OEM Cadillac STS Brake Disc

Cadillac STS Brake Disc Parts and Q&A

• Rotor
  15240719
  Q: How to replace the front brake disc on Cadillac STS?

  A:

  Begin the front brake rotor replacement by first raising and supporting the vehicle and then removing its tire and wheel assembly. When dismounting the brake caliper from its mount you need to use heavy mechanic wire or an equivalent to keep it supported and protect both the hydraulic flexible brake hose and prevent any leaking or damage to occur. You must never break the hydraulic brake flexible hose connection to the caliper. Locate and remove the assembly of brake caliper with caliper mounting bracket which needs to stay separate from the suspension knuckle but should maintain safe distance from hydraulic brake flexible hose tension. After marking the rotor position relative to wheel studs it is possible to remove both the rotor mounting screw and the brake rotor itself. The installer should use wheel hub resurfacing kit (J 42450-A) and rotor resurfacing kit (J 41013) to clean all rust and contaminants off the hub/axle flange and brake rotor mating surfaces before installation. Check each mating surface for the absence of foreign substances or debris. After placing the brake rotor onto the hub/axle flange while using the matchmark for correct orientation install the brake rotor mounting screw by tightening it to 14 n.m (124 lb in). After replacing the brake rotor measure its assembled lateral runout (LRO) to check disc brake performance and perform an adjustment when required. Reinstall the brake caliper assembly along with its bracket to the suspension knuckle before attaching the tire assembly with wheel replacement. Then after vehicle raising complete pad burnishing procedures (if needed) for rotor performance.
• Rotor
  88964102
  Q: What Tools Are Required to Service and Repair the Brake Disc, and What Steps Should Be Followed to Ensure Proper Refinishing on Cadillac STS?

  A:

  These tools serve to fix the Brake Disc: j 41013 rotor resurfacing kit and j 42450-a Wheel Hub resurfacing kit. You should check the disc thickness first to make sure it stays above the acceptable minimum limit before resurfacing. You need to refinish the Brake Disc when it shows thickness problems plus corrosion damage, fractures, or extreme surface marking. To fix cross-drilled discs maintain only use a lathe system that includes vibration control and positive tool angles. Use j 42450-a kit to scrape off rust from the hub/axle flange then j 41013 to remove rust from the Brake Disc. Install the Brake Disc on the lathe and make sure all connections are spotless before checking the mating surfaces for dirt particles. Arrange cutting tools on the lathe to touch disc surfaces and inspect the witness mark for the right positioning. Position the Brake Disc correctly based on lathe manufacturer guidelines before running the specified restoration process. Inspect the disc's metal after each cut for thickness standards before replacing it during the damage repair process. For non-directional finishing set the recommended speed and sand the disc using 120-grit aluminum oxide sandpaper when equipped with a non-directional tool or apply 150-grit sandpaper against a block if not. Wipe the brake contact areas with denatured alcohol or brake cleaner before taking the disc off the lathe machine to check its lateral runout measurement which requires adjustment when exceeding manufacturer limits for peak braking results.