brakes

[sshenton1975]

Hi All

Am going to have a go at changing my front discs. Doesnt look to be too bad a job but can anyone give me the low down on any potential pitfalls^?
Is it absolutely necessary to change pads at same time (want to avoid this if poss as they pretty new)
How long shoudl it take me to change the discs only?

Cheers

Simon

[jonbarrett]

Wheels off, callipers off, old discs off, new discs on, callipers back, wheels back, about 30 minutes.

The wheels have five bolts so the discs can go on in any one of five positions. If you have a dial gauge you can check the runnout in each position to ensure they are running as accurately as possible.

[sshenton1975]

Thanks for your reply mate. Sorry for my true ignorance but i dont have a dial gauge - what would it do exactly? Ensure that the disk is flat to the hub?

Cheers

[VPower]

sshenton1975 said:

Thanks for your reply mate. Sorry for my true ignorance but i dont have a dial gauge - what would it do exactly? Ensure that the disk is flat to the hub?

Cheers

Without a dial gauge, you can just set up a pointer as close to the disk as possible.
We use scribing blocks in Engineering workshops to do this which are just as accurate as a dial gauge but easier to use to be honest.

Turn disk and the gap between disk and pointer will show you any run-out.
Rotate disk to get least run-out and then keep disk at that position.

But there really should be no difference if they are machined correctly!

[Ireland]

I'd suggest puting them on, tightening everything up and going for a leisurely (i.e. SAFE) drive rather than worrying about dial gauges, etc.

If there's and sort of juddering / vibration / etc then you'll have to check them to see if they are perfectly flat.

You'll probably be fine straight off.

[Storer]

Fit new pads too. The existing ones will have formed to the shape of the grooves in your old discs and will possibly damage your expensive new discs>