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Thread: Wheel Cylinders

  1. 9th February 2017, 10:42 AM #1
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    mick88
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    Wheel Cylinders

    I am trying to identify which wheel cylinders are on this vehicle so that I can order new ones. The vehicle is an 88" and the brakes have obviously been upgraded from 10" to 109 11" x 2 1/4" at some time by a previous owner. It is the front wheels and the wheel cylinders are 1 1/4" dia. bore, however when I look up parts listings it states the cylinders should be the same as an 88" front cylinder. I have a spare set of 88" wheel cylinders here, but they have a 1" dia. bore. Very confusing! Any help greatly appreciated. Cheers, Mick.
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    1974 S3 88 Holden 186.
    1971 S2A 88
    1971 S2A 109 6 cyl. tray back.
    1964 S2A 88 "Starfire Four" engine!
    1972 S3 88 x 2
    1959 S2 88 ARN 111-014
    1959 S2 88 ARN 111-556
    1988 Perentie 110 FFR ARN 48-728 steering now KLR PAS!
    REMLR 88
    1969 BSA Bantam B175
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  2. 9th February 2017, 05:09 PM #2
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    I thought 109" fronts were twin-leading shoe ?


    Colin
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  3. 9th February 2017, 06:31 PM #3
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    Hey Mick, looks like someone has fitted 11" rear brakes to the fronts. Fronts are twin leading shoe like grommit says.

    Cheers Rod
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  4. 9th February 2017, 08:43 PM #4
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    Cylinders

    Hello from Surabaya.

    I understand that both the 4 and 6 cylinder engine 109" models have twin leading shoes as suggested. However, I also believe the 6 cylinder set up has wider shoes (3") and different wheel cylinders to the 4 cylinder models. The 2.5" wide set up, if they were front brakes originally, is presumably from a 4 cylinder 109".

    Cheers,

    Neil
    1975 S3 88" - Ratel
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  5. 9th February 2017, 09:32 PM #5
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    Quote Originally Posted by 67hardtop View Post
    Hey Mick, looks like someone has fitted 11" rear brakes to the fronts. Fronts are twin leading shoe like grommit says.

    Cheers Rod




    Thanks Rod,
    that throws some light on it, the same setup as an 88", only larger diameter and wider shoes!
    Cheers, Mick.
    1974 S3 88 Holden 186.
    1971 S2A 88
    1971 S2A 109 6 cyl. tray back.
    1964 S2A 88 "Starfire Four" engine!
    1972 S3 88 x 2
    1959 S2 88 ARN 111-014
    1959 S2 88 ARN 111-556
    1988 Perentie 110 FFR ARN 48-728 steering now KLR PAS!
    REMLR 88
    1969 BSA Bantam B175
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  6. 9th February 2017, 09:38 PM #6
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    Quote Originally Posted by mick88 View Post
    Thanks Rod,
    that throws some light on it, the same setup as an 88", only larger diameter and wider shoes!
    Cheers, Mick.
    Yes that looks to be the case Mick. Thats 1 problem solvered.

    Cheers Rod
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  7. 9th February 2017, 09:42 PM #7
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    Quote Originally Posted by S3ute View Post
    Hello from Surabaya.

    I understand that both the 4 and 6 cylinder engine 109" models have twin leading shoes as suggested. However, I also believe the 6 cylinder set up has wider shoes (3") and different wheel cylinders to the 4 cylinder models. The 2.5" wide set up, if they were front brakes originally, is presumably from a 4 cylinder 109".

    Cheers,

    Neil
    Hi S3ute, the 4 and 6 cyl and indeed the v8 stage1, 109's drum brakes all used the same wheel cylinders on the front. Its the backing plates that are different as well as the width of the shoes and drums. Also the 6 and v8 usually had a brake booster.

    Cheers Rod
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  8. 10th February 2017, 05:56 AM #8
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    Quote Originally Posted by 67hardtop View Post

    Hi S3ute, the 4 and 6 cyl and indeed the v8 stage1, 109's drum brakes and the 101 all used the same wheel cylinders on the front. Its the backing plates that are different as well as the width of the shoes and drums. Also the 6 and v8 usually had a brake booster.

    Cheers Rod
    Fixed it for you.
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  9. 10th February 2017, 08:53 AM #9
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    Thanks

    Quote Originally Posted by 67hardtop View Post

    Hi S3ute, the 4 and 6 cyl and indeed the v8 stage1, 109's drum brakes all used the same wheel cylinders on the front. Its the backing plates that are different as well as the width of the shoes and drums. Also the 6 and v8 usually had a brake booster.

    Cheers Rod
    Hello again and thanks for the clarification.

    Yes, I knew that the backing plates, drums and shoes were different between the 6 and 4 cylinder 109" models - I have the 6 cylinder model brakes with the booster on my 88"". I had some how managed to get it in my head that the wheel cylinders might have been different too, but apparently not so.

    Cheers,

    Neil
    1975 S3 88" - Ratel
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  10. 10th February 2017, 09:07 AM #10
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    Quote Originally Posted by S3ute View Post
    Hello again and thanks for the clarification.

    Yes, I knew that the backing plates, drums and shoes were different between the 6 and 4 cylinder 109" models - I have the 6 cylinder model brakes with the booster on my 88"". I had some how managed to get it in my head that the wheel cylinders might have been different too, but apparently not so.

    Cheers,

    Neil


    Neil, what you have in your head may be correct, as the ones I have are 1.250" dia. bores and the 88 wheel cylinders only have a 1.000" bore. On further investigation, I have a series 3 six cylinder one tonne wreck here, and it appears to have the larger bore rear wheel cylinders.


    Cheers, Mick.
    1974 S3 88 Holden 186.
    1971 S2A 88
    1971 S2A 109 6 cyl. tray back.
    1964 S2A 88 "Starfire Four" engine!
    1972 S3 88 x 2
    1959 S2 88 ARN 111-014
    1959 S2 88 ARN 111-556
    1988 Perentie 110 FFR ARN 48-728 steering now KLR PAS!
    REMLR 88
    1969 BSA Bantam B175
    Reply With Quote Reply With Quote
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