How to check brake master cylinder

Open the hood of the car. Locate the side with the brake fluid and remove the sensor low alarm level. Unscrew and remove the sensor. Open the reservoir cap and using a rubber bulb siphon liquid. Pay attention to the fact that she brake fluid is highly toxic. You need to wear gloves to cook a small amount of water. When getting brake fluid on car paintwork the paint can oblasti. If this happens, you should immediately wash the traces of liquid water.

Take the key "to 10" and remove the brake tubes. Pull the tube from the brake master cylinder.

Disconnect the cylinder from the vacuum amplifier. To do this, use a key or a swivel head "by 17". Disconnecting the brake master cylinder side and the brake fluid, start his examination. Disassemble the cylinder, check the mirror for scratches and other defects. Please note on the elasticity of the spring, clean the surface of the working piston. Do not touch parts with mineral fluids. Inspect the rubber seals. To avoid deformation of rubber parts, rinse and dry them with compressed air, not exceeding a set manufacturer time 20-25 sec.

If there are suspicions that the sealing design of the main brake cylinder, use the stand for testing. Opening and closing of the valve cylinder, rotate the flywheel, forcing the movement of pistons. Continue the rotation and keep the pressure in the cylinder. As soon as it becomes work, stop and note the time. The working pressure of the cylinder shall be stored not less than 5-7 seconds. If the observed fluid leakage and rapid drop in pressure, the tightness is impaired.