Wheel - Mounting Surface Distorted Lug/Pilot Holes

91ford19

Article No.
91-11-16

05/30/91


^ WHEEL - DISTORTED PILOT HOLES OR LUG HOLES - WITH 16 X 6 SINGLE STEEL WHEELS

^ VIBRATION - WHEEL MOUNTING SURFACE DISTORTED - WITH 16 X 6 SINGLE STEEL WHEELS


LIGHT TRUCK: 1985-91 E-250-350, F-250-350


ISSUE: Wheel vibration may be caused by distorted pilot holes or lug holes on the wheel. This does not allow sufficient clamp load between the lug nut, the wheel and the rotor/hub. It may also be difficult to remove the distorted wheel from the vehicle or to place the wheel on the vehicle in a different location.

ACTION: To determine if a wheel has been damaged and should not be reused, refer to the following service procedure for details.


NOTE: THIS PROCEDURE ONLY APPLIES TO PART # E7UA-1015-JA (16 X 6 SINGLE STEEL WHEEL)

INSPECT FOR WHEEL DAMAGE

1. Remove the wheel from the hub. If the wheel is difficult to remove, DO NOT reuse the wheel.

2. Visually inspect the wheel for distortion (turned-up) scallops in the pilot hole. If the pilot hole is distorted, DO NOT reuse the wheel.

3. Inspect the distorted lug holes by placing a lug nut in the lug hole cone seat of the wheel and inspect from the reverse side. If the lug protrudes through the lug hole, DO NOT reuse the wheel.

4. Inspect the wheel mounting surface for distortion.

a. Lay a straight edge across the mounting surface of the wheel (the surface of the wheel which makes contact with the rear brake drum or front rotor).

b. The straight edge should contact the outer edge of the mounting surface, lying between the bolt holes and across the center of the pilot hole.


c. The clearance between the straight edge and the pilot hole can not exceed 0.0300 inch, the straight edge should not contact the pilot holes. If the clearance is more than 0.0300 or the straight edge makes contact with the pilot holes, DO NOT reuse the wheel.

INSTALL WHEEL

1. Inspect for lubricants on the studs and lug nuts.

2. If lubricants are present, clean throughly using naphtha or equivalent.

3. Torque lug nuts to (140 ft.lbs./190 N-m) using a torque wrench according to the Shop Manual, Section 04-04.

CAUTION: EXCESSIVE TORQUE MAY CAUSE DISTORTION OF THE WHEEL. INADEQUATE TORQUE MAY NOT PROVIDE ADEQUATE CLAMPING FORCE TO ASSURE WHEEL RETENTION.


PART NUMBER PART NAME CLASS

E5TZ-1015-B Wheel AM

OTHER APPLICABLE ARTICLES: NONE
WARRANTY STATUS: Eligible Under Basic Warranty
Coverage
OPERATION DESCRIPTION TIME
911116A Wheel-Inspect 0.7 hrs
911116B Replace One Wheel And 0.4 Hr.
Dynamic Balance
911116C Replace Two Wheels And 0.8 Hr.
Dynamic Balance
911116D Replace Three Wheels And 1.2 Hr.
Dynamic Balance
911116E Replace Four Wheels And 1.6 Hr.
Dynamic Balance
DEALER CODING
BASIC PART NO. CONDITION CODE
1015 67
OASIS CODES: 306000, 703000