Here's a general overview of how to adjust rear drum brakes on a 1998 Silverado. Specific steps may vary slightly depending on your exact model and trim. Always consult your vehicle's repair manual for precise instructions and diagrams.
Tools You'll Need:
* Socket wrench set (likely including 10mm, 13mm, and possibly others)
* Screwdriver (possibly Phillips and flathead)
* Wheel chocks
* Jack and jack stands (Safety First: Always properly secure the vehicle)
* A small flathead screwdriver or brake adjuster tool (sometimes a specialized tool is recommended)
* Penetrating lubricant (like PB Blaster)
Steps (General Outline):
1. Safety First: Park on a level surface, engage the parking brake, and chock the front wheels. Use jack stands to safely lift the rear of the truck. Never work under a vehicle supported only by a jack.
2. Remove the Wheel: Remove the lug nuts and carefully take off the wheel.
3. Locate the Adjuster: The adjuster is usually a star-wheel or similar mechanism located behind the backing plate (the metal plate covering the drum). You might need to partially remove the backing plate (some have access holes) to access the adjuster.
4. Clean the Area: Use a wire brush or brake cleaner to remove any rust or debris from the adjuster and surrounding areas. Apply penetrating lubricant if necessary.
5. Adjust the Brakes: This is the trickiest part. You'll need to turn the adjuster. The direction of rotation depends on your specific setup; some rotate clockwise to tighten, others counterclockwise. Turning the adjuster will tighten the shoes against the drum. You'll typically feel resistance as you turn it.
6. Test the Adjustment: Turn the wheel by hand. You should feel some resistance, indicating the brakes are engaging. The wheel should not be hard to turn. If it's too hard, you've adjusted them too tightly. If it's too easy, they're too loose. You may need to carefully readjust several times until you find the sweet spot.
7. Reinstall the Wheel: Once you've achieved the proper adjustment, carefully put the wheel back on, and tighten the lug nuts in a star pattern.
8. Lower the Vehicle: Lower the vehicle to the ground.
9. Test Drive: Test drive the vehicle to verify the brakes are working properly. If you notice anything unusual (like pulling to one side), you may need to re-adjust or investigate further.
Important Considerations:
* Automatic Adjusters: Some vehicles have self-adjusting brakes. These typically adjust automatically as you use the brakes. If you have this type, you may not need manual adjustment. Check your owner's manual.
* Brake Shoes: If the brake shoes are worn excessively, you'll need to replace them. Adjusting the brakes won't fix worn-out shoes; it will just temporarily improve braking until they are replaced.
* Repair Manual: A factory service manual is the best resource. It will have specific diagrams and instructions for your vehicle.
This is a general guideline. Improper brake adjustment can be dangerous. If you are not comfortable performing this procedure, take your Silverado to a qualified mechanic. Your safety is paramount.
