I stripped down my Spi's brake master cylinder and there's scoring inside so will be buying a new one instead of rebuilding it. It's now the turn of the servo which has a rusty surface to the casing. I don't the o ring between servo and master cylinder had much of a sealing effect when I removed it.

How easy is it to rebuild it? Does the casing have to be split open? Plenty of places will sell you the rebuild kit. I've spent an hour searching the net, including the forum trying to find out how it's rebuilt. It's not in my Haynes manual either.
Thanks for help.
Adam
Edited by BusheyTrader, 27 July 2015 - 04:00 PM.