Braking is a corollary of energy generated in the master cylinder.
The master cylinder is an integral part of the braking system in your car. When you press down on the brake pedal, you create force. The master cylinder takes that force and converts it into hydraulic pressure that powers the brakes on your car. There are two basic parts to the master cylinder: a reservoir, where the break fluid goes, and a piston and cylinder system where pressure can be generated. A master cylinder rebuild kit is needed to refurbish a master cylinder.
Instructions
Remove the Master Cylinder
1. Locate the reservoir lines.
Clean the Master Cylinder
10. Use brake cleaner to clean out the cylinder.11.Pull the lines off carefully.
3. Find the appropriate wrenches for your model of car to unhook the brake lines. If you have a line wrench in the correct size, choose that to remove the lines.
4. Remove the brake lines. Fluid may drain from the lines after you remove them.
5. Drain the fluid from the reservoir. You can try to suck most of the fluid out of it before removal by using a turkey baster. If you choose to remove the unit then drain it, be careful to not spill brake fluid on painted surfaces.
6. Use a socket to remove the two mounting bolts which hold the master cylinder in place. Remove the master cylinder.
Disassemble the Master Cylinder
7. Use snap ring pliers to remove the snap ring which holds the rest of the assembly inside the master cylinder.
8. Remove the rest of the parts from the master cylinder.
9. Track the order in which the parts come out of the master cylinder You will have to reassemble it in the exact same way. The different types of master cylinders means that the parts can differ slightly, so you need to pay attention to each cylinder you take apart.
These are the lines leaving the master cylinder which are attached with hose clamps2. Disconnect the reservoir lines. Loosen the hose clamps with a flat screwdriver.
Blow the unit dry with low pressure air.
12. Check for scratches on the inside of the cylinder. If there are shallow scratches, you will have to hone the cylinder with a honing tool. If there are any deep scratches, cracks or gouges on the cylinder, the job is done. You must throw the cylinder away and replace it with a new part. Do not attempt a rebuild.
Rebuild the Master Cylinder
13. Replace the O-ring in the reservoir. Be careful not to over tighten the clamp that connects the reservoir to the master cylinder.
14. Put back each part in the order that you took it out of the cylinder. Use the part provided in the rebuild kit to replace each original part that you removed from the cylinder. This will at least include a new rubber cup, spring and piston. Many more parts may be included depending on the type of cylinder, and the type of rebuild kit that was purchased. Make sure that you replace every part that you removed with its corresponding part from the rebuild kit.
15. Seal the new assembly in place with the new snap ring from the rebuild kit.
16. Remount the master cylinder.
