Here's a general overview of the process, but remember this is NOT a substitute for a proper repair manual:
I. Master Cylinder:
* Checking: Look for leaks around the master cylinder. If there are leaks, the cylinder needs replacement. Also check the brake fluid level in the reservoir; consistently low fluid indicates a leak somewhere in the system. You can also check for a spongy brake pedal, which could indicate a failing master cylinder. Never rely solely on visual inspection for brake system issues.
* Replacing:
1. Safety First: Disconnect the battery negative terminal.
2. Bleeding the System: Completely bleed the brakes before removing the master cylinder to avoid air getting into the system.
3. Fluid Drainage: Place a drain pan under the master cylinder to catch the brake fluid.
4. Disconnect Lines: Carefully disconnect the brake lines from the master cylinder. Be prepared for brake fluid spillage. Use appropriate containers to catch the fluid and dispose of it properly.
5. Remove the Master Cylinder: This often involves removing mounting bolts and possibly some other components depending on your year and model. Refer to your repair manual for precise instructions.
6. Installation: Install the new master cylinder in reverse order of removal, ensuring all lines and bolts are securely tightened. Use new crush washers on the brake lines.
7. Bleeding the Brakes: Thoroughly bleed the brakes after installation to remove any air from the system. This is crucial for proper brake function.
II. Slave Cylinder (Clutch Cylinder):
* Checking: The slave cylinder is part of the clutch system and is located at the transmission. Check for leaks around the slave cylinder. A failing slave cylinder can result in a clutch that slips or doesn't engage properly.
* Replacing:
1. Safety First: Disconnect the battery negative terminal.
2. Drain Transmission Fluid: Drain some transmission fluid to reduce the mess.
3. Disconnect Hydraulic Line: Carefully disconnect the hydraulic line from the slave cylinder.
4. Remove the Slave Cylinder: The process depends on the car's design. You might need to remove some transmission components to access it. Consult your repair manual for specific instructions.
5. Installation: Install the new slave cylinder, making sure the hydraulic line is securely reconnected. Make sure to bleed the clutch hydraulic line to remove any air bubbles (this process often involves using a bleed screw on the slave cylinder and a helper to operate the clutch pedal).
6. Refill Transmission Fluid: Refill the transmission with the appropriate fluid to the correct level.
Important Considerations:
* Brake Fluid is Corrosive: Use appropriate safety glasses and gloves when working with brake fluid.
* Bleeding Brakes Properly is Critical: Incorrect bleeding can lead to a spongy brake pedal and dangerous driving conditions.
* Repair Manual is Essential: This information is generalized. Your year and model Laser will have specific procedures. Get a repair manual tailored to your specific vehicle.
* Professional Help: If you're uncomfortable working on your braking system, take your Laser to a qualified mechanic. Brake system failure is extremely dangerous.
Remember, working on your brakes and clutch is serious business. If you're not experienced, it's best to leave this work to a professional. Improper repair could result in significant injury or death.
