F 250 4WD Pickup V8-4.6L SOHC VIN W (1998)
Flywheel: Component Tests and General Diagnostics
Clutch Surface
1. Use a fine grade sandpaper (400 grit) or if necessary, machine the flywheel surface to remove any defects. Make sure to not exceed the wear limit.
2. After machining, the flywheel must meet specifications:
1
Surface runout must not exceed 0.13 mm (0.005 inch) TIR, surface finish must be in the range of 4.0/1.3 micrometer (160/52 microinch).
2
The major diameter of any dowel pin must be below the new surface.
3
The clutch pressure plate retaining bolts must screw into the flywheel by hand to within 1.50 mm (0.06 inch) of the new surface.
Flywheel Check
1. Inspect flywheel for:
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Cracks.
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Heat checks or other damage.
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Machine friction surface of flywheel if scored or worn.
Flywheel Runout Check
