OEM Scion xA Clutch Master Cylinder

Scion xA Clutch Master Cylinder Parts and Q&A

• Master Cylinder
  31420-52030
  Q: How to service and repair the clutch master cylinder on Scion xA?

  A:

  The procedure for fixing the clutch master cylinder begins by removing the Brake Master Cylinder along with the brake actuator assembly and Brake Booster assembly. The first step is to remove the clutch pedal spring then detach the clutch master cylinder push rod clevis through clip and pin removal. Remove first all brake fluid before disconnecting the clutch reservoir tube by unscrewing its retaining clip. Use Special Service Tool: 09023-00101 to disconnect the flexible hose tube by catching the fluid in a container and afterward remove the clutch master cylinder assembly by removing its two nuts. Unscrew the clutch master cylinder assembly by first tapping out its slotted spring pin with a pin punch and hammer before removing the inlet union and grommet then freeing the lock nut and push rod clevis and lock nut. Push the push rod to release the boot covering the cylinder body and carefully use snap ring pliers to remove the snap ring and then proceed with removing the push rod with care for the piston potential release. Pull out the piston with spring and stop plate from the cylinder body being cautious to safeguard the inner surface. The assembly requires coating the components with lithium soap base glycol grease while you put the piston with spring into the cylinder body followed by installation of the stop plate and push rod before securing the snap ring and boot. Secure the lock nut on the push rod followed by attaching the push rod clevis temporarily and putting the inlet union with new grommet into place before tapping in the slotted spring pin. Installation of the clutch master cylinder requires torquing two nuts to 9.0 Nm (80 kgf-cm, 81 inch lbs.) before connecting the flexible hose tube using Special Service Tool: 09023-00101 to a torque of 15 Nm (155 kgf-cm, 11 ft. lbs.). Connect the clutch reservoir tube while checking that it is not twisted with the white mark facing upward. After applying MP grease to the pin, connect the clevis to the clutch pedal with the pin and clip by installing the pin from the left side of the vehicle. After assembling the brake components install the clutch pedal spring followed by the brake booster assembly and the brake actuator assembly and brake master cylinder. You should complete the brake reservoir with brake fluid before bleeding the clutch system and verifying the fluid level and checking both systems for leaks while also inspecting and adjusting the clutch pedal subassembly.
• Cylinder Kit, Clutch Master
  04311-12110
  Q: How to overhaul the Clutch Master Cylinder Assembly (MTM) on Scion xA?

  A:

  The replacement procedure for Clutch Master Cylinder Assy (MTM) begins with unattaching the Brake Master Cylinder sub-assy followed by the brake actuator assy and Brake Booster assy and then clutch pedal spring and clutch master cylinder push rod clevis with hole pin while removing clip and hole pin. Cylinder fluid drainage must be followed by unclipping the clutch reservoir tube. Use Special Service Tool: 09023-00100 to disconnect the clutch master cylinder from its flexible hose tube while collecting fluid in a container. Clear the master cylinder clutch assembly through a procedure of removing the two retaining nuts. To replace the clutch master cylinder kit users must remove the slotted spring pin with a pin punch and hammer before taking off the inlet union and grommet while loosening the lock nut and removing the push rod clevis and lock nut. Push the push rod until the snap ring releases and then use snap ring pliers to pull it out from the cylinder body. Afterwards the push rod can be extracted. Handle the piston carefully because it could suddenly emerge out of the cylinder. Pull off both the stop plate and the piston with spring from inside the cylinder without harming its wall. The installation of the clutch master cylinder kit requires applying lithium soap base glycol grease onto parts before installing the piston with spring inside the cylinder while attaching the stop plate to the push rod which leads to attaching the push rod to the cylinder body. The push rod must be pushed forward while the snap ring should go in first then install the boot then fasten the lock nut on the push rod. Install the push rod clevis along with the lock nut prior to putting on the inlet union and new grommet while driving the slotted spring pin. Reinstall both clutch master cylinder nuts to 12 Nm torque before connecting the master cylinder to its flexible hose tube with Special Service Tool: 09023-00100 at 15 Nm torque (120 kgf-cm, 9 ft. lbs.). The clutch reservoir tube needs to be joined to the clutch master cylinder assy through the clip but ensure the assembly remains untwisted with the white mark facing upward. Place MP grease onto the hole pin contact surface and bush contact area before joining the clevis to the clutch pedal assy through the hole pin and then install the clip. The service concludes with installation of the clutch pedal spring followed by the brake booster assy and brake actuator assy and subsequent removal of the brake master cylinder sub-assy. Clutch pipeline bleeding requires filling the brake reservoir tank with clutch fluid at 8.4 Nm (86 kgf-cm, 74 inch lbs.), leakage inspection, reservoir fluid level check and clutch pedal sub-assy examination and adjustment.