Genuine Mazda 626 Wheel Cylinder

Mazda 626 Wheel Cylinder Parts and Q&A

• Wheel Cylinder
  GJ21-26-610D
  Q: How to remove and overhaul a wheel cylinder on Mazda 626?

  A:

  The first thing to do to take off the wheel cylinder is to raise the back of the car and then place it in jackstands. Then loosen the brake shoe assembly and wash all the dirt and foreign matter around the wheel cylinder. Unscrew and snap the fluid inlet tube, unscrew the retaining bolts of the wheel cylinder, and detach the wheel cylinder to the brake backing plate and put the wheel cylinder on a clean work bench. To do the overhaul, get a rebuild kit of wheel cylinder in a dealer or parts store. Loose the bleeder screw and steel ball, tapping the wheel cylinder body on a piece of wood, should the ball get stuck. Remove dust boots and pistons in the cylinder bore and divide the boots and the piston assembly. Pull at one end of the piston to take the rubber cups and piston block out of the cylinder body. Wipe the wheel cylinder using brake fluid, denatured alcohol or brake system cleaner but not solvents made of petroleum. Blow down the passages with compressed air. Inspect the cylinder bore, does it have corrosion or scoring; any light corrosion can be eliminated using crocus cloth, and in case of corrosion, which can be removed with ease or the bore is scored, change the cylinder. Apply clean brake lubricant to the new seals and cylinder bore, put the piston components together, and then fit the assembly into the piston making sure the boots are correctly positioned. Fit the steel ball and bleeder screw. Installation To install, screw the fluid inlet nut into the cylinder finger tight, and then screw the wheel cylinder into the nut. Install the retaining bolts and ensure that they are firmly tightened, install the inlet nut, and fit the brake shoe assembly. Lastly, release the brakes and lower the car.