Binding front brake

[gideonr]

Hi,

I've been having an issue with the front drivers side brake binding.
It's not making any significant squeaking sound on the move but is obviously binding enough for the wheel to become hot after a run.
The caliper, hub carrier and brake flex have all been replaced but this has not resolved the problem.
The disc looks fine.
Anyone got any ideas? Could it be the master cylinder?

Cheers.

[muley]

If you jack the car up and spin the wheel can you detect the brake binding?

If it feels "lumpy" when turned it could be the wheel bearing failing

You say the calipers have been replaced. It might be worth double checking that the sliders are free

I doubt the master cylinder would create this problem ~ a failing master
cylinder would result in your brake pedal slowly going to the floor when you depress it.

[dapinky]

+1 for checking the calliper sliders......

..... especially if the calliper has been replaced.

Two possible issues, first being that the sliders as fitted will have some grease on them, but not as much as it needs, so if fitted 'straight from the box' they can seize up fairly quickly......
.... secondly, if the 'new' calliper is a 'recon' unit, the sliders fitted may or may not be the perfect size, especially if the old ones were transferred to the new unit....... a bit like other engineered parts, they have different sizes to allow for different clearances.

I have a box of old sliders which I trawl through to find the best fit for each calliper, and then they stay in the same position forever.

If one of yours is a bit tight, it can be 'eased' with abrasive paper wrapped round a metal shank and used in a drill, applied to the calliper....... but set the fit with just the metal unit, NOT with the rubber seal part fitted on the sliders.