Chevrolet Trax: Front brake caliper overhaul
Disassembly Procedure
WARNING: Refer to Brake Dust Warning .
WARNING: Refer to Brake Fluid Irritant Warning .
WARNING: Use of eye goggles is necessary to prevent personal injury.
CAUTION: Refer to Brake Fluid Effects on Paint and Electrical
Components Caution
- Remove the brake caliper from the vehicle. Refer to Front Brake Caliper
Replacement.
Fig. 34: Using Low Pressure Compressed Air To Remove Brake Caliper Piston
WARNING: Do not place fingers in front of the caliper piston(s) in
an attempt to
catch or protect it when applying compressed air. The piston(s) can
fly out with force and could result in serious bodily injury.
CAUTION: Use clean cloths to pad interior of caliper housing during
piston
removal. Use just enough air to ease the pistons out of the bores. If
the pistons are blown out, even with the padding provided, it may be
damaged.
Fig. 35: Exploded View Of Brake Caliper
- Remove the brake caliper piston from the caliper bore by directing low
pressure compressed air into the
caliper (1) through the fluid inlet hole.
- Remove the piston dust boot seal (1) from the seal counterbore in the
caliper (4). Discard the boot seal.
- Using a small wooden or plastic tool, remove the piston seal (3) from
the caliper bore. Discard the piston
seal.
- Remove the bleeder valve cap (6).
- Remove the bleeder valve (5).
NOTE: Do not use abrasives to clean the brake caliper piston.
- If cracks, scoring, pitting, excessive rust, and/or excessive corrosion
are present in the caliper bore,
replace the caliper assembly.
- If light rust or light corrosion are present in the caliper bore,
attempt to remove the imperfection with a
fine emery paper. If the imperfection cannot be removed, replace the caliper
assembly.
- Clean the brake caliper piston bore and seal counterbore, and the
caliper piston with denatured alcohol, or
equivalent.
- Dry the caliper piston bore and counterbore, and the piston with non-lubricated,
filtered, compressed air.
- Inspect the caliper piston for cracks, scoring, and/or damage to the
plating. Replace the caliper piston if
any of these conditions exist.
- Inspect the caliper mounting holes for cracks, scoring, pitting, rust
and/or excessive corrosion. Replace
the caliper assembly if any of these conditions exist.
Assembly Procedure
Fig. 36: Exploded View Of Brake Caliper
- Lubricate the new piston seal (3) with brake fluid from a clean, sealed
brake fluid container.
- Install the lubricated, new piston seal into the caliper bore.
- Apply a thin coat of brake fluid from a clean, sealed brake fluid
container.
Fig. 37: View Of Caliper Piston And Caliper Piston Dust Boot Seal
- Install the new piston dust boot seal (1) over the caliper piston (2).
- Install the bottom half of the caliper piston into the caliper bore.
- Compress the caliper piston to the bottom of the caliper bore.
- Fully seat the piston dust boot seal into caliper counterbore.
CAUTION: Refer to Fastener Caution .
- Install the bleeder valve to the caliper and tighten to 17 (13 lb ft).
- Install the bleeder valve cap.
- Install the brake caliper to the vehicle. Refer to Front Brake Caliper
Replacement.
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
Special Tools
CH-41013 Rotor Resurfacing Kit
CH-42450-A Wheel Hub Resurfacing Kit
For equivalent regional tools, refer to Special Tools.
Removal Procedure
WARNING: Refer to Brake Dust Warning .
SEE MORE:
Fig. 314: Crankshaft Position Sensor, Bolt And Seal Ring
Remove the crankshaft position sensor bolt (3).
Remove the crankshaft position sensor (1) and the crankshaft position
sensor seal ring (2).
Fig. 315: Outer Crankshaft Bearing Cap Tie Plate Bolts
Remove and DISCARD the 12 outer cran
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.
Diagnostic Fault