HUB-INPUT 1321384 - Caterpillar

Flywheel And Ring Gear
Removal and Installation
PREPARING TO REMOVE THE FLYWHEEL
1-Bolts. 2-Cover.1. Remove the pointer under the cover (2).2. Remove two bolts (1), from highest and lowest positions and install guide pins (4). For D379 and D398 Engines use 7/8" NF and for D399 Engine use 1" NF guide pins.3. Remove the remaining bolts, carefully slide the flywheel onto the guide pins and attach a suitable hoist.4. Remove the flywheel and ring gear (3) from the housing as illustrated. Approximate weight 400 lbs. (181.4 kg).
REMOVING FLYWHEEL
3-Ring gear. 4-Guide pin.5. Press, cut or burn the ring gear from the flywheel, if replacement is necessary.6. Before installing a ring gear, clean both the ring gear and the flywheel. Remove all burrs that might interfere with seating the ring gear flush to the flywheel shoulder.7. Heat the ring gear (not to exceed 600°F) and install it. Electric or air starting replacement ring gear teeth are machined differently than the original equipment ring gear. The replacement gear with blunt teeth can be used for either rotation engines or for either starting system.With gasoline starting systems, the chamfer on the ring gear teeth must face toward the rear.8. Align the marks on the flywheel and the crankshaft flange and install the flywheel over the guide pins onto the crankshaft.9. Remove the guide pins and install the locks and bolts. Tighten the flywheel bolts evenly and diametrically to torque of 560-720 lb. ft. (77,4-99,6 mkg) for D399 Engines and 360-480 lb. ft. (49,8-66,4 mkg) for D379 and D398 Engines.Checking Flywheel Housing Face Runout
Make tool setup from parts of 8S2328 Dial Test Indicator Group.
CHECKING FLYWHEEL HOUSING FACE RUNOUT
A-Bottom. B-Right side. C-Top. D-Left side.1. Fasten a dial indicator to the crankshaft flange so the indicator anvil will touch the flywheel housing face.2. Pry the crankshaft to rear before taking readings at each point.3. With dial indicator set at .000 in. (0,0 mm) at point (A), rotate crankshaft and take readings at points (B), (C) and (D).4. The difference between the lowest and highest readings taken at all four points should not exceed .012 in. (0,304 mm), which is the maximum permissible flywheel housing face runout.Checking Flywheel Housing Bore Runout
Make tool setup from parts of 8S2328 Dial Test Indicator Group.1. Fasten the dial indicator to the crankshaft flange and adjust it to read .000 in. (0,0 mm) when the anvil is touching bore at point (1).2. Pry the crankshaft in such a manner to remove crankshaft main bearing clearance when taking readings at each point.3. Rotate crankshaft and take readings at points (2), (3) and (4).4. The difference between the lowest and highest readings taken at all four points should not exceed .012 in. (0,304 mm), which is the maximum permissible flywheel housing bore runout.
CHECKING FLYWHEEL HOUSING BORE RUNOUT
1-Bottom. 2-Right side. 3-Top. 4-Left side. If any method other than described here is used, always consider bearing clearances to obtain correct readings.Flywheel Housing
Removal and Installation
PREPARING TO REMOVE THE FLYWHEEL HOUSING
1-Cover. 2-Flywheel housing.1. Remove the aftercooler as described in the