Second Brake Piston: Disassembly

REMOVE 2ND BRAKE PISTON RETURN SPRING SUB-ASSEMBLY
1. Place SST on the return spring and compress.
  SST 09387-00060
2. Using a screwdriver, pry out the snap ring.
  
  Fig 1: Prying Out Snap Ring
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
3. Remove the piston return spring.
  
  Fig 2: Identifying Piston Return Spring
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
REMOVE 2ND BRAKE PISTON
1. Apply compressed air (392 kPa, 4.0 kgf/cm² , 57 psi) to the oil hole and remove the 2nd brake piston.
  NOTE:
  - Applying the air may cause the piston to jump out. When removing the piston, hold it using a piece of cloth.
  - Do not splash ATF with the compressed air.
    
    Fig 3: Applying Compressed Air To Oil Hole
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
REMOVE 2ND BRAKE PISTON O-RING
1. Remove the 2 O-rings from the 2nd brake piston.
  
  Fig 4: Identifying 2nd Brake Piston
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002