Second Brake Piston: Inspection

INSPECT 2ND BRAKE PISTON RETURN SPRING SUB-ASSEMBLY
1. Using vernier calipers, measure the free length of the spring together with the spring seat.
  Standard free length:
  
  14.65 mm (0.5768 in.)
  
  Fig 1: Measuring Free Length Of 2nd Brake Piston Return Spring
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002