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Thread: Brakes - quick identification

  1. 27th November 2011, 11:10 AM #1
    LWB123 Guest

    Brakes - quick identification

    Hello again from Brisbane (actually Johannesburg en-route to Bulawayo).

    Probably a naïve question, but can you tell what brake set up is on your truck without pulling a wheel or brake drum off?

    I have only had my 74 SWB ute for a little over a week and haven't had a chance to give it a serious lookover but know it needs a major brake overhaul. In fact, I was travelling when it was delivered here from central NSW and it is still sitting out on the street.

    Apparently it has the diffs and axles fitted from a LWB, but I don't know if that also included the 109" brakes - possibly it did. I have the option of picking up the genuine parts here in Africa (linings, springs, slave cylinders, etc) for a fairly attractive price but need to know which model brakes they are for.

    The SWB and LWB drums are different sizes which I guess could be worked out by measuring the diameter of the backing plate. The front 4 and 6 cylinder models have a diffferent arrangement for the slave clylinders - can this be detected from the backing plate?

    Finally, if the type fitted to my truck can be determined by getting under it and looking at the backing plates front and rear (a job for my son) is it likely to be complicated by Rover using different parts from different companies on the particular day that the truck or the donor was assembled?

    Or would you just wait and pull them apart and buy locally sourced components........

    Cheers,
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  2. 27th November 2011, 02:05 PM #2
    Timj
    Timj is offline Wizard Silver Subscriber
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    Hi LWB123,

    If it is not original it may be difficult to tell for sure. The 11" brakes on the front should be easy to pick as the pipe comes in to the top slave cylinder then down to the bottom one where the 10" brakes only have a single cylinder. But I am not sure if it would be easy on the back as they both only have the one slave cylinder. Also I think that there have been a few different widths of brake shoes over the years (I say think because I am not 100% certain of changes in the 11" systems) and that may also be hard to pick without pulling it apart. As I said, if you knew it was original it would be easy, also if you knew exactly what model the axles and brakes were from it should also be easy. A tape measure might get you close enough without having to pull it apart too as the differences were large enough to pick up that way I believe.

    Cheers,

    TimJ.
    Snowy - 2010 Range Rover Vogue
    Clancy - 1978 Series III SWB Game.
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  3. 27th November 2011, 02:42 PM #3
    LWB123 Guest

    Thanks

    Yes, the task would be a lot easier if I knew the origin of the brakes that are on it now - which unfortunately I don't. I bought it sight unseen over the phone and the technical side of the conversation did not extend much beyond the verbal equivalent of Clancy's 'thumbnail dipped in tar'. Having said that, its a great little truck and I don't (yet) have a lot of regret buying it the way I did.

    I'm in Africa right now and it would be too big an ask to get my teenage son to pull a front and rear wheel off and remove the drums to measure what's there or take a photo - if nothing else, the retaining screws would probably beat him. So, I figure if it could be worked out by external inspection with some confidence I would follow that lead. If it is too dicey I will leave for later.

    Cheers,
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  4. 27th November 2011, 02:49 PM #4
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    JDNSW
    JDNSW is offline RoverLord Silver Subscriber
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    As above - the 11" brakes can be easily identified in the front - two slave cylinders not one (as a check a rough measurement should indicate whether they are 10 or 12 inch - diameter is the inside of the drum, not the outside). If the space between the backing plate and the inside of the rim is the same size front and back, then the drums are the same size (10" rear and 11" front are a possibility, the reverse is very unlikely). The width of 11" brakes can be checked by looking at the backing plates (should be possible without removing a wheel). The brakes fitted to all four cylinder Series 2/2a/3 up to 1980 were 2.25" wide - the backing plate is essentially flat with the slave cylinders mounted in the same plane as the backing plate is attached to the axle. Six and eight cylinder models and all from 1980 had 3" wide brakes, and these have a raised centre so that the mounting plane for the backing plate is not the same as the mounting plane for the slave cylinders.

    John
    John

    JDNSW
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  5. 27th November 2011, 10:34 PM #5
    fc110
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    Quick check?

    Quote Originally Posted by LWB123 View Post
    Probably a naïve question, but can you tell what brake set up is on your truck without pulling a wheel or brake drum off?
    In 2As/3 all LWB have two adjusters per wheel, operating on each shoe, SWB have only one adjuster per wheel, acting on the leading shoe only(ie at the front of the backing plate). 4cyl SWB & LWB have aluminium alloy cylinders, while 6 cyl have cast iron cylinders.

    That's the quickest checks I know,
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