Chevrolet Trax: Brake drum refinishing
Special Tools
- CH-41013 Rotor Resurfacing Kit
- CH-42450-A Wheel Hub Resurfacing Kit
For equivalent regional tools, refer to Special Tools.
WARNING: Refer to Brake Dust Warning .
- The brake drums do not require refinishing as part of routine brake
system service. Do not refinish brake
drums in an attempt to correct the following conditions:
- Brake system noise (squeal, growl, groan)
- Uneven and/or premature brake lining wear
- Superficial or cosmetic corrosion/rust of the brake drum surface
- Scoring of the brake drum surface (less than the maximum allowable
specification)
- Brake drums should only be refinished if the following conditions exist:
- Excessive corrosion/rust and/or pitting
- Cracks and/or heat spots
- Excessive blueing discoloration
- Scoring of the brake drum surface (in excess of the maximum allowable
specification)
- Radial runout in excess of the maximum allowable specification
- Inspect each of the brake drums and determine if the brake drums can be
refinished and remain within the
maximum allowable diameter after refinish specification:
- With the tire and wheel assemblies removed, measure the diameter of each
of the brake drums.
Refer to Brake Drum Diameter Measurement.
- Inspect each of the brake drums for excessive surface wear and/or radial
runout. Refer to Brake
Drum Surface and Wear Inspection.
- If the brake drums can be refinished, proceed with the rotor refinishing
procedure.
- If necessary, use the CH-41013 rotor resurfacing kit in order to
thoroughly clean any corrosion/rust from
the brake drum flange.
- Mount the brake drum to the brake lathe according to the lathe
manufacturer instructions.
- Ensure that any vibration dampening attachments are securely in place.
- With the brake lathe running, slowly bring in the cutting tool until it
just contacts the brake drum friction
surface.
- Observe the witness mark on the brake drum. If the witness mark extends
approximately three-quarters or
more of the way around the brake drum surface, the brake drum is properly
mounted to the lathe.
- If the witness mark does not extend three-quarters or more of the way
around the brake drum, re-mount
the brake drum to the lathe.
- Following the brake lathe manufacturer instructions, refinish the brake
drum.
- After each successive cut, inspect the brake drum diameter. Refer
to Brake Drum Diameter
Measurement.
- If at any time the brake drum exceeds the maximum allowable diameter
after refinish specification, the
brake drum must be replaced.
- After refinishing the brake drum, use the following procedure in order
to obtain the desired nondirectional
finish:
- Follow the brake lathe manufacturer's recommended speed setting for
applying non-directional
finish.
- Using the 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 the friction surface of
the brake drum with denatured
alcohol or an equivalent brake cleaner and wipe the friction surface using a
clean shop towel to
remove metal particles remaining from machining. Repeat the cleaning process
if necessary to
remove all metal particles.
- Remove the brake drum from the brake lathe.
- If necessary, use the CH-42450-A wheel hub resurfacing kit in order to
thoroughly clean any corrosion
from the wheel bearing flange.
READ NEXT:
Removal Procedure
WARNING: Refer to Brake Dust Warning .
Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle
.
Remove the tire and wheel assembly. Refer to Tire and Wheel Remo
Removal Procedure
WARNING: Refer to Brake Dust Warning .
Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle
.
Remove the tire and wheel assembly. Refer to Tire and Wheel Remo
Removal Procedure
WARNING: Refer to Brake Dust Warning .
Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle
.
Remove the tire and wheel assembly. Refer to Tire and Wheel Remo
SEE MORE:
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transfer
eligibility information. The Advisor
can assist in canceling or removing
account information.
Selling/Transferring the
Vehicle
Call 1-888-4-ONSTAR immediately
to terminate your OnStar services if
the vehicle is disposed of, sold,
transferred, or if the lease ends.
Diagnostic Instructions
Perform the Diagnostic System Check - Vehicle prior to using this
diagnostic procedure.
Review Strategy Based Diagnosis for an overview of the diagnostic
approach.
Diagnostic Procedure Instructions provides an overview of each
diagnostic category.
DTC Descriptor
DT