new brake disc sensor ring must be re-marked? - BMW Luxury Touring Community
 
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post #1 of 6 Old Feb 14th, 2013, 5:08 pm Thread Starter
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new brake disc sensor ring must be re-marked?

Today I pulled the rear wheel for a tire change. And figured I would install my ebc rotor to get rid of the cowbell sound. All went well but I have a question. In the manual it says if you install a new brake disc the sensor ring must be re-marked? What does this mean and how do I do it?
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post #2 of 6 Old Feb 14th, 2013, 5:17 pm Thread Starter
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Re: new brake disc sensor ring must be re-marked?

ok I read a little further in the manual and found my answer.

• Measure radial runout round the entire circumference
of the ABS sensor ring.
e Caution:
If replacement parts are fitted, the sensor ring must
be re-marked; remove the old mark.
• With a paint pencil, make a permanent mark at
the point on the ABS sensor ring at the greatest
distance from the ABS sensor.
• Installation is the reverse of the removal procedure:
pay particular attention to the following.
• Check/adjust ABS sensor gap.
X Tightening torque:
ABS sensor .................................................. .. 4 Nm




I have the feeler gauge but not the dial gauge or extension. How important in this step? Is there a way to do it without the special tools?

And how do I adjust the gap?
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post #3 of 6 Old Feb 14th, 2013, 5:52 pm
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Re: new brake disc sensor ring must be re-marked?

The ABS sensor gap must be within the specs printed on the side/top of your final drive. Ideally it will be within spec all the way around the ring as it is turned. If it is too far out of spec it will trigger an ABS fault. It is adjusted using shims which fit between the sensor and the FD case. Setting the gap can be a problem if you set it in the wrong spot as this can cause the ring to contact the sensor. Find the spot where the ring is closest to the sensor and set the gap at that spot, therefore the "mark" on the ring.


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post #4 of 6 Old Feb 14th, 2013, 6:23 pm Thread Starter
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Re: new brake disc sensor ring must be re-marked?

Thank you, that sounds simple enough.
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post #5 of 6 Old Feb 14th, 2013, 7:54 pm
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Re: new brake disc sensor ring must be re-marked?

Quote:
Originally Posted by deanwoolsey
Find the spot where the ring is closest to the sensor and set the gap at that spot, therefore the "mark" on the ring.
Just backwards. Set the gap at the farthest point as you don't want the sensor to lose sight of the ring. Then roll it around to make sure it doesn't hit ( don't worry it won't).

John
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Have ridden a Motorcycle in all 48
But lack DE, MA, RI and CT with the 2005 LT

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post #6 of 6 Old Feb 14th, 2013, 9:30 pm
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Re: new brake disc sensor ring must be re-marked?

I can't deny doing it backwards. I set mine at the high point with the gap at the narrow end of acceptable. I'm sure John has it right.


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