Pilot Runout

1. Install Dial Indicator with Bracketry to the disc brake rotor pilot, as close to the axle flange face as possible. Zero the indicator to allow the pointer to deflect either way.
2. Rotate the axle shaft one full turn and note the maximum and minimum readings. The difference between the maximum and minimum readings will be the total disc brake rotor pilot runout. Drum pilot runout should not exceed 0.15 mm (0.006 inch).