GEAR AS-SUN 6Y5952 - Caterpillar

Remove Flywheel
1. Remove cover (1) from flywheel housing. Remove pointer from flywheel housing. 2. Remove two bolts (2) that hold flywheel in position on crankshaft. Install two 7/8"-14 NF 8 in. long bolts as a guide, on D379 & D398. On D399 only, use two 1"-14 NF x 10 in. long bolts as a guide.3. Install tooling (A) on the flywheel. Remove the remainder of the bolts that hold flywheel to crankshaft.4. Remove the flywheel. For D379 and D398, weight of the flywheel is 450 lb. (204 kg). For D399 only, weight of flywheel is 550 lb. (249 kg).Install Flywheel
1. For D379 and D398, install two 7/8"-14 NF x 8 in. long bolts (1) as a guide, in the crankshaft. On D399 only, install two 1"-14 NF x 10 in. long bolts as a guide. 2. Use a hoist and tooling (A) to put the flywheel in position on crankshaft.3. Install the bolts that hold flywheel to crankshaft. Tighten bolts on D379, D398 to a torque of 450 30 lb. ft. (610 40 N m). On D399 only, tighten bolts to a torque of 670 50 lb. ft. (905 70 N m).4. Remove tooling (A) from flywheel. 5. Install pointer (2) in flywheel housing. Install cover on flywheel housing.