding brake drums easy

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Does anyone service them these days? I mean remove, clean, grease and adjust or are they treated as sealed units and allowed to fail and then become by virtue a self fulfilling prophecy.

I don’t have an issue with them, yes they certainly take a bit longer if covered in brake fluid, broken pipe end joy etc but a lot of that is no fluid changes and worn out components.

Tools are key.

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1 hour ago, bangernomics said:

Does anyone service them these days? I mean remove, clean, grease and adjust or are they treated as sealed units and allowed to fail and then become by virtue a self fulfilling prophecy.

I don’t have an issue with them, yes they certainly take a bit longer if covered in brake fluid, broken pipe end joy etc but a lot of that is no fluid changes and worn out components.

Tools are key.

I do, properly, every year, I've never had a seized brake or failure, I don't know anyone who does the same though.

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7 hours ago, bangernomics said:

Does anyone service them these days? I mean remove, clean, grease and adjust or are they treated as sealed units and allowed to fail and then become by virtue a self fulfilling prophecy.

I don’t have an issue with them, yes they certainly take a bit longer if covered in brake fluid, broken pipe end joy etc but a lot of that is no fluid changes and worn out components.

Tools are key.

I had several Mk2 Mondeo in a row so yes, every year just after it failed the test on the handbrake or the rear cylinders leaking. 

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49 minutes ago, red5 said:

'cough' 

Every 6 months. 

Prevention better then cure. Long / no inspection service intervals are a farce. 

I disagree, although our annual mileage is low, once a year is better than never :)

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54 minutes ago, bangernomics said:


Motorcycle owners eh.

Haha, never touch the bikes now as they are always new and chopped in after a couple of years, plus I don't ride in winter.

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Fuck me!!

I bought new everything including one of those spring pullers!

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that big bottom spring has to span across the two holes under the retaining bits. I need to pull it back, another person to clip it in the hole and another one to prevent my abdominal muscles from herniating into the next road.

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I know that the clearances are minimal and you may not appreciate  helpful* hints at this stage, but - take the retaining bits off, release the bottom ends of the shoes from the fulcrum and bring them outboard so they lie on the face of the fulcrum, so  closer together.  Bottom spring is now easier to fit.   Lever ends of shoes back behind fulcrum.   Refit retaining bits.   The top spring should hold the expander more or less in place meanwhile.  

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My first experience of doing drums was following a haynes book of destructions which recommended using a string tied in a loop and using that to pull the spring with your hand which would start to quickly feel like cheesewire.

Worse then car drum brakes was fixing a handbrake on an old International 855 tractor. It has a wet band brake inside the gearbox… So to do it properly means splitting the tractor in 2 halves, supporting the cab, rolling out the gearbox and rebuilding the gearbox. My shortcut* was to take the hydraulic pump assembly out the side of the gearbox to gain access inside without taking the whole tractor apart. There was just enough space to stick in a mirror, remove mirror, go in with hand wishing I had more joints in my fingers to reach round behind the layshaft and cut the pin in the band and work the band out. Then install the new band and reach the mig welder round to spot weld the pin in place.  The worst part is that the handbrake could barely hold the tractor when they were new, so hardly worth repairing in the first place.

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I don’t know if it has been mentioned, but getting the brake drum off in the first place, without mashing the backing place.

It moves freely back and forth and round and round, and can only think it is being held on by some spiritual force.

9BAC358F-3EF0-4159-8F41-41963CE3DF49.thumb.jpeg.06bba6f76e7a9450582c8af336f8c410.jpeg
 

I did get it off, at least it will …

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WTF

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They are an invention of the devil. Especially those where there is no hole in the backplate for tricking the auto* adjuster to move the shoes away from the drum, or where there IS a hole, but the adjuster is fiendishly designed to allow only outwards adjustment TOWARDS the drum through the access hole.

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26 minutes ago, bangernomics said:

It is funny the number of times I have bought cars where only one side has been done as it was leaking and the rest of the bits thrown in the boot.

It does say they’re a pita.

I bought a starlet that had all the bits in the boot for the left side and the owner saying he'd not got the chance to finish 🤔

I lost one of the springs in the garden when it slipped off the pliers 😂

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my first car, mk2 Escort, had twin leading shoe drums on the front which was brilliant fun trying to get the single acting cylinder and correct shoes for even in late 90s.   The first time I did them I asked my neighbour to borrow some decent pliers to get the springs and clips off better than the crap ones my dad had.  Instead he came around, popped all the springs and clips off for me and fecked off and left me with a big pile of bits on the floor which I had no idea where they came from 🤣

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15 hours ago, DavidB said:

2A6B4F1C-5744-4727-AA03-DA68723D1EDD.thumb.jpeg.30eec3331edafbe9dd8bc01ea313ad0a.jpeg

WTF

Brake fluid leak contaminating the shoe. The brake material backing can dissolve right off. This happened in my Mini whilst I was driving 😳

Advice before the fun of reassembling things; exercise any adjusters. Mine had all seized so the shoes and springs had to come out again!

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