Torque setting on brake calipers ?? - BMW Luxury Touring Community
 
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post #1 of 12 Old Sep 7th, 2006, 9:09 pm Thread Starter
 
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Torque setting on brake calipers ??

Just received Motolights and want to install on 06 KLT this weekend. Does anyone know what the torque setting is for the brake caliper?
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post #2 of 12 Old Sep 7th, 2006, 9:31 pm
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Quote:
Originally Posted by BToliver
Just received Motolights and want to install on 06 KLT this weekend. Does anyone know what the torque setting is for the brake caliper?
Brake caliper to fork tube = 40 Newton Meters.
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post #3 of 12 Old Sep 7th, 2006, 9:35 pm Thread Starter
 
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Thanks, Dick, just what I needed.
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post #4 of 12 Old Sep 8th, 2006, 12:24 pm
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Be careful! I used this torque setting and snapped two of the bolts before coming to my senses. My friendly BMW shop foreman informed me that they tighten these bolts ' till they are tight' and disregard the factory spec. YMMV, but I hope it works our better for you.

Brett

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post #5 of 12 Old Sep 8th, 2006, 1:11 pm
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Quote:
Originally Posted by Shogun54
Be careful! I used this torque setting and snapped two of the bolts before coming to my senses. My friendly BMW shop foreman informed me that they tighten these bolts ' till they are tight' and disregard the factory spec. YMMV, but I hope it works our better for you.
That is only 29.4 ftlbs, and that is not a lot of torque. Sure you had the correct bolts? I'm sure David will chime in on the breaking strength of those bolts as all I could find is that the standard dry torque for a fine thread M8 ISA is 29.4 Ft Lbs

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Last edited by jzeiler; Sep 8th, 2006 at 1:48 pm.
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post #6 of 12 Old Sep 8th, 2006, 8:13 pm
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(1) Typically the bolts don't break - rather, they start to strip the threads that they screw into when overtorqued. It's not uncommon to need Heli-Coils to replace the stripped threads.

(2) According to my dealer, the torque has changed from the first LTs (pre-power brakes) to the '02 and newer LTs (with power brakes). The newer LTs have a lower torque spec for these bolts than the older LTs had.

(3) And when the new, lower torque spec is used on the newer bikes, the service techs still see some occasional thread stripping.

I **think** the newer bikes are spec'd at 21 lb-ft torque for the brake caliper bolts. Please check with your dealer to be sure.

- Bob

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post #7 of 12 Old Sep 8th, 2006, 9:51 pm
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You are correct Bob, the 05 manual states 30 Nm or 22.1 Ft Lbs and that is for ALL year Integral Brakes. Only the older ABS II was spec'ed at 40 Nm.

John
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post #8 of 12 Old Sep 8th, 2006, 10:52 pm
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Sorry guys, bolts were the same ones that came out of the mount. They both snapped, as in broke in half, about 1/4 inch up from the end of the threads. Had to get them out with a drill. 'New' bolts ( one actually new and the other dug out of the spare parts bin at the dealer...not a well stocked part ) worked very well when tightened as described above. Maybe I'm just lucky and got some defective bolts originally. Gives you a real good feeling doesn't it?

Brett

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post #9 of 12 Old Sep 9th, 2006, 1:39 am
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Torque

'03 manual also says 30 Nm

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post #10 of 12 Old Sep 9th, 2006, 3:14 am
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Smile BMW versus Brembo

Seems from what I've read that if your calipers are branded " Brembo" then it's 40 Nm. If they are branded "BMW" then it's 30 Nm. Haven't broken any bolts yet. Not sure when the change over occured, or why there should be any difference on bolts doing the same job? Maybe there are some differences with the caliper. Cheers.

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post #11 of 12 Old Sep 9th, 2006, 5:50 am
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Quote:
Originally Posted by BToliver
Just received Motolights and want to install on 06 KLT this weekend. Does anyone know what the torque setting is for the brake caliper?
Hi, Brad -

Geez - my apologies that I gave you bad info on the Nm setting for the caliper bolts when adding the Moto-Lites. As Hilton and Menton and others have said, my shop manual, in listing the 40 Nm torque value, applies only to the pre-'02 model years of LTs with Brembo calipers. I'll be sure and check the LT model year of future questioneers, and keep my trap shut if their LT isn't the same as Toad (my '99).

Hope you read the rest of the replies from the good folks with newer model LTs and shop manuals, and do the job correctly. Again, sorry for the incorrect #.
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post #12 of 12 Old Sep 9th, 2006, 6:11 am Thread Starter
 
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No problem...... After reading the post from Brett about "snapping two of his bolts" I decide to order the shop manual. Got the lights installed last night and would like to post a picture but can't figure out how to do it.

Thanks to the archives, I was able to mount and wire everything myself & donated the money I saved to the forum.... Thanks Guys!

_______________
Brad
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Still have an Ultra Classic for sale
Tulsa, OK
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