BOLT 1D4680 - Caterpillar

Remove & Install Flywheel
1. Fasten a hoist to flywheel (1) with tooling (A).2. Remove two bolts (2) and install two 1" -14 NF guide bolts 11 inches long in their place. Remove the remainder of bolts (2) and remove flywheel (1). The weight of the flywheel is 167 kg (370 lb). The following steps are for the installation of the flywheel.3. If the flywheel ring gear is damaged, a replacement can be made as follows:a. remove the damaged ring gear from the flywheelb. Heat the new ring gear to a maximum temperature of 316°C (600°F) and install it on the flywheel so the chamfer of the gear teeth will be toward the engine when the flywheel is installed.4. Install two 1" -14 NC guide bolts 11 inches long in the end of the crankshaft.5. Using a hoist and tooling (A), install flywheel (1) on the guide bolts. Make sure the mark on the flywheel is aligned with the mark on the crankshaft.6. Put clean engine oil on the threads of bolts (2). Install ten bolts (2).7. Remove the hoist, tooling (A) and the guide bolts. Install the remaining bolts (2) and tighten to a torque of 1150 60 N m (840 44 lb ft).