We've got Spiegler master cylinder with unique design for rebuild
The main feature is the variable pivot
Pulling the lever, pivot becomes shorter
Variable pivot is realized due to inverted piston
On practice you get less effort, better sensitivity and more efficient braking
This master is automatically bleedered, because the brake box hole is located in the topmost point of the cylinder
Disassembling is started with lever removing
Unscrew the piston rod completely
Next unscrew the lever bracket
To remove the lever bracket unclench the clamp
Variable pivot is realized by brass slides in the bracket and rotary guides on the lever
Also, lever has two positions of pulling effort, which can be switched by bushing rotating
To remove the cap you need special wrench We made it from the nut head
There is a dirt inside
The dirt can accumulate, If you don't change the brake fluid for a long time
The spring remains, but the piston with seal are changed
The seal in the cap should be removed
I use aerosol cleaner Suprotec to clean all parts, it has nice smell and does not affect the rubber
O-ring on the cap should be change
I install new piston with seals Parts should be lubricated with brake fluid
First, I install piston seal
Next, I install o-ring on the cap and small seal in the cap
Small seal is hard to install, because it has bigger diameter than the hole in the cap
The seal is symmetric and no matter which side to install it
Now the cap is installed
To install the bracket, the clamp should be unclenched
Rotating bracket allows to use master cylinder both right and left side: for front brake and clutch or handbrake
All parts of the lever should be lubricated
The master cylinder should be attached to the brake system and left under pressure for a while to check it
Lever position can be adjusted rotating the piston rod
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