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Semi-Girling brakes - Printable Version +- Austinsevenfriends (https://www.austinsevenfriends.co.uk/forum) +-- Forum: Austin Seven Friends Forum (https://www.austinsevenfriends.co.uk/forum/forumdisplay.php?fid=1) +--- Forum: Forum chat... (https://www.austinsevenfriends.co.uk/forum/forumdisplay.php?fid=14) +--- Thread: Semi-Girling brakes (/showthread.php?tid=9446) |
RE: Semi-Girling brakes - Ian Williams - 05-07-2024 I think you may have the wrong cams fitted, they are handed and different at front and rear so specific for each corner. Original's are stamped FR, FL, RR and RL RE: Semi-Girling brakes - falcott - 05-07-2024 (04-07-2024, 08:35 AM)Stumpi Wrote: I have just had a set of rear shoes relined by Saftek(posted Monday back Thursday). Mine are from Seven Workshop, with no markings at all. They are a pair, supposedly front. (04-07-2024, 09:44 AM)John Cornforth Wrote: Hi You're not the only one who is puzzled. The only thing I can think of, is that the cams are wrong. As you rightly said, the thickness of the linings shouldn't make any difference to the operation of the brakes. If this wasn't my first A7 brake rebuild I would have notice the error straight away. Ah well, we live and learn. Now I need to get new cams to replace the new cams... (04-07-2024, 11:37 AM)Ruairidh Dunford Wrote: Thank you, Geoffrey. Thanks for helping, Ruairidh. Much appreciated. RE: Semi-Girling brakes - Ruairidh Dunford - 05-07-2024 Hi Geoffrey, I only have one spare set of cams with me just now, comparing them to the ones on the car I am fairly sure they front ones. Hope this helps you to compare. Ruairidh RE: Semi-Girling brakes - Ruairidh Dunford - 05-07-2024 4CABABE9-F8B9-4623-A25F-47A214BF3FC0.jpeg (Size: 657 KB / Downloads: 181) RE: Semi-Girling brakes - John Cornforth - 05-07-2024 Hi These look more like rear cams to me. As far as I know the shaft of the rear levers should be to the rear of the backplate, slightly below the centreline with the lever facing more or less down and the cable passing underneath the axle. This places the levers roughly at right angles to the cam, so the the cotter slots will be roughly parallel to the cam. As with the fronts, the Left and Right cams will then have a different small offset from parallel. The front cams have cotter slots roughly at right angles to the cam, again with different Left and Right offsets, as I described in a previous post. The situation isn't helped by some confusing published drawings. The top left section of the Austin drawing shows this, but looks odd presumably of the drawing convention: https://archive.a7ca.org/collections/technical-drawings/item/td0010-2/ Woodrow's drawings H12 and H13 show the adjuster at the top, which is incorrect. On top of this, the backplate is held on with 4 bolts which has allowed owners to reposition them over the years ! RE: Semi-Girling brakes - Ruairidh Dunford - 05-07-2024 I attach further photos of the cams above, along with an Austin arm, the only one I have with me. They show the position of the cam and arm at rest and also fully on - I hope this helps. RE: Semi-Girling brakes - Ruairidh Dunford - 05-07-2024 On a standard factory car, the rear backplates should be orientated so that the adjuster is at the front, the brake arms should face down and backwards and the cotter nuts should be towards the centre of the car, as shown in the factory drawings above. RE: Semi-Girling brakes - falcott - 05-07-2024 In a fit of frustration (heh!) I emailed Seven Workshop. They admitted that the manufacturer has mixed up the batches, so they are sending me out some proper front ones. I guess that now I have spare cams for the rear. Thanks everyone for your help. There was only one logical conclusion in the end. RE: Semi-Girling brakes - Ruairidh Dunford - 05-07-2024 Good news. RE: Semi-Girling brakes - falcott - 22-07-2024 The correct brake cams have now arrived and have been fitted -- and things are looking good. Thanks for all your help here. Next question: How much slack may be allowed in the cable on the initial setup? Or should it be taut? Thanks. |