OEM 2009 Scion xB Brake Master Cylinder

2009 Scion xB Parts Questions & Experts Answers

• Q: How to remove and replace the brake master cylinder on 2009 Scion xB?

  A: Drain the braking fluid first as you start to change the brake master cylinder while washing off all fluid touching painted surfaces. Begin by taking off the windshield wiper arm cover followed by front wiper arm together with blade assemblies from both left and right sides. The next step involves removal of the hood to cowl top seal and both cowl top ventilator louver assemblies and front wiper motor with linked components. The next procedures require both outer cowl top panel and air cleaner assembly detachment. The clutch reservoir tube requires loose of its clip before disconnecting. Begin sub-assembly master cylinder brake tube separation as follows: first disconnect the brake fluid level warning switch connector while removing the wire harness from the master cylinder then detach the harness clamp from its wire harness clamp bracket followed by using a union nut wrench to split the two brake tubes from the sub-assembly. The brake master cylinder sub-assembly removal begins by removing two nuts and the wire harness clamp bracket before the sub-assembly and its O-ring can be taken out. The master cylinder must be handled gently to protect it from impact and never use a dropped master cylinder again and make sure no pressure is applied to the piston. Release brake booster vacuum before removing the master cylinder and keep it either flat or positioned in a downward direction to maintain the piston. Use a cloth to remove contaminant from the master cylinder piston before applying an even layer of soap-based lithium glycol grease to its sliding part while strictly avoiding alternative fluids and grease materials.