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roy4matra
YaBB God
Posts: 1200
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« Reply #1 on: September 07, 2008, 11:35:53 am » |
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Handbrake not working at all on the right hand side The problem seems to be that a little wedge-shaped piece of metal that sits between the cam and the adjuster was missing... It was actually missing Peter? Not just stuck in the grease inside the rubber boot? What really annoys me though, is that the car had only done a few hundred km since the last test when I bought it so what cowboy passed it last time?
Yes, if the boot was still on and the wedge was not in there, then it could not have worked! However, please read my brake booklet, where it explains that the handbrake lever has only limited travel. If it is pulled any further then it will knock the wedge out. So the handbrake could be working one moment and suddenly fail on the next application. This is common when the caliper and/or handbrake is not adjusted correctly so it's important to get it right. Roy
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roy4matra
YaBB God
Posts: 1200
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« Reply #5 on: September 08, 2008, 08:51:53 pm » |
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o crap i did the overhaul and didnt do that last step for the selfadjustment is it possible do redo those steps afterwards or has hell broken loose? No, it's no problem. Simply back off the handbrake and disconnect it at the caliper levers. Then make sure the levers are fully off and against their stops. Now either pump the pedal hard with the engine running or drive it up and down the road and use the brakes to set the self adjuster inside the rear caliper. After it is set, you should notice (with the car jacked up and the wheels off the ground, that only a small movement of each lever forward should start applying the brake on that wheel. (the pad should be virtually touching the disc but with no pressure on it) The lever should return to its stop without any help. Do the same both sides. Now reconnect the handbrake cable and adjust so that the slack is taken up but it does not pull the levers off their stops, otherwise self adjustment cannot take place. The handbrake should now be able to hold easily without excessive force or movement. Job done. One point: If the pads are new and the discs old, and the pads are not yet bedded in, the handbrake will not be very effective until they are bedded in and might need re-adjustment at that time. Roy
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roy4matra
YaBB God
Posts: 1200
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« Reply #11 on: September 12, 2008, 09:11:15 pm » |
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Passed now! Handbrake efficiency 23% when set up as per Roy's recommendations. Tester reckoned we were a bit light on the weight though, we used 1000 kg...
Actually that is exactly the correct specified weight for a 1.6 Murena as it happens. The 2.2 is 1050 kg. However, strictly, when the car is not on the brake weight chart and not listed on the M.o.T. computer, testers are supposed to do an inertia meter road brake test, so he was wrong to guess a weight in the first place. I went through this with the authorities, at the beginning of the computerisation of the M.o.T. as we had another car that 'failed' on hand brake performance but hey had used too heavy a weight. I offered to supply all the specification weights for all Matra cars, but they insisted that as they were not listed, the only way a tester is allowed to do the test is with the inertia meter and a road brake test - no roller test. So if anyone has any problems and they have used a roller test you can point out that it is incorrect. Roy
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