Section 03-01D: Engine, Diesel, 7.3L | 1996 F-Series Workshop Manual |
The flywheel used on the 7.3L diesel engine equipped with a manual transmission is known as a dual mass flywheel. The purpose of the dual mass flywheel is to provide one inertia mass connected directly to the engine crankshaft (6303) and a second inertia mass connected through the clutch system to the transmission (7003). The dual mass flywheel provides the same functions as a conventional flywheel, with mounting provisions for the starter ring gear, pilot bearing, clutch pressure plate and disc mounting location.
The first inertia mass provides sustaining energy to maintain engine (6007) operation between the times that the cylinders fire and maintains smooth power delivery.
The second inertia mass provides sustaining energy to the transmission.
Between these two inertia masses a series of springs and friction elements provide smooth, quiet operation and a torque limitation function to protect the drivetrain from impact shock.
The bearing used to mount the second inertia mass onto the first requires no lubrication.
Dual Mass Flywheel
| Item | Part Number | Description |
|---|---|---|
| 1 | 6379 | Flywheel Attaching Bolt (10 Req'd) |
| 2 | 6A366 | Flywheel Reinforcing Plate |
| 3 | 6477 | Primary Flywheel |
| 4 | — | Crankshaft Flange (Part of 6303) |
| 5 | 6384 | Flywheel Ring Gear |
| 6 | — | Secondary Flywheel (Part of 6477) |
| 7 | — | Secondary Flywheel Bolts with Washers (6 Req'd) (Part of 6477) |
| 8 | 7600 | Pilot Bearing |