Genuine Mercedes-Benz 190E Brake Master Cylinder

Mercedes-Benz 190E Brake Master Cylinder Parts and Q&A

• Master Cylinder
  005-430-26-01-64
  Q: How to remove, overhaul, and refit of the Brake Master Cylinder on Mercedes-Benz 190E?

  A:

  You should know the hazards of hydraulic fluid before working on them. The first step should be to remove the battery negative terminal and the wiring connector on the level informer of brake fluid from the unit. Take out the master cylinder reservoir cap and siphon hydraulic fluid out of the reservoir, or open a bleed screw and press the brake pedal to pump the fluid out. When needed, remove the fluid hoses on the reservoir and seal off the ends in order to reduce leakage of fluids. Take your time when loading out the fluid reservoir of the master cylinder, do not touch the seals and seal the ports of the cylinder to avoid dirt infiltration. Clean up around the brake pipe unions, lay absorbent rags below them, record their correct locations, remove a union nut and take out the pipes, covering or taping the ends with rags to as much effect as possible not to lose the liquids or bring them inside. spindle and....... lifted away and then the two nuts and washers attaching the master cylinder to the vacuum servo unit, raising the unit up, take care not to tip over. Prior to assembling the master cylinder parts, verify the supply of spare parts as there are two types installed. Wipe the body of the master cylinder and the mounting seals on the fluid reservoir and record their proper locations. Hold the master cylinder body using a vice, and just press the piston in the cylinder to retract the secondary piston retaining pin. Download the piston with CIRclip, washer, and sealing ring, then take out the primary piston assembly and spring, and next the second piston and the spring, be notice of orientation. Wipe every part with appropriate cleaning pans even without using liquid based solvents and wipe them instantly. Inspect all parts of the design to determine if they are in good condition or worn or damaged, especially the cylinder bores, the pistons, etc., renewing those parts not in good condition. Just in case of the assembly is still usable, then get a repairing kit and re-do all the disrupted seals. Pre-pretreat the piston assemblies and new seals with clean hydraulic fluid and slide clean fluid into the cylinder bore during reassembly. Bend the spring to the secondary piston assembly and insert it by the master cylinder body with care not to entrap the piston seals. Place the secondary piston slot in place, slide it in place and then attach it with the retaining pin. Install the new primary piston assembly, and, where needed, install a new sealing ring at the end of the master cylinder and reinstall the washer and circlip, putting the circlip in the proper position. Insert the seals of the new fluid reservoir into the ports of the master cylinder. clean the mating-faces of the master cylinder and servo unit, replace old sealing ring on rear of master cylinder body and connect the master cylinder to servo unit, fitting them so they meet. Inspect (by refitting and tightening) the master cylinder retaining nuts, clean brake pipe unions and refit them to the master cylinder ports, and handfasten as directed. Then place the fluid reservoir in place and reconnect the fluid hoses as needed. Fill the master cylinder tank with new fluid and bleed the hydraulic system thoroughly, as the braking system has been tried and hence the car is ready to enter service again.