shimano caliper leaking

[SolemnWeasel]

I am now convinced that the BR-m525 rear caliper of mine is leaking - with light reflection I can see oil weeping in the middle when I brake. I don't think it is the piston seals gone.
That explains why they squeel extremely and loose power for the second time now.

I am wondering - should i replace with the cheap Shimano BR-MT200, or try to troubleshoot and maybe replace the O-ring? Or buy better caliper.
I hope I could reuse the lever and hydraulic line.
Never replaced hydraulic parts yet - I understand I need an olive and 'barb' to install?

Thanks for tips.

 

[wafter]

When you say "weeping in the middle" do you mean between the two halves of the caliper?

IMO always worth trying to save stuff; while you have nowt to lose if you're prepared to replace it anyway. Presumably the caliper halves just bolt together with fluid drillings sealed with O-rings / a gasket / sealant?

IIRC I vaguely recall watching a caliper strip on youtube; didn't seem terrible.


EDIT: Not your caliper but I'm sure they're all much of a muchness; looks straightforward with the only potential pain being piston removal if you don't have a source of compressed air.

 

[SolemnWeasel]

Yes, it is weeping / leaking between the two halves - very difficult to see - I only noticed when I saw that light reflection changed when pressing. I might go to a bike self repair place and see if they have o-rings for it.