Caliper And Disc Brake Inspection Guide for NOV TDS11SA

Step-by-Step Procedure:

1. **Visual Inspection:**

  - **Brake Pads**: Check the thickness of the brake pads. They should be above the minimum thickness specification. Look for uneven wear.

  - **Caliper**: Inspect the caliper for any visible damage, corrosion, or leaks around the seals.

  - **Disc Brake (Rotor)**: Examine the surface of the rotor for scoring, cracking, or warping. Look for any discoloration that might indicate overheating.

2. **Check Caliper Function:**

  - **Movement**: Manually check that the caliper slides smoothly along its guide pins. If it sticks, it may need lubrication or replacement.

  - **Piston Movement**: Using a caliper tool, press the brake pedal to engage the pistons and see if they move in and out freely. If the pistons do not engage correctly, they may need servicing or replacing.

3. **Check Brake Fluid:**

  - **Fluid Level**: Check the brake fluid reservoir to ensure it’s at the appropriate level. If it's low, top it off with the recommended brake fluid type.

  - **Condition of Fluid**: Inspect the brake fluid for contamination or discoloration. If the fluid looks dark or has particles, it may need to be replaced.

4. **Brake Pad Thickness:**

  - Use a caliper gauge to measure the thickness of the brake pads. Compare with manufacturer specifications. Pads below the minimum thickness should be replaced.

5. **Rotor Specifications:**

  - **Runout Measurement**: Use a dial indicator to measure rotor runout at various points on the rotor. Excessive runout may indicate that the rotor is warped.

  - **Thickness Measurement**: Measure the rotor thickness using a micrometer or caliper. Ensure it meets the manufacturer's specifications.

6. **Test Functionality:**

  - **Pressure Test**: With the truck back on the ground, press the brake pedal and listen for abnormal sounds. Check if the vehicle stops smoothly without pulling to one side.

  - **Road Test**: Perform a low-speed test drive to evaluate braking efficiency and hear for any unusual noises from the calipers or rotors.

Caliper, Disc Brake   OEM#109528     EVERGROW#164292