COUPLING-EXHAUST 6N5978 - Caterpillar

Illustration 1 g02570036
Rear view
Illustration 2 g02570037
Tightening sequence
Table 1
Specification for 272-0246 Flywheel Housing Gp
Item Qty Part Specification Description
- - - Before installation of the flywheel housing, inspect the front face of the flywheel housing and the rear face of the rear housing. The components must be free of the following substances: oil, fuel, water, assembly compounds, and any other contaminants.
- - - Check assembled installation depth of the crankshaft seal group with the crankshaft in any axial position.
- - - Use the following procedure to tighten the flywheel housing bolts. Tighten the bolts in the numerical sequence as shown in the Illustration 2.
1 2 245-3803 Bolt Tighten bolt (1) through bolt (2) to 55 10 N m (41 7 lb ft).
2 8 2H-6488 Bolt Tighten bolt (3) through bolt (10) to 135 20 N m (100 15 lb ft).
3 22 0L-1143 Bolt Tighten bolt (11) through bolt (32) to 47 9 N m (35 7 lb ft).
4 - - The seal driver must not contact the seal within the 177.80 0.25 mm (7.000 0.010 inch) diameter.
The seal and the sleeve of the crankshaft seal group must not be used if the seal and the sleeve have been separated.
A - - Distance from the sleeve to the seal is 6.55 to 6.15 mm (0.258 to 0.242 inch).
C - - Installation depth of the sleeve from the rear face of the crank shaft is 1.5 0.5 mm (0.06 0.02 inch).