1 00:00:09,041 --> 00:00:11,083 OK. So for reassembling 2 00:00:11,083 --> 00:00:16,250 the brakes, if it was an old set, that Piston will move forward to take up the clearance 3 00:00:16,541 --> 00:00:20,083 and we then need to push it back to replace it with new pads. 4 00:00:20,541 --> 00:00:23,375 OK. Hence the reason for taking the top off the reservoir. 5 00:00:23,875 --> 00:00:26,750 So on this occasion, we don't need to really force it back, 6 00:00:26,875 --> 00:00:31,250 but I'm going to show you how to use a caliper rewind tool. 7 00:00:31,250 --> 00:00:33,458 So then we can kind of run through the system. 8 00:00:33,833 --> 00:00:37,000 So if we put the tool through there, 9 00:00:37,000 --> 00:00:38,541 put it in and then we can just gently wind. 10 00:00:38,541 --> 00:00:41,500 It should only need hand pressure. if it's really tight. 11 00:00:41,791 --> 00:00:44,708 I'd be checking the piston to see if it's corroded or damaged, 12 00:00:45,625 --> 00:00:49,750 and we just wind the tool back in gently and you can already see the piston moving on its own. 13 00:00:51,750 --> 00:00:53,500 That's fully retracted now, 14 00:00:53,500 --> 00:00:55,208 so we can remove the tool. 15 00:00:58,083 --> 00:01:00,666 Just give the surfaces wipe over where you pushed it back in. 16 00:01:01,208 --> 00:01:03,916 And now we can refit the pads themselves. 17 00:01:04,458 --> 00:01:07,125 OK, we always start with the piston side first 18 00:01:07,791 --> 00:01:09,625 because that's the one with the retaining clip, 19 00:01:10,583 --> 00:01:11,791 so we push it in firmly. 20 00:01:12,083 --> 00:01:14,166 Keep your fingers out of the way for that one. 21 00:01:14,916 --> 00:01:15,375 Okay 22 00:01:15,375 --> 00:01:20,375 And then we can put the other pad in on the other side and then fit the retaining clip afterwards. 23 00:01:29,375 --> 00:01:29,833 Right, so 24 00:01:29,833 --> 00:01:34,500 that pad is secured in there now by the spring clip itself, so it can't come out, 25 00:01:34,708 --> 00:01:38,083 and now we can proceed to refit it on the vehicle when we've refitted the disc. 26 00:01:41,208 --> 00:01:42,791 So this brake disc on this vehicle, 27 00:01:42,791 --> 00:01:46,666 sometimes they'll have a shake proof washer or spring clip to hold it on. 28 00:01:47,041 --> 00:01:51,833 This vehicle doesn't, so we're going to have to take care that we don't knock the disc when we're trying to refit it. 29 00:01:55,666 --> 00:01:57,250 OK, if we were replacing this 30 00:01:57,250 --> 00:02:01,875 disc on the vehicle as a new unit, we give it a wipe over with brake cleaner first. 31 00:02:02,083 --> 00:02:04,625 they come fitted with an anti-corrosion coating. 32 00:02:05,166 --> 00:02:09,250 If we don't take the coating off when we first use the brakes and the heat builds up, 33 00:02:09,625 --> 00:02:12,708 the coating melts and then coats the disc pads instead, 34 00:02:12,958 --> 00:02:15,833 and we end up with warped discs with the pedal pulsing. 35 00:02:15,833 --> 00:02:20,291 Customer'll bring the vehicle back, and then we'll have to take it all apart again and repeat the process. 36 00:02:20,666 --> 00:02:25,541 OK, so it's really important if you've got a new disc in a box to use brake cleaner or solvent, 37 00:02:25,875 --> 00:02:29,041 just give it a wipe over on both sides to take the corrosion coating off. 38 00:02:29,291 --> 00:02:30,166 Then we can refit. 39 00:02:31,833 --> 00:02:32,916 OK, so 40 00:02:34,000 --> 00:02:36,750 the disc is in place, so we're going to need one hand to hold that. 41 00:02:36,750 --> 00:02:40,041 While we've got the caliper in our hand, we can check the brake hose itself. 42 00:02:40,958 --> 00:02:44,041 Any splits in there down to the canvas, it's an armored pipe. 43 00:02:44,541 --> 00:02:48,125 Any splits in there or damage, I would replace it. 44 00:02:48,125 --> 00:02:49,750 Brakes are a safety item. 45 00:02:49,750 --> 00:02:52,500 We can't afford to kind of put stuff back together. 46 00:02:53,083 --> 00:02:56,500 OK, the brake hoses themselves have got a white line painted on them, 47 00:02:56,916 --> 00:02:59,708 and that's to stop you twisting them as you reinstall. 48 00:03:00,041 --> 00:03:04,208 So if I turn that one over, we end up with that twist in the pipe. 49 00:03:05,333 --> 00:03:08,125 Not only is it dangerous, it's an MOT failure. 