01-05-2012, 11:38 AM
Yeah first thing is to work out what size you're playing with - most likely standard DT brakes which will be 247's as mentioned. But yeah, quick measure to confirm.
Then once you've got your bits;
2 13mm bolts hold the caliper on. Once they're out, pull the caliper towards you to push the piston in and make it a bit easier to pull off the pads. Try to support/tie the caliper up to avoid putting pressure on the lines.
Then there's 2 19mm bolts on the back of the hub, which hold the caliper carrier on. These should be tight, you may need a breaker bar to crack them. Then you can remove the carrier.
Then you'll have a smallish torx bit (can't remember the size) holding the disc in place. Although these snap quite regularly and it's not the end of the world.
Once the disc is off, get a wire brush and clean up the surface of the hub before fitting the new disc. Spray the new disc with brake cleaner to remove the protective lubricant.
Also wire brush the carrier where the pads sit, and make sure the sliders (where the caliper bolts to) move freely. If you have some, clean them up and re-grease them.
Then push the piston back in the caliper, big grips are ideal. Go slowly and ease it back.
Then fit your new pads, copper slip on the edges will help prevent squeal.
That's about it really, it's a nice easy job, just take your time and clean everything up.
It'll pay you to make sure that the hub isn't damaged from the wheel bolts being loose though... before you start replacing things.
Then once you've got your bits;
2 13mm bolts hold the caliper on. Once they're out, pull the caliper towards you to push the piston in and make it a bit easier to pull off the pads. Try to support/tie the caliper up to avoid putting pressure on the lines.
Then there's 2 19mm bolts on the back of the hub, which hold the caliper carrier on. These should be tight, you may need a breaker bar to crack them. Then you can remove the carrier.
Then you'll have a smallish torx bit (can't remember the size) holding the disc in place. Although these snap quite regularly and it's not the end of the world.
Once the disc is off, get a wire brush and clean up the surface of the hub before fitting the new disc. Spray the new disc with brake cleaner to remove the protective lubricant.
Also wire brush the carrier where the pads sit, and make sure the sliders (where the caliper bolts to) move freely. If you have some, clean them up and re-grease them.
Then push the piston back in the caliper, big grips are ideal. Go slowly and ease it back.
Then fit your new pads, copper slip on the edges will help prevent squeal.
That's about it really, it's a nice easy job, just take your time and clean everything up.
It'll pay you to make sure that the hub isn't damaged from the wheel bolts being loose though... before you start replacing things.