These brakes are very easy to work on, here's a reply that i sent a while ago, hope it helps,
I did a full rebuild of the brakes on my 82' S a few months ago and it was very simple to do. The other guys are right in suggesting an inspection of the piston an piston boot, My pistons were rusted in places which was easily removed with some 1200 wet n dry paper, i replaced the boots as they were unsalvagable along with the O Rings as well. Make sure to lubricate well with brake assembly grease when you reassemble everything as it makes certain nothing will bind or seize when you don't want it to. Also i found bleeding each wheel as i completed it and then bleeding all four again when i was finished made sure i got rid of any air lurking in the lines. Also a good way to flush your lines.
The photos below are of the finished product, all the parts required are available from Pelican parts.
Regards, Brenton.
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1982 928S M28.11 Auto