50 00:03:08,583 --> 00:03:14,000 So we need to make sure that the hoses themselves aren't twisted when we refit it and it's kept in a straight line. 51 00:03:20,375 --> 00:03:22,166 OK, so even with a disc there, 52 00:03:22,166 --> 00:03:27,083 we've kind of got that in, we can now proceed to replace the bolts in the order we took them out. 53 00:03:38,708 --> 00:03:40,958 So it always recommend starting the bolts by hand 54 00:03:40,958 --> 00:03:43,750 with a small ratchet, it's quite easy to cross thread at this point. 55 00:03:44,375 --> 00:03:48,125 If we do cross thread, those bolts will then have to take the disc back off 56 00:03:48,125 --> 00:03:52,250 and then re thread it with rethreading material, which is obviously quite a hassle 57 00:03:52,250 --> 00:03:53,958 on the time front. 58 00:03:57,041 --> 00:03:59,208 So we start each one by hand, a few threads 59 00:03:59,208 --> 00:04:01,916 so we can check the alignment. 60 00:04:13,708 --> 00:04:18,166 OK, another purpose for the spring clip on the pads is to keep a bit of tension on the caliper, 61 00:04:18,375 --> 00:04:21,125 as you can see here, because we haven't put this one back on. 62 00:04:21,708 --> 00:04:23,375 You get a rattle on the brakes. 63 00:04:23,375 --> 00:04:29,000 OK, so when you assemble it before we'd refit the wheels, we double check the fitment to make sure we're happy with it. 64 00:04:29,916 --> 00:04:34,416 All new brakes should be bedded in for 300 miles. That means gentle use. 65 00:04:34,666 --> 00:04:38,250 Obviously, if it's an emergency and you've got to brake, then we can use them. 66 00:04:38,666 --> 00:04:42,250 But the initial bedding in procedure is really important for new discs and pads. 67 00:04:42,250 --> 00:04:45,625 The pedal will feel spongy. It's not a cause for concern. 68 00:04:48,208 --> 00:04:49,958 But always explain to the customer 69 00:04:49,958 --> 00:04:52,125 that they've got to be bedded in. 70 00:04:55,125 --> 00:04:55,958 Right, OK, 71 00:04:55,958 --> 00:05:01,416 there is a torque setting for those so we can get that generally about 25 Newton Meters 72 00:05:02,958 --> 00:05:04,750 So what I would do is refit the caliper 73 00:05:04,750 --> 00:05:08,541 we'll put the spring clip on, we'll then pump the brake pedal on the vehicle. 74 00:05:08,541 --> 00:05:11,375 And then we'll recheck the bolts are tight at the correct tightness. 75 00:05:12,750 --> 00:05:15,208 Right. I'm just going to put the spring back in. 76 00:05:19,541 --> 00:05:23,833 And there we go with those lugs located under there that caliper now has no further movement in it. 77 00:05:24,041 --> 00:05:26,291 So it's now safe to reassemble that. 78 00:05:26,291 --> 00:05:29,666 What we would do is when we put the wheel on the vehicle, is we'll spin it by hand 79 00:05:29,666 --> 00:05:34,708 just to check that none of these components are touching the rim and there's no undue noises . 80 00:05:34,708 --> 00:05:37,333 So what I can do now is I can gently pump the pedal back up. 81 00:05:41,625 --> 00:05:45,083 We can see the disc there moving as it locates itself back into place. 82 00:05:46,208 --> 00:05:48,791 That fluid level now should be on the maximum mark. 83 00:05:49,291 --> 00:05:51,625 OK, we can recheck it and then we can clean up. 84 00:05:52,125 --> 00:05:55,000 So all I'm going to do now is just check it turns freely by hand. 85 00:05:55,458 --> 00:05:58,958 This disc can't move in operation because the wheels bolted on top of it. 86 00:05:59,291 --> 00:06:02,500 OK, so it's not a undue cause for concern if it moves. 87 00:06:03,166 --> 00:06:05,250 OK, so we checking the disc's moving by hand. 88 00:06:05,250 --> 00:06:07,541 We're listening for any unusual noises. 89 00:06:07,541 --> 00:06:08,625 Happy with that. 90 00:06:08,625 --> 00:06:11,583 So we can now repump the pedal to make sure it's adjusted. 91 00:06:12,041 --> 00:06:16,041 And now we can just wipe around the top if we need to top up the fluid. 92 00:06:16,041 --> 00:06:17,791 We can use Dot Four brake fluid. 93 00:06:18,833 --> 00:06:20,958 Always use fluid from a sealed container. 94 00:06:21,916 --> 00:06:23,958 Brake fluid absorbs moisture from the air, 95 00:06:24,375 --> 00:06:27,333 so if it's an unsealed container, it's not safe to use 96 00:06:28,333 --> 00:06:30,583 brake fluid change every two years as a rule. 97 00:06:31,541 --> 00:06:35,916 So give the cap a wind around, then we can reassemble the cap. 98 00:06:39,750 --> 00:06:42,250 Recheck the level and then that's all done. 99 00:06:42,375 --> 00:06:44,708 And obviously, you'd repeat the procedure for the other side.