Second Brake Piston: Reassembly

INSTALL 2ND BRAKE PISTON
1. Coat 2 new 2nd brake piston O-rings with ATF and install the 2 2nd brake piston O-rings on the 2nd brake piston.
  
  Fig 1: Installing 2nd Brake Piston O-Rings On 2nd Brake Piston
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Press the 2nd brake piston into the 2nd brake cylinder, being careful not to damage the 2nd brake piston O-ring.
  
  Fig 2: Installing 2nd Brake Piston Into 2nd Brake Cylinder
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002