KIT-VALVE SEAL 1663871 - Caterpillar

Secondary Planet Carrier
DISASSEMBLY 1. Remove the planet pins by driving the roll pins into the center of the planet shafts.2. Slide the planet shaft clear of the carrier wall. Use a punch to drive the roll pins from the planet shafts. Do not reuse the roll pins. 3. Remove the planet shafts, bearings, spacers, thrust washers and gears. Thoroughly clean all parts and inspect for damage and wear. The bearing rollers should not exhibit any irregularities. If the rollers show any sign of spalling, corrosion, discoloration, material displacementor abnormal wear, the bearing should be replaced. Likewise, the bearing cage should be inspected for unusual wear or deformation, particularly the cage separator bars. If there is any damage that will impair the ability of the cage to separate, retain and guide the rollers properly, the bearing must be replaced. The thrust washer contact areas must be free of any surface irregularities that may cause abrasion or friction. The gears and planet shafts should be inspected for abnormal wear of pitting. Replace as needed. ASSEMBLYInsert two (2) bearings and a bearing spacer into a gear, with the spacer between the bearings. Place a thrust washer on each side of the gear, and position into an opening in the carrier. Slide the planet shaft through the carrier, and into and through the gear and thrust washers.Carefully align the pin hole in the carrier with the hole in the planet shaft, and drive a new roll pin into place. Always use new roll pins. Approximately 1/2 of the rollpin should engage the shaft and 1/2 should engage the carrier.Note that the roll pin is slightly recessed in the carrier when properly installed. With a center punch, stake the carrier next to the pin hole. This will distort the hole so the pin will not back out. Repeat these steps for each of the three planet gears.Primary Planet Carrier
To service the primary planet carrier, the steps are the same as for the secondary carrier except there is only one bearing for each gear, and no bearing spacer.