Attachment III - Technical Information
TWO-PIECE LUG NUT REPLACEMENTINTERIM SERVICE ACTION - LUG NUTS
SERVICE PROCEDURE
1. Remove center cap (hubcap) from each wheel.
2. Tighten each lug nut in sequence shown in figure 1 to verify that the nut is at 100 lb-ft. A torque wrench should be used to ensure proper torque.
3. Tighten each lug nut again in sequence, an additional 1/8 to 1/4 turn.
4. Install center cap (hubcap) on each wheel.
TWO-PIECE LUG NUT REPLACEMENT
AFFECTED VEHICLES:
1997-1998 EXPEDITION/NAVIGATOR AND F-150/250
SERVICE PROCEDURE
The following service procedure must be performed on all four (4) wheels.
1. Remove center caps from wheels.
2. Loosen lug nuts on all four (4) wheels.
3. Raise vehicle on hoist.
4. Remove all lug nuts.
5. Remove tire and wheel assemblies.
6. With wire brush, clean back of wheel (brake rotor/drum mating surface) of any foreign material.
7. Inspect all wheel stud holes for damage (cracked or distorted).If cracked or distorted (if a penny can fit through the stud hole), the wheel must be replaced.
8. Inspect all studs. Replace if damaged.
9. Remove and discard hub 0-ring and any remaining pieces from the front and rear hubs.
10. Install wheel and tire assemblies.
NOTE:
Do not tighten lug nuts to final torque at this time.
11. Install new lug nuts and tighten enough to securely mate wheel against rotor/drum.
12. Lower vehicle and tighten lug nuts in sequence shown to 136 Nm (100 lb-ft). See Figure 4.
13. Install center caps.