However, if your brakes are dragging or feel weak despite new shoes, here's what you should check and potentially adjust:
1. Verify Self-Adjusters are Working: The self-adjusters are internal mechanisms within the drum brake assembly. They rely on the brake shoes' return springs and the backing plate movement during braking to automatically adjust the shoe-to-drum clearance. A problem with these components (broken springs, seized parts, etc.) will prevent self-adjustment. This requires a partial or full brake drum disassembly to inspect.
2. Check for Brake Shoe Wear: If the brake shoes are excessively worn, they won't make sufficient contact with the drum, regardless of the self-adjuster's function. Replacement may be necessary.
3. Inspect the Brake Drums: If the drums are scored, rusted, or out of round, they'll prevent the shoes from contacting evenly. Resurfacing or replacement might be required.
4. Check the Wheel Cylinders: Leaking wheel cylinders can result in poor braking and necessitate replacement.
5. Check the Parking Brake: The parking brake mechanism is separate but connected to the brake shoes. Make sure the parking brake isn't partially engaged, causing drag.
How to check the self-adjuster (requires partial disassembly):
To gain access, you'll need to:
1. Remove the wheel.
2. Remove the brake drum. This may require some persuasion; sometimes a rubber mallet is needed to break the drum free. Be gentle to avoid damaging the drum.
3. Inspect the self-adjuster mechanism. This is usually a ratchet mechanism. Look for broken springs, seized components, or excessive rust. A small amount of movement should be achievable with a screwdriver or similar tool (carefully!).
If you suspect a problem with the self-adjuster:
* The best course of action is to consult a repair manual specific to your '89 Ford Probe. This manual will provide detailed diagrams and instructions.
* You may need to replace the entire wheel cylinder assembly, as the self-adjuster is often integrated.
Important Safety Notes:
* Never work on your brakes unless you're comfortable and knowledgeable. Brake failure can have serious consequences.
* Use appropriate safety glasses and gloves.
* After completing any brake work, always have your brakes checked by a qualified mechanic to ensure they're functioning correctly.
Attempting to manually adjust the brake shoes without understanding the self-adjusting mechanism is strongly discouraged. Focusing on diagnosing the reason for poor braking performance, rather than trying to force an adjustment, is the safer and more effective approach.
