GM 15635951
Brake Drum

Open the parking brake, lift the vehicle and hold it up with safety stands to proceed with the repairs. Remove the propeller shaft and after that, take out the nut and washer on a manual transmission or the bolt and washer on an automatic transmission. First, disconnect the drum and yoke assembly, then take off the bolts and washers and finally remove the drum from the yoke. During installation, join the drum to the yoke and make sure to tighten the bolts and washers using 37 nm (27 ft. Lbs.) of force. After that, set the drum and yoke in place and install the washer and nut (for manual) or the washer and bolt (for automatic) and secure them with the torque recommended. The last thing to do is fit the propeller shaft and bring the boat back down on the ground.

Start brake drum service with a micrometer to measure diameter. Refinish the brake drum only when the measurement does not exceed the maximum allowed diameter. Severe brake damage demands the Rotor Resurfacing Kit (J41013) to remove deep rust from the brake drum flange area. This kit prepares the flange properly for resurfacing and brake drum repair. Follow brake lathe manufacturer guidelines to refinish the brake drum and achieve excellent brake surface results that prevent bad stops. Follow the machining process by sanding the brake surface with 120 grit aluminum oxide sandpaper and wiping it down with brake parts cleaner product GM P/N 12377981 or an equal substitute.

Replace the brake drum instead of refinishing.

First, release the park brake.

Remove the bolt and washer.

Install the pin into the park brake lever.