- Joined
- Mar 18, 2006
- Messages
- 2,848
- Age
- 70
- Location
- Ilkley, W Yorkshire, UK
- Bike
- 2013 ST1300 A9
- 2024 Miles
- 000679
- STOC #
- 2570
Can anyone with a more up to date shop manual confirm or correct this information please.
Front Brake Disc bolts 20Nm
Rear Brake Disc bolts 42Nm
Thank you.
Reason for asking
Front Brake Disc bolts 20Nm
Rear Brake Disc bolts 42Nm
Thank you.
Reason for asking
In January I placed an order for a complete set of OEM brake discs and associated bolts. Sometime this Summer, I intended to replace all 3 discs. I had assumed that there would be short supply, so parts would have to wait for availability from January, and importing stuff into the UK is now no longer the easy overnight process that it used to be. I reckoned that that would give them plenty of time to get here. As it turned out, they arrived the day after ordering them !
'Sometime in the Summer' turned out to be today, at least for the front discs. I had armed myself with everything that I could possible need to undo stubborn hex-socket bolts. Penetrating oil, micro blow lamp, hot water, grinding paste, Good fitting hex and torx drivers. And this morning I went into the garage fully prepared to have the 6th bolt on each wheel refuse to budge without turning the hex socket into a perfect circle.
All of the bolts came out easily. Absolutely no hassle at all. This has got to be a first - so I spent the time that I had saved thoroughly cleaning the wheel since I could now get to the areas that haven't been touched for the last 9 years.
Then to put it all back together again. 20Nm for the the 6 x front brake disc mounting bolts ? Really ? Is that all ? The rear mounting bolts are 42Nm.
Ok. 20Nm it is. It felt about right compared to how easily they unfastened. But why then is 42Nm required for the rear ones. I've checked that all 3 places in the manual give the same value - which usually reveals any discrepancy - ie The General Information Torque values, the start of the chapter 15, and the text in Chapter 15.
The diagram in Ch 15 gives 22Nm for the front disc bolts - so there is a small discrepancy there, but I have found the diagrams less reliable for labelling parts.
I am using a UK Shop manual for 2003/2004 - the A4 Addendum (CH28) has another torque setting table which gives the same info.