BACK-UP RING 4620909 - Caterpillar

Required Tools and Installation Procedure
Table 1
Required Tools    
FT-2806     Alignment Tool    
Ensure that all parts and surfaces of the engine block are clean and free from oil, grease, and dirt.
Illustration 1 g00829702
Typical installation of the new rear housing assembly (1) Crankshaft flange (2) Plastic sleeve (3) Rear housing assembly (4) Alignment tool (5) BoltsNote: The crankshaft rear seal is lubricated. There is no need to lubricate the seal or the crankshaft flange before installation.
Place rear housing assembly (3) on crankshaft flange (1) until the rear housing assembly contacts the cylinder block face. Plastic sleeve (2) will push out of the rear housing assembly. Discard the plastic sleeve after the rear housing assembly is installed.
Place alignment tool (4) over rear housing assembly (3). This will center the rear housing assembly onto the crankshaft flange.
Illustration 2 g00830867
Install bolts (5) with alignment tool (4) in position in order to fasten rear housing assembly (3) to the cylinder block. Tighten bolts 1 and 2 to a torque of 22 N m (16 lb ft).
Remove alignment tool (4). Tighten the remaining bolts in sequence to a torque of 22 N m (16 lb ft).