CYLINDER BLOCK ASSEMBLY 8S4631 - Caterpillar

Illustration 10 g03801399
Illustration 11 g06057339
Use the torque wrench to rotate the axle housing assembly. Use Tooling (D) to tighten nut (22). The torque wrench reading must equal the axle bearing preload rolling torque plus the actual seal drag torque. Use the seal drag torque that was recorded in Step 15. Use the following formula to calculate the required torque wrench reading. This formula is used to measure torque at the bolt circle."C = " (B x (T + SDT)) / (B + A)"C" is the torque wrench reading in newton meters (N m)."B" is the length of the torque wrench in meters."A" is the bolt circle radius of axle housing assembly (10) in meters. This equals 0.229 m (9.0160 inch)."SDT" is the actual seal drag torque in newton meters (N m)."T" is the axle bearing preload rolling torque. The preload rolling torque for new bearings is 9 N m (7 lb ft) to 16 N m (12 lb ft). The preload rolling torque for used bearings is 4.5 N m (3.5 lb ft) to 8 N m (6 lb ft).
The axle shaft should have zero end play. If the axle bearing preload rolling torque exceeds the specification, back off bearing nut (22) by 1/8 turn and reseat bearing cone (23) against bearing nut (22). Perform Step 16 again.
Illustration 12 g06048072
Install retaining ring (12) on planet carrier (21).
Illustration 13 g06057376
Apply a thin coat of clean SAE 30 oil on all parts of planet carrier (21).
Install bearing (20) in planetary gear (19).
Install thrust discs (18) and planetary gear (19) in planet carrier (21).
Illustration 14 g06057377
Install planetary shaft (17). Make sure that spring pins (15) and (16) hole in planetary shaft (17) is aligned with the spring pin hole in planet carrier (21). Install new spring pins (15) and (16).
The openings of spring pins (15) and (16) must be 180 degrees away from each other. The openings of spring pins (15) and (16) must be parallel to the deck plane of carrier assembly.
Repeat Steps 19 through 23 for the remaining two planetary gears.
Illustration 15 g06048032
Attach Tooling (C) and a suitable lifting device to planetary carrier assembly (14). The weight of planetary carrier assembly (14) is approximately 60 kg (132 lb).
Install planetary carrier assembly (14) to axle housing assembly (6).
Illustration 16 g06048030
Use Tooling (F) to install retaining ring (12) on axle shaft (13). Install retaining ring (12).
Illustration 17 g06048024
Install plug (11), O-ring seal (10), spring pin (9), and pin (8). Tighten plug (11) to a torque of 60 6 N m (44.2 4.4 lb ft).
Illustration 18 g06047996
Remove axle housing assembly (6) from Tooling (A).
Illustration 19 g06057330
Attach Tooling (B) and a suitable lifting device to install axle housing assembly (6). The weight of axle housing assembly (6) is approximately 363 kg (800 lb).
Apply tooling (J) on the mating surfaces of axle housing assembly (6) and the differential housing.
Install axle housing assembly (6) onto axle assembly (5). Install bolts (7) to a torque of 300 40 N m (220 30 lb ft).
Repeat Steps 1 through 32 for the remaining axle