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Thread: A little advice needed - Not Vec/Signm

  1. #1
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    Default A little advice needed - Not Vec/Signm

    Evening all,

    I'm working on a punto at the moment....

    I've discovered the rear brakes arnt performing as they should, I've taken off the drum and my lack of knowledge means I dont know if they are worn shoes, or scored or just not adjusted enough... any help?





    I'ts been 15 years since I last did brake shoes and drums, and it took me ages to remember the order of taking apart and fitting back together.

    here's a shot of the removed setup - refitted back in to the drum -



    and the hub -



    Checked the fluid - its at the max mark. Could it be the bit at the top of the hub (cylinder??) - should I see a dramatic movement when the brake is depressed?

    But that doesnt explain how both handbrake and normal braking were not adequate in the rear.

    Any advice welcomed..

  2. #2
    Regular Member pogo's Avatar
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    Vehicle : Insignia

    Trim : Sri

    Engine : 2.0 turbo petrol

    Year : 2010

    Default

    if they are anything like old vauxhall drums and they look quite similar to me there should be a n adjustment nut at the top of the shoes between the two opposing shoes although i cant make it out in the pidctures, do the cylinders move freely as they can stick . to adjust the shoes and assuming the adjuster is there, all you do is turn it to tighten or spread the shoes, then try the drum back on you should be able to slip the drum over the shoes with minimal obstruction. this should hopefully help mate although in my opiniojn dont take risks with brakes get them renewed if your in doubt

  3. #3
    Ex Vec-C Admin ed taylor's Avatar
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    Vehicle : Vectra Estate

    Trim : Elite

    Engine : 3.2 V6

    Year : 04

    Mileage : 55000

    Default

    There looks plenty of meat to me. there looks like there is an adjuster on the right hand side, third photo, with the blue spring on it is a ratchet and pawl, if you flick the pawl with a screw driver it will move the ratchet, either by one or two teeth at a time [practice will show you how] or it will compleatly realease the shoe tention, when you have got the knack of "flicking" the pawl [ the smaller one with the blue spring on], then put the brakes back on the car, "flick" the pawl so that the drum goes on, this is the tricky bit, if it is loose then you have to keep on" flicking the pawl" if you over flick it the drum will not go on then you need to realease the pawl and start again, i hope it does not sound too complicated, it is quite easy, if you need more help pm me and i will give you my phone number and explain in more detail.
    Last edited by ed taylor; 12th June 2006 at 21:01.

  4. #4
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    Default

    With the help of Gary3306 - and a quick call (cheers guys)

    I have scuffed the brake surfaces, and had a nightmare refitting it all - its amazing how much easier they come apart than go back together - I couldnt get one of the springs on as I'd had the self adjuster set to the furthest away point - preventing the spring reaching.

    So - finally - 1 side was all back together -

    tried the brake - and its leaking fluid now!! - I must have nicked the rubber seal on the cylinder!! ******.

    So - now will be replacing the cylinder in the morning as well

  5. #5
    Ex Vec-C Admin & Founder GARY3306's Avatar
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    Default

    Quote Originally Posted by kitchpoo
    With the help of Gary3306 - and a quick call (cheers guys)

    I have scuffed the brake surfaces, and had a nightmare refitting it all - its amazing how much easier they come apart than go back together - I couldnt get one of the springs on as I'd had the self adjuster set to the furthest away point - preventing the spring reaching.

    So - finally - 1 side was all back together -

    tried the brake - and its leaking fluid now!! - I must have nicked the rubber seal on the cylinder!! ******.

    So - now will be replacing the cylinder in the morning as well
    That rubber seal on the outside of either end of the cylinder is just a dust cover, the actual piston seals stop the fluid leaking, therefore if you pull them dust covers off their seat (or put a hole in one in your case LOL ) and fluid runs out, then you know the seals are gone. To make bleeding easier, use a hose clamp to clamp the flexi hose to that cylinder. Change the cylinder and then tighten all fittings. Prepare to bleed the cylinder getting everything ready (ie, bleed hose and bottle in place etc) then slacken the bleed nipple half a turn. Have someone in the drivers seat and get them to hold down the brake pedal, when they have the pressure on, slacken off the hose clamp, they will feel the pedal fall away, and then just continue to bleed in the normal way. By using this method, you are only really bleeding that small length of pipe from where you clamped it to the cylinder. Makes life a lot simpler. HTH, good luck and if you need any more help, you have my number.
    [SIGPIC]VX<font color=Red>R</font> with added Courtenay <img src=https://www.vectra-c.com/forum/images/smilies/biggrin.png border=0 alt= title=Big Grin class=inlineimg />

  6. #6
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    Default

    Sleeping on it... could I have over set the shoes too far out - then applied the brake (which I did once by mistake without the drum back on) - causing the pistons to come too far out of the cylinder?

    I hate doing brakes!

  7. #7
    Regular Member ion's Avatar
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    I bought a bleed kit a while back, it uses pressure off the spare wheel. Very useful, it bleeds in seconds. You can use it to flush the entire system as well.

    Get some copper grease & apply small amounts carefully to the moving parts.

    If one cylinder has gone, the other might be suspect, while doing the job I'd swap both (I did this on my old cav) as cr@p can build up inside the cylinder, restricting the movement of the piston, which may have contributed to the problem. When doing brakes I always do work in pairs, you do not want one pulling more than the other.

    The cylinders can be an @rse to get off, I had to renew the brake lines onto them as well as they were impossible to get off.

    HTH,

    Ian

  8. #8
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    hmm - OK - I'll try and get the cylinders off today at some point....
    shopping list....

    2x rear cylinders
    1 x copper slip
    1 x DOT 3 brake fluid
    1x Brake bleeding kit
    hose clamp

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    Regular Member AndrewTi's Avatar
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    Don't forget plasters.

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    and a swear filter

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