1980 750K

[James]

this is my new to me 1980 750K. http://www.youtube.com/watch?v=6Vg1v1xHijw&feature=plcp
right now i'm working on the front brakes.
take a look inside the MC reservoir.


MC and caliper are filled with disgusting old mud-like fluid.  the piston is corroded and shot in both. the caliper piston is frozen in. the brake hose seems OK but i'm getting a new one anyways with some pads. i'll keep the old pads and hose for backups.
i just Seafoamed the gas and she is running well, but i will be working on dialing the idle down a bit once it's warmed up.  

[James]

Master Cylinder upon removal. Had to go buy some snap ring pliers:


MC piston removed covered in gunk:


Caliper with piston frozen inside. I googled and found out about the grease gun trick, this worked great at removing the piston.


piston removed. has some knicks out of it. i guess i will need to get a new one ?


soaked caliper and MC in pinesol, cleaned with simple green, wet sanded with 1500 paper. most stuff came off:


bottom of MC has some pitted surface, is this a big deal ?


need to get new rubber for caliper this is tired out:


the saga continues...

[TOOLS1]

The pitting in the master cylinder is no big deal. Be careful with the sanding. It would not take much to sand it out of tolerance, and have it leak. I just use a brass wire wheel on my Dremel tool to clean mine.
TOOLS