Second Brake Piston: Reassembly

INSTALL 2ND BRAKE PISTON O-RING
1. Coat 2 new O-rings with ATF, and install them in the 2nd brake piston.
  NOTE: Make sure that the O-ring is not twisted or pinched.
  
  Fig 1: Locating 2nd Brake Piston O-Ring
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
INSTALL 2ND BRAKE PISTON
1. Coat the 2nd brake piston with ATF and install it to the 2nd brake cylinder.
  NOTE: Be careful not to damage the O-ring.
  
  Fig 2: Installing 2nd Brake Cylinder
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
INSTALL 2ND BRAKE PISTON RETURN SPRING SUB-ASSEMBLY
1. Install the 2nd brake piston return spring.
  NOTE: After installing the spring sub-assembly, check that all of the springs are engaged in the piston correctly.
  
  Fig 3: Identifying 2nd Brake Piston Return Spring
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Place SST on the piston return spring and compress the piston return spring with a press.
  SST 09387-00060
3. Using a screwdriver, install the snap ring.
4. Be sure that the end gap of the snap ring is not aligned with the spring retainer claw.
  NOTE: Stop the press when the spring seat is lowered to the place 1 to 2 mm (0.039 to 0.078 in.) from the snap ring groove. This prevents the spring seat from being deformed.
  
  Fig 4: Compressing Return Spring
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002