Lotus Elise S1 Service Notes page 329

I Lotus Service Notes
Section JH
JH.7 - BRAKE MASTER CYLINDER
The tandem brake master cylinder is mounted in the front compartment and is secured to the pedal box
by two M8 bolts. To remove the unit, proceed as follows:
1. Syphon fluid from the reservoir to reduce spillage.
2 . Disconnect the clutch master cylinder supply hose from the reservoir and plug the hose.
3. Release the three brake pipes from the master cylinder, and plug the pipes and ports.
4. Release the master cylinder from the pedal box:
The top fixing bolt uses a Nyloc nut and flat washer on the inside of the box.
The lower fixing bolt uses a captive nut plate within the pedal box.
To Replace Seals
1. Thoroughly clean the exterior of the master cylinder assembly before commencing, in a clean environ-
ment, any dismantling operation.
2 . Carefully withdraw the fluid reservoir spigots from the master cylinder grommets.
3. Remove the pushrod boot and the front piston stop bolt and washer.
4. Using a rounded end mandrel, press the rear piston into the cylinder sufficiently to relieve load on the
cylinder end circlip. Remove the circlip and stop washer, and carefully remove the pistons and
springs from the cylinder. If necessary, knock the cylinder against a wood or plastic surface to
extract the front piston assembly.
Reservoir port
Stop sleeve Rear piston
Front piston
Stop sleeve
retaining screw
Outlet ports
to front circuits
Outlet to rear
circuit
Circlip
n m
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