FILM-INSTRUCTION 4852065 - Caterpillar

DISASSEMBLY
1. Place the ring gear assembly on a table with the planetary gear set facing up. 2. Remove the retaining ring (7) that secures the planet gears to the ring gear housing. Lift the planet carrier assembly out of the ring gear. Refer to the "Secondary Planet Carrier Service" section of this manual for service procedures. 3. Use a press or a compression tool to force the pressure plate (6) down against the spring force. Apply just enough force to allow the pressure plate to clear the lower retaining ring. Remove the retaining ring (7) from the groove and remove the pressure plate.4. Remove the twenty-four (24) clutch springs (5). 5. Turn the ring gear housing over with the large end down. Tap the clutch piston (2) out of the ring gear using a rubber mallet or a soft driver. Discard the O-rings.6. Thoroughly clean all parts and inspect for damage or wear. Check the piston sealing surfaces for any scoring could damage seals or create any sealing problems. Make certain the clutch pressure port is open and free of any contamination. 7. Check the clutch spring (5) free length; minimum free length should be 2.38 in. (60.3 mm). Check the springs for any sign of cracks or other failure. If any spring must be replaced for any reason, then ALL clutch springs must be replaced.ASSEMBLY
1. Place the ring gear housing on a clean work surface with the large end facing up.2. Install new O-rings (3, 4) into the clutch piston (2) grooves. Lubricate the O-rings liberally and install the piston into the ring gear housing. Apply even pressure to the piston to seat the piston seals into the ring gear and press the piston into place. Be sure to seat the piston into the bottom of the ring gear bore.3. Install twenty-four (24) springs into the spring bores of the piston.4. Place the pressure plate (6) into the ring gear housing on top of the springs. Make sure that the shoulder for the retaining ring is facing upward.5. Apply even pressure as needed to force the pressure plate below the retaining ring groove and install the retaining ring (7). Make certain the retaining ring is fully seated into the groove before releasing the pressure plate. 6. Place the secondary planet carrier assembly into the ring gear with the output sun gear facing upward.7. Install the retaining ring (7) into the groove above the planet gears. Make certain the retaining ring is fully seated into the bottom of the groove.