Loose bolts rear brake disc....

[Grumpy Lee]

...again!!!

This is the second time that the bolts have become loose, so I presume I'll have to Loctite them this time (unless the collective wisdom deigns otherwise )

Have others had this problem (with or without bolt unscrewing compound)?

So the manual says Loctite 243, is this just normal threadlock type stuff - or something special?

As usual, all advice read, digested and then I'll probably do what I was going to do anyway (once I decide what it is)

 

[Colban]

Never had a problem with mine.
Are you torqueing them up to the correct figure?.
Do you use anti-shake washers or do you put any copperslip on them?.
A dab of Loctite normal strength might be in order.

 

[MikeP]

So the manual says Loctite 243, is this just normal threadlock type stuff - or something special?

I've seen a torx key snapped because the 243 wasn't softened with heat before trying to undo rear brake disc mounting bolts.

I guess it's there for a reason.

http://www.bearingshopuk.co.uk/index.asp?function=DISPLAYPRODUCT&productid=3089

 

[Grumpy Lee]

Are you torqueing them up to the correct figure?.

Yes

Do you use anti-shake washers

I don't think there are any on th 1150

Do you put any copperslip on them?.

Will that make them undo themselves?

 

[Mzokk]

...again!!!

This is the second time that the bolts have become loose, so I presume I'll have to Loctite them this time (unless the collective wisdom deigns otherwise )

Have others had this problem (with or without bolt unscrewing compound)?

So the manual says Loctite 243, is this just normal threadlock type stuff - or something special?

As usual, all advice read, digested and then I'll probably do what I was going to do anyway (once I decide what it is)

243 is the normal blue stuff. The red stuff (cant remember the number now) really does need heat to release it.

 

[Colban]

Yes



I don't think there are any on th 1150



Will that make them undo themselves?

My bolts are standard (no anti-shake washers),fitted with copperslip and not tightened with a torque wrench.They have not come loose.
If yours come loose repeatedly when they are assembled as per the book,i would try other solutions,ie washers,loctite,wiring them or replacing the bolts.
Maybe the fact that you run the bike with a sidecar causes unusual load/stress problems.
Brakes are somewhat important to your well-being,so why not try something different and check the bolts frequently until the problem is solved.

 

[MikeP]

Loctite 243 Threadlocker

A removable strength, general-purpose threadlocking adhesive especially well suited for fasteners between 1/4" and 3/4" diameter. Tolerant of oil and other contamination. Protects threads from rust and corrosion. Cures reliably even on stainless steel. Available Worldwide

Specifications:

* Machine tools, presses, pumps, compressors, mounting bolts, gearboxes.
* NSF/ANSI 61
* 24078

I'm probably a bit anal but the manual says use 243. It's £20 from the link I posted (above), I don't think that's too high a price to pay to keep a brake disc from coming loose.

 

[(RIP) Bin Ridin]

Tightening torque is not that high, are you sure the disc is straight and seating correctly on the hub? Funny they should come loose, wonder why?
Possible hydraulic lock in the threaded hole, is it blind? Too much goop?
If I had no loctite, I'd clean the screws and holes well, spray brakecleaner or meths, drop of engine oil, and tighten well.

 

[ELIMINATOR]

Lee, ignoring the numbers for a while. Threadlock undoes with handtools, studlock

 

[diversion74]

Hello,
Just to put my two peneth in.
When I swapped discs on my previous GS (1100) I used the loctite 243.
Should just crack off when you come to undo them in future.
Loctite 243 on offer at Cromwell tools at minute. About a fiver for a 10ml tube which is ample for quite a few screws.

Cheers.
Andy