Disassembly (ES300 & RX300 With TRAC)

Using pliers, slide 2 clips, and remove reservoir hoses from reservoir. Remove cap, strainer and clip from reservoir. Remove brake reservoir set screw, and pull out union. Remove 2 grommets. SeeFig 1 or Fig 2 .
On RX300 models with ABS, place master cylinder in a soft-jaw vise. Remove brake fluid reservoir. Using a screwdriver, push No. 1 piston inward and remove piston stopper bolt, gasket and snap ring. See Fig 1. Pulling straight out, remove No. 1 piston and spring from cylinder bore. Lightly tap cylinder flange against black edges until No. 2 piston and spring drop out of cylinder.
On RX300 models with TRAC, using screwdriver, push piston inward, and remove 2 straight pins by turning cylinder body. Remove 2 pistons by hand, pulling straight out.

Fig 1: Exploded View Of Master Cylinder (RX300)

Fig 2: Exploded View Of Master Cylinder (ES300)