Step | Action | Yes | No | ||||||
---|---|---|---|---|---|---|---|---|---|
DEFINITION: Lead/pull is the deviation of the vehicle from a straight path on a level road with no pressure on the steering wheel. Use the lead/pull correction table in order to verify that improper wheel alignment or worn components are not mistaken for tire lead. | |||||||||
1 | Road test the vehicle to verify the complaint. Select a smooth level surface to perform the test. Does the condition exist? | System OK | |||||||
2 | Inspect the tire/wheel assemblies for the following:
Do any of the above conditions apply? | ||||||||
3 | Repair/replace the tire/wheel assemblies as necessary. Is the repair complete? | -- | |||||||
4 | Inspect the front/rear suspensions for the following:
Do any of the above conditions apply? | ||||||||
5 | Repair/replace components as necessary.
Is the repair complete? | -- | |||||||
6 | Inspect the Brake system for Brake drag. Refer to Brakes Drag in Hydraulic Brakes. Do any of the above conditions apply? | ||||||||
7 | Repair/replace components as necessary. Is the repair complete? | -- | |||||||
8 | Inspect the steering gear valve for an unbalance. If this is the cause, steering effort will be very light in the direction of the lead and effort will be heavy in the opposite direction with the vehicle parked on a smooth level surface. Does the above condition apply? | ||||||||
9 | Replace the steering gear valve. Refer to Steering Gear Valve Replacement - Off Vehicle in Power Steering Systems. Is the repair complete? | -- | |||||||
10 | Inspect the wheel alignment. Refer to Wheel Alignment Measurement in Wheel Alignment. Is the wheel alignment in specifications? | ||||||||
11 | Adjust alignment to specifications. Refer to Wheel Alignment Measurement in Wheel Alignment. Is the repair complete? | -- | |||||||
12 |
Does the vehicle still lead/pull? | System OK | |||||||
13 | Does the vehicle lead/pull in the opposite direction? | Go to Radial Tire Lead/Pull Correction in Tires and Wheels | |||||||
14 | Verify proper system operation. Does the original condition still exist? | System OK |