PULLEY-CRANKSHAFT 3108856 - Caterpillar

1. Start the machine, and put the bucket flat on the floor and the stick in a vertical position as shown.2. Remove the two nuts and retaining bolt (4). Remove pin (2). The weight of the pin is 23 kg (50 lb). Pull link assembly (3) out of the bucket. Remove two O-ring seals (1). 3. Fasten a hoist to link assembly (3). Raise the link assembly as shown. Remove the two nuts and retaining bolt (5). Remove pin (6) from the links and bucket cylinder rod. Remove link assembly (3). The weight of the link assembly is 95 kg (210 lb). The weight of pin (6) is 20 kg (45 lb). 4. Remove the two nuts and retaining bolt (7). Remove pin (8), right hand link (9) and left hand link (10). The weight of pin (8) is 14 kg (30 lb). The weight of right hand link (9) is 14 kg (30 lb). The weight of left hand link (10) is 16 kg (35 lb). 5. Remove two lip-type seals (11), four lip-type seals (14), bearings (12) and bearings (13) from the link assembly. 6. Remove lip-type seal (16) from each side of the stick. Using tooling (A), remove bearing (15) from each side of the stick. The following steps are for installation of the bucket linkage group.7. Check the condition of O-ring seals (1). If the seals are worn or damaged, use new parts for replacement.
Be sure the stick pin bore, link assembly bores, link bores, pins and O-ring seals are thoroughly clean and free of dirt prior to installation of the rod links.
8. Install two bearings (15) in the stick at the stick-to-rod link pin joint. Lower the temperature of bearings (15), and install them in the pin bore until each one is 7.5 0.8 mm (0.30 0.03 in) below the outside surface of the stick.9. Using tool (B), install two lip-type seals (16) in the pin bore of the stick. Install each seal with the sealing lip facing toward the outside of the pin bore, and until each one makes