Toyota Sienna Service Manual: Reassembly

1. INSTALL 2ND BRAKE PISTON O-RING

(a) Coat 2 new O-rings with ATF, and install them in the 2nd brake piston.

NOTICE: Make sure that the O-ring is not twisted or pinched.

2. INSTALL 2ND BRAKE PISTON

(a) Coat the 2nd brake piston with ATF, and install it to the 2nd brake cylinder.

NOTICE: Be careful not to damage the O-ring.

3. INSTALL 2ND BRAKE PISTON RETURN SPRING SUB-ASSEMBLY

(a) Install the 2nd brake piston return spring.

NOTICE: Installing the spring sub- assembly, check that all of the springs are fit in the piston correctly.

(b) Place SST on the piston return spring, and compress the piston return spring with a press.

SST 09387-00060

(c) Using a screwdriver, install the snap ring.

(d) Be sure that the end gap of the snap ring is not aligned with the spring retainer claw.

NOTICE:

• 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.