Chevrolet Sonic Repair Manual: Brake Rotor Assembled Lateral Runout Correction - On Vehicle Lathe
Special Tools
CH-45101-100 Conical Brake Rotor Washers
For equivalent regional tools, refer to Special Tools.
Warning:
Refer to Brake Dust Warning.
Note:
- Brake rotor thickness variation MUST be checked before checking
for assembled lateral runout (LRO). Thickness variation exceeding the
maximum acceptable level can cause brake pulsation. Refer to Brake Rotor
Thickness Variation Measurement.
- Brake rotor assembled LRO exceeding the maximum allowable specification
can cause thickness variation to develop in the brake rotor over time,
usually between 4,800–11,300 km (3,000–7,000 mi). Refer to Brake Rotor
Assembled Lateral Runout Measurement.
- Ensure that the brake caliper and brake caliper bracket that are already
being supported, are clear from contacting any rotating components, such as
the brake rotor.
- Remove the CH-45101-100 conical brake rotor washers and the lug nuts
that were installed during the assembled LRO measurement procedure and/or the
indexing correction procedure.
- Inspect the mounting surface of the hub/axle flange and the brake rotor
to ensure that there are no foreign particles or debris remaining.
- Set up the lathe, following the manufacturer instructions.
- Refinish the brake rotor, following the brake lathe manufacturers instructions.
- After each successive cut, inspect the brake rotor thickness. Refer to Brake
Rotor Thickness Measurement.
- If at any time the brake rotor exceeds the minimum allowable thickness after
refinish specification, the brake rotor must be replaced. After replacing the
brake rotor, proceed to step 10.
- After refinishing the brake rotor, use the following procedure in order
to obtain the desired non-directional finish:
- Follow the brake lathe manufacturer recommended speed setting for applying
a non-directional finish.
- Using moderate pressure, apply the non-directional finish:
- If the lathe is equipped with a non-directional finishing tool, apply the
finish with 120-grit aluminum oxide sandpaper.
- If the lathe is not equipped with a non-directional finishing tool, apply
the finish with a sanding block and 150-grit aluminum oxide sandpaper.
After applying a non-directional finish, clean each friction surface of the
brake rotor with denatured alcohol, or an equivalent approved brake cleaner.
Remove the lathe from the vehicle.
Measure the assembled LRO of the brake rotor. Refer to Brake Rotor Assembled
Lateral Runout Measurement.
If the brake rotor assembled LRO measurement still exceeds the maximum allowable
specification, refer to Brake Rotor Assembled Lateral Runout Correction.
If the brake rotor assembled LRO is within specification, install the brake
caliper and depress the brake pedal several times to secure the brake rotor in place
before removing the CH-45101-100 conical brake rotor washers and the lug
nuts.
Special Tools
CH-45101-100 Conical Brake Rotor Washers
For equivalent regional tools, refer to Special Tools.
Warning: Refer to Brake Dust Warning.
Note:
Brake ro ...
Special Tools
CH-41013 Rotor Surfacing Kit
CH-42450-A Wheel Hub Resurfacing Kit
CH-45101 Hub and Wheel Runout Gauge
CH-45101-100 Conical Brake Rotor Washers
For equivalent regional tool ...
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