Lotus Elise Service Notes page 475

Lotus Service Notes
Section OG
To overhaul the master cylinder:
Clamp the cylinder in a soft jawed vice, and pull the rubber dust boot off the cylinder end.
Remove the circlip from the end of the cylinder, taking care not to scratch the bore surface. Remove the
stop washer and extract the cylinder internal parts. Lay the components in their correct order on a clean
sheet of paper.
Remove the rubber seals from the piston, taking note of the position and orientation of all parts.
Clean all parts thoroughly with only new brake fluid, and dry with a lint free cloth. Carefully examine the
cylinder bore for scoring, corrosion or visible wear, and replace if any such signs are apparent. Check
that all drillings in the cylinder body and piston are clear. If the cylinder is serviceable, rebuild the unit
using new seals and components from the appropriate overhaul kit.
Note that the chamfer on the inside diameter of the stop washer should face rearwards (i.e. towards open
end of cylinder).
Master cylinder body
Spring
Spring retainer
Piston washer
Secondary seal
Pushrod
Spring
retainer Piston
washer
Pushrod
Secondary
seal
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