W 100 Pickup L6-225 3.7L (1984)
LATERAL RUNOUT
Lateral runout is the movement of the rotor from side to side as it rotates on the spindle. This could also be referred to as "rotor wobble".
This movement causes the brake pad and piston to be knocked back into it's bore. This results in additional pedal travel and a vibration during
braking.
Checking Lateral Runout
1. Tighten the wheel bearings to eliminate all freeplay.
2. Attach a dial indicator to a solid non-rotating portion of the hub assembly or suspension.
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The point of the styles must contact the rotor face about 25 mm (1-inch) from the rotor edge.
3. Move the rotor one complete rotation and observe the dial indicator.
