#1: OSF brake binding - failed MOT Author: liam1988, Location: CornwallPosted: Tue May 26, 2015 3:22 pm ---- Annoying as hell, but my car failed mot on a binding brake. it's only on the osf, but don't know what I should change? Brake hose or caliper? Any info would be great. What would you guys do? Anyone else had thisproblem?
Cheers
Liam
#2: Re: OSF brake binding - failed MOT Author: Steve206, Location: UKPosted: Tue May 26, 2015 3:37 pm ---- Disc or drum?
#3: Re: OSF brake binding - failed MOT Author: liam1988, Location: CornwallPosted: Tue May 26, 2015 7:06 pm ---- Disc
#4: Re: OSF brake binding - failed MOT Author: mtempsch, Location: Gothenburg, SwedenPosted: Wed May 27, 2015 1:09 am ----
liam1988 wrote:
Annoying as hell, but my car failed mot on a binding brake. it's only on the osf, but don't know what I should change? Brake hose or caliper? Any info would be great. What would you guys do? Anyone else had thisproblem?
Don't see how a hose could cause sticking, so caliper. Typically a question of corrosion, so a disassembly and a good going over with a steel brush +greasing of moving surfaces on the caliper, is often enough.
Doing it with it still on the car won't require bleeding, but removal is likely to give you better/easier access to clean.
Could be corrosion on the surfaces of the cylinder bore wall / piston. I'd probably go for a new/recon'd caliper in that case.
This video might be of interest, though not 206 specific.
#5: Re: OSF brake binding - failed MOT Author: liam1988, Location: CornwallPosted: Wed May 27, 2015 11:21 am ---- Hey mtempsch,
Thanks for the response, found a brand a new Bosch caliper for my 206 delivered for £50, by far the cheapest I could find. Will fit it when it comes and hopefully that should sort it... hopefully.
Liam
#6: Re: OSF brake binding - failed MOT Author: MrBSI, Location: What's it to you? ? ?Posted: Wed May 27, 2015 12:38 pm ----
mtempsch wrote:
Don't see how a hose could cause sticking
Flexi hoses can break down internally with age & the rubber inside the hose can then act like a one way valve giving good fluid flow in one direction & restricted or no flow back the other way.
#7: Re: OSF brake binding - failed MOT Author: mtempsch, Location: Gothenburg, SwedenPosted: Wed May 27, 2015 12:54 pm ----
MrBSI wrote:
mtempsch wrote:
Don't see how a hose could cause sticking
Flexi hoses can break down internally with age & the rubber inside the hose can then act like a one way valve giving good fluid flow in one direction & restricted or no flow back the other way.
Ah, I see. Never seen or heard of that one before... live and learn!
To test I'd imagine unscrew hose, stick in bottle with brake fluid (end of hose below surface), depress brake & see fluid level in bottle rise, release brake and level doesn't go back down (or very slowly)?
#8: Re: OSF brake binding - failed MOT Author: ukskater01, Location: sutton surrey/welwyn garden cityPosted: Wed May 27, 2015 3:29 pm ---- Have the brake pads been replaced recently?
#9: Re: OSF brake binding - failed MOT Author: 206gt160, Location: BlackburnPosted: Thu May 28, 2015 7:59 am ---- Strip down the caliper clean up all the moving parts and rebuild it with new seals and pack everything with grease. That should solve the binding.
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