OEM Toyota Sienna Brake Master Cylinder Reservoir

Toyota Sienna Brake Master Cylinder Reservoir Parts and Q&A

• Master Cylinder Reservoir
  47220-08030
  Q: How to service and replace the Brake Master Cylinder Reservoir Sub-Assembly on Toyota Sienna?

  A:

  The first step for Brake Master Less Reservoir Tank Cylinder Sub-Assembly service requires draining brake fluid before cleaning painted surfaces with spills. Unplug the battery as a first step before removing the air cleaner assembly with hose and the cowl top panel sub-assembly outer front. Use Special Service Tool: 09023-00101 to disconnect two brake tubes and slide the clip loose from the reservoir hose and remove the two nuts. The procedure for the brake master less reservoir tank cylinder sub-assembly requires placement of the master brake cylinder into a soft-jawed vise using aluminum plates followed by O-ring removal with a screwdriver. Follow the instructions from Special Service Tool: 09023-00101 to remove the brake tube then detach the two nuts and two bolts and sub-assembly before dropping the No.3 piston from the diameter converting unit or No.1 piston from the plunger master cylinder as these parts cannot be reused after dropping. Remove first the two O-rings then utilize a 5 mm pin punch and a hammer to remove the pin afterward under which circumstances remove the Brake Master Cylinder union with two grommets. The installation of new sub-assembly requires first applying grease to two grommets before installation followed by pin union attachment using a pin punch and hammer and subsequent addition of two new O-rings and completion with two nuts and two bolts tightening to 25 Nm (255 kgf-cm, 18 ft. lbs.). It is essential to install the No. 3 piston with no loose space when uniting the diameter converting unit to the master cylinder. Fitting the master cylinder brake tube will take Special Service Tool: 09023-00101 before torqueing it to 15 Nm (155 kgf-cm, 11 ft. lbs.). Install the new O-ring at this time. The procedure includes reattaching the reservoir hose and using Special Service Tool: 09023-00101 to connect the two brake tubes which require 15 Nm (155 kgf-cm, 11 ft. lbs.) torque. Installation includes the air cleaner assembly with hose then filling the reservoir with brake fluid while using Special Service Tool: 09023-00101 to bleed the master cylinder followed by bleeding the brake line before checking the fluid level and inspecting for brake fluid leakage. The cowl top panel sub-assembly outer front should be reinstalled next before inspecting brake pedal height and checking the brake actuator using the Toyota hand-held tester.