INSULATION 4851747 - Caterpillar

DISASSEMBLY
1. The preferred method of removing the planet gear shaft (14) is to first remove the roll pin (11). This can usually be done by inserting a punch into the hole in the end of the shaft and forcing the roll pin up and out of the hole through the carrier (68).If the roll pin can not be easily removed, and must be sheared, please observe the following:Use a pipe or tube section large enough to support the area around the planet gear shaft. Also, ensure the entire carrier assembly is supported at the same level. When adequately supported, drive or press the gear shaft out of the carrier while shearing the roll pin. 2. Slide the gear shaft out of the carrier.3. Slide the planet gear (15) out of the carrier and carefully remove the loose bearing rollers (16). Use a clean shop towel or other means to keep from dropping the rollers. Repeat for all planet gears.4. If required, remove the retaining ring (16) from the inboard end of sun gear (64) and remove the sun gear from the carrier.5. Thoroughly clean all parts and inspect for damage and wear. The bearing roller should be inspected for signs of spalling, corrosion, discoloration, material displacement or abnormal wear. Inspect the planet gears and shafts for pitting or wear. Replace all components as required.ASSEMBLY
1. If previously removed, insert the sun gear through the planet carrier hub and install the retaining ring to secure the sun gear to the carrier.2. Liberally coat the bore of a planet gear with a good grade of oil soluble grease.3. Support the planet gear on a thrust washer. With the gear centered on the thrust washer, install twenty (20) bearing rollers onto the bore. Coat the rollers with a small amount of grease to help hold them in place as needed. Install the remaining thrust washer onto the planet gear.4. Carefully install the entire gear assembly, including the thrust washers on the top and bottom surface, install it into the planet carrier opening. Insert the planet gear shaft into the gear bore and align the small hole in the shaft with the hole in the edge of the carrier.5. Drive a roll pin into the carrier and planet gear shaft. When installed properly, approx. 1/2 of the roll pin should engage the shaft and 1/2 should engage the carrier. Once installed, use a center punch and "stake" the carrier next to the pin hole to distort the carrier hole so the roll pin will not back out in service.6. Repeat steps 2-5 for the remaining planet gears.