OEM Scion xB Brake Master Cylinder

Scion xB Brake Master Cylinder Parts and Q&A

• Master Cylinder
  47201-12A22
  Q: How to remove the brake master cylinder on Scion xB?

  A:

  You should start brake master cylinder removal by draining brake fluid then cleaning all painted areas exposed to fluid. People should start by taking off the windshield wiper arm cover and continue with the front wiper arm and blade assembly removal on both sides of the vehicle. After removing the hood you should detach the hood to cowl top seal together with the right and left cowl top ventilator louvers and the front Wiper Motor and link. Next you should discard the outer cowl top panel followed by the air cleaner assembly. Detach the clutch reservoir tube by sliding off the clip to divide it. You should proceed by disconnecting the brake fluid level warning switch connector and the wire harness from the master cylinder then disengage the harness clamp from the wire harness clamp bracket before separating the two brake tubes from the brake master cylinder sub-assembly using a union nut wrench. First disassemble the two nuts followed by wire harness clamp bracket to extract both brake master cylinder sub-assembly and O-ring from the system. Work with care when handling the master cylinder because impacts must be avoided at all costs while also following a prohibition against using dropped master cylinders again. Vacuum pressure from the Brake Booster must be released before removing the component while placing the master cylinder in a horizontal position or tilted downward so the piston does not detach during installation or removal. Apply only lithium soap-based glycol grease with even layer around the piston's circumference by using a cloth for cleaning. However during this process always keep the master cylinder piston free from contamination.
• Master Cylinder
  47207-52041
  Q: How to install the brake master cylinder on Scion xB?

  A:

  Installation of the brake master cylinder begins with applying lithium soap base glycol grease on two new grommets which should be installed onto the brake master cylinder followed by attaching the cap and strainer to the reservoir then locking the stopper in place while verifying that both components fit properly into their grooves. To connect the brake master cylinder to the booster apply 2 nuts and torque them to 13 Nm (127 kgf-cm, 9 ft. lbs.). Then attach the 2 Brake Lines to the brake master cylinder by using Special Service Tool: 09023-00101 at 15 Nm (155 kgf-cm, 11 ft. lbs.) without the tool or 14 Nm (143 kgf-cm, 10 ft. lbs.) with it using a torque wrench with a fulcrum length of 30 cm (11.81 inch). To continue the procedure of brake pedal assembly installation, first hook up the level warning light switch connector followed by sliding this clip to connect the clutch reservoir tube for manual transaxle then install the air cleaner cap sub-assembly before adding brake fluid to the reservoir. Next, perform air bleeding on the brake master cylinder and brake line and clutch line for manual transaxle. als and check the reservoir for brake fluid while inspecting for possible brake fluid leaks.