CYLINDER BLOCK GP 2777261 - Caterpillar

Start By:a. remove differentials and pinion assemblies The disassembly procedure is the same for the front and rear pinion assemblies. 1. Remove six bolts (1) and the washers that hold retainer (2) to the pinion housing. Remove the retainer. 2. Remove lip-seal (3) from retainer (2). 3. Bend crimp (4) away from the slot in the pinion shaft with a hammer and punch.4. Use Tool (A) to remove nut (5) from the pinion shaft. 5. Using a press, remove pinion shaft (6) from the pinion housing. 6. Remove bearing cones (8) and bearing cups (7) from the pinion housing.Assemble Pinion Assemblies
The same assembly is used for both the front and rear pinion assemblies. Cup freezing or cone heating may be used if cups or cones are reset with a driver or press after parts have reached a uniform temperature. Limit cone heating to 135°C (275°F) maximum for a maximum of 4 hours. Lubricate bearings after they have cooled to prevent rusting.1. Install bearing cups (8) and (10) in pinion housing (9). The bearing cups must be seated against the shoulders in pinion housing (9).2. Install bearing cone (7) on pinion (6). Bearing cone (7) must be against (seated) the shoulder on pinion (6). Lubricate bearing cone (7).3. Install pinion (6) in housing (9). Press bearing cone (11) into place leaving a small amount of end play. Lubricate bearing cone (11). Lubricate and install the washer and nut (5).4. Position the assembly vertically in a soft jawed vise. Tighten the vise against the teeth on pinion shaft (6). Install an appropriate size bolt and nut through an outer mounting bolt hole in pinion housing (9).5. Place a 203 mm (8.0 inch) torque wrench on this bolt so that it is in line with the center of pinion shaft (6).6. While turning pinion housing (9) with the torque wrench, tighten nut (5) until the torque wrench reading in the following chart is reached.
*When using a 203mm (8.0 inch) torque wrench.Check to be sure that there is zero end play of pinion shaft (6).7. If pinion rolling torque exceeds the specification, back off nut (5) 1/8 turn, and reseat bearing cone (11) and the washer against nut (5). Perform Steps 5 and 6 again. If any other length torque wrench is used, find the torque wrench reading by using the following formula: Where:"C" is the reading on the torque wrench (in N m)"B" is the length of the torque wrench (in N m)"A" is the bolt circle radius of the pinion housing (9) in meters and is equal to 0.135 m (5.31 inch)."T" is the rolling torque specification for pinion bearing preload which is 0.9 to 1.8 N m (8 to 16 lb inch).
Illustration A8. When the torque needed to turn the pinion is correct, stake nut (5) by peening the collar on the nut into the key slot in pinion shaft (6). See Illustration A for the correct tooling and dimensions. The nut may be reused if the collar is