Overdrive Brake

OVERDRIVE BRAKE

Overdrive Brake:

COMPONENTS


OVERDRIVE BRAKE DISASSEMBLY
1. CHECK OVERDRIVE BRAKE PISTON MOVEMENT





a. Place the O/D support assembly onto the direct clutch assembly.





b. Apply compressed air into the oil passage as shown, and be sure that the O/D brake piston moves smoothly.
2. REMOVE CLUTCH DRUM THRUST WASHER FROM OVERDRIVE SUPPORT
3. REMOVE PISTON RETURN SPRING





a. Place Special Service Tool (SST) on the spring retainer, and compress the return spring with a press.
SST 09350-30020 (09350-07030)
b. Remove the snap ring with a screwdriver.
c. Remove the piston return spring.
4. REMOVE OVERDRIVE BRAKE PISTON





a. Place the O/D support onto the direct clutch assembly.





b. Hold the O/D brake piston so it does not slant, and apply compressed air into the passage to remove the O/D brake piston.
c. Remove the O/D brake piston.
d. Remove the 2 O-rings from the piston.





5. REMOVE 2 OIL SEAL RINGS

OVERDRIVE BRAKE INSPECTION
INSPECT DISC, PLATE AND FLANGE
Check to see if the sliding surface of the disc, plate and flange are worn or burnt. If necessary, replace them.





HINT: If the lining of the disc is peeling off or discolored, or even if a part of the printed numbers are defaced, replace all discs.

OVERDRIVE BRAKE ASSEMBLY





1. INSTALL OIL SEAL RINGS
a. Coat the 2 oil seal rings with Automatic Transmission Fluid (ATF).
b. Install the 2 oil seal rings to the O/D support groove, then snug them down by squeezing their ends together.

NOTICE: Do not spread the ring ends more than necessary-

HINT: After installing the oil seal rings, check that they rotate smoothly.





2. INSTALL OVERDRIVE BRAKE PISTON
a. Coat the 2 new O-rings with ATF and install them on the O/D brake piston.
b. Being careful not to damage the O-rings, press in the brake piston into the O/D support with both hands.
3. INSTALL PISTON RETURN SPRING





a. Install the piston return spring.





b. Place SST on the spring retainer, and compress the return spring with a press.
SST 09350-30020 (09350-07030)
c. Install the snap ring with a screwdriver. Be sure the end gap of the snap ring is not aligned with the cutout portion of the O/D support.





4. INSTALL CLUTCH DRUM THRUST WASHER
Coat the thrust washer with petroleum jelly and install it onto the O/D support.

HINT: Make sure that the lug shape matches the hole on the O/D support.





5. CHECK OVERDRIVE BRAKE PISTON MOVEMENT
a. Place the O/D support assembly onto the direct clutch assembly.
b. Apply compressed air into the oil passage as shown, and be sure that the O/D brake piston moves smoothly.