fatchance996
Just thought I'd pass on my ordeal with these front disks.
To start with, I have a Aug 07 SD with 7500ks. My front disks seemed strange when aplying the brakes lightly while riding very slow but worked great when up in the higher speed area. I got the dealer (100 ks away) to put a dail gauge on them when it was put in for its 7500 ks service and valve shim check. The left disk was within 0.05mm but the right disk (on the disk carrier below the rivets) was out 0.21 and 0.28 on the very outer edge of the disk itself . To cut a story short, i went home and went about fixing it myself (with my dealers blessing)as i have aligned turbine blades etc many times. After removing the mudgaurd, mounted the dail gauge to the forks and clocked the run-out and marked were it was worse, disk and wheel. I then removed the wheel and removed the right disk from the wheel and clean every thing up. I then rotated the disk about 180 deg, cleaned the bolts and aplied locktite 234 and assembled the disk to the wheel but only finger tightened all the bolts. Assembled the wheel in the forks and put the dail gauge base on the fork leg and then the gauge on the carrier just below the rivits. I set the dail gauge so it was even, ie approx -0.10 to +0.10 so the 0.00 mark is in the middle of the total runout. Turned the wheel so it was on the -0.10 then tightend that disk nut to 20Nm while watching the gauge to make sure the needle was moveng towards the 0.00, turned the wheel to find the next negitive reading and tighten that nut and so on till all were tightend then did it all again on 30Nm. Bingo. Now the runout is 0.06 on the carrier and 0.09 on the outer disk. Note. all this is done with the brake calipers removed from the fork legs.
Also i do the wheel tighten bit a tad different to the book. I assemble the axle and axle nut etc and tighten it enough so the whole axle turns in the forks with all the clamps screws loose. Then I tighten the right leg clamps to 15Nm then tighten the axle nut to its 60Nm then lastly tighten the left clamp screws to 15Nm. Clear as Mud !!!
To start with, I have a Aug 07 SD with 7500ks. My front disks seemed strange when aplying the brakes lightly while riding very slow but worked great when up in the higher speed area. I got the dealer (100 ks away) to put a dail gauge on them when it was put in for its 7500 ks service and valve shim check. The left disk was within 0.05mm but the right disk (on the disk carrier below the rivets) was out 0.21 and 0.28 on the very outer edge of the disk itself . To cut a story short, i went home and went about fixing it myself (with my dealers blessing)as i have aligned turbine blades etc many times. After removing the mudgaurd, mounted the dail gauge to the forks and clocked the run-out and marked were it was worse, disk and wheel. I then removed the wheel and removed the right disk from the wheel and clean every thing up. I then rotated the disk about 180 deg, cleaned the bolts and aplied locktite 234 and assembled the disk to the wheel but only finger tightened all the bolts. Assembled the wheel in the forks and put the dail gauge base on the fork leg and then the gauge on the carrier just below the rivits. I set the dail gauge so it was even, ie approx -0.10 to +0.10 so the 0.00 mark is in the middle of the total runout. Turned the wheel so it was on the -0.10 then tightend that disk nut to 20Nm while watching the gauge to make sure the needle was moveng towards the 0.00, turned the wheel to find the next negitive reading and tighten that nut and so on till all were tightend then did it all again on 30Nm. Bingo. Now the runout is 0.06 on the carrier and 0.09 on the outer disk. Note. all this is done with the brake calipers removed from the fork legs.
Also i do the wheel tighten bit a tad different to the book. I assemble the axle and axle nut etc and tighten it enough so the whole axle turns in the forks with all the clamps screws loose. Then I tighten the right leg clamps to 15Nm then tighten the axle nut to its 60Nm then lastly tighten the left clamp screws to 15Nm. Clear as Mud !!!