Second Brake Piston

OVERHAUL
1. REMOVE 2ND BRAKE PISTON RETURN SPRING SUB-ASSY





a. Place SST on the return spring and compress.
SST 09387-00060
b. Using a screwdriver, remove the snap ring.





c. Remove the piston return spring.





2. INSPECT 2ND BRAKE PISTON RETURN SPRING SUB-ASSY
a. Using vernier calipers, measure the free length of the spring together with the spring seat.
Standard free length: 16.61 mm (0.6539 inch)





3. REMOVE 2ND BRAKE PISTON
a. Hold the 2nd brake piston and apply compressed air (392 kPa, 4.0 kgf/cm2, 57 psi) to the 2nd brake cylinder to remove the 2nd brake piston.





4. REMOVE 2ND BRAKE PISTON O-RING
a. Remove the 2 O-rings from the 2nd brake piston.





5. INSTALL 2ND BRAKE PISTON O-RING
a. Apply the 2 new O-rings with ATF, install them in the 2nd brake piston.





6. INSTALL 2ND BRAKE PISTON
a. Apply the 2nd brake piston with ATF, and install it to the 2nd brake cylinder.

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

7. INSTALL 2ND BRAKE PISTON RETURN SPRING SUB-ASSY





a. Install the piston return spring.





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 the end gap of the snap ring is not aligned with the spring retainer claw.

NOTICE:
^ Stop the press when the spring sheet is lowered to the place 1 - 2 mm (0.039 - 0.078 inch) from the snap ring groove.
^ This prevents the spring sheet from being deformed.