XT BR-M775 - serviceable?

[Once A Hero]

I've got a set of these on my Giant Anthem which is in the LBS at the moment, I hoped for a simple brake bleed of the front brake. I wanted them to do the work as I'm always getting boxes from them and spending very little. However they've told me both callipers are leaking and they aren't serviceable so need to be replaced - at quite considerable expense.

Is this correct that they can't be serviced?
If not where can I get service items?



I'm collecting the bike later as I don't have the budget for what they've quoted me to replace them

 

[wesmamyke]

Shimano does not sell seals or pistons if I recall. Search ebay or any other site and after market seal/piston kits come up. All Shimano calipers are basically interchangeable as long as they take the same hose. You can replace them whatever is cheapest if you don't care about them being XT. Some of the weirder groups cane be super cheap, like Hone or LX trekking stuff.

There was a guy with a blog/site blue liquid labs that had tried to fix leaking issues by swapping out slightly different seals and o-rings. The page is gone now from his site, although one of the pictures comes up in search.