Question 1

How to service and repair the Brake Master Cylinder on Toyota 4Runner?

Accepted Answer

Before servicing the Brake Master Cylinder start by disconnecting its level warning switch connector. Apply a syringe to drain fluid but maintain all water lines clear from painted surfaces because the fluid should be instantly cleaned with water. To service and repair the Brake Master Cylinder use Special Service Tool: 09023-00100 to disconnect brake lines for six models without ABS but only two models with ABS deserving a torque of 15 Nm (155 kgf-cm, 11 ft. lbs.). The first step is to remove the master cylinder by disconnecting its 2 nuts and check valve bracket with bracket. Molecular torque should be set at 13 Nm (130 kgf-cm, 9 ft. lbs.). When installing the brake booster push rod follow the removal guide backward while ensuring to adjust its length before assembly. The installation process requires filling the brake reservoir with brake fluid then bleeding the brake system followed by leak and brake pedal checks and adjustments.

Question 2

How to remove the brake master cylinder on Toyota Camry?

Accepted Answer

The first step to remove the brake master cylinder requires shutting off the engine then pressing the brake pedal several times to release vacuum from the brake booster. Inspection of painted surfaces requires an immediate response when brake fluid appears. Drain brake fluid before disassembling the air cleaner cap sub-assembly, air cleaner filter element sub-assembly and the pairs of front wiper arm and blade assemblies (LH and RH). The next step requires removal of the front fender to cowl side seals from both LH and RH positions followed by taking out the cowl top ventilator louver sub-assembly and the windshield wiper motor and link assembly. The procedure requires disassembly of the front cowl top outer panel assembly by disconnecting its clamp followed by removing four nuts and four bolts. The branch tube leading to the clutch reservoir can be detached from the brake master cylinder sub-assembly through removing its clip. The brake master cylinder removal process for TMC-made vehicles begins by using Special Service Tool: 09023-00101 to remove the 6 brake lines and disconnect the connector. The technician then must remove the brake master cylinder to way tube before extracting the front brake tube way and O-ring with its two retaining nuts. Similar methods should be used for disassembly of TMMK made vehicles without VSC using the same steps as TMC made vehicles. The brake master cylinder sub-assembly removal process begins by using Special Service Tools 09023-38200 and 09023-00101 to disconnect the 6 brake lines followed by removing the brake master cylinder to way tube and then unfastening the 2 nuts, front brake tube way and O-ring of the TMMK-made vehicles with VSC.

Question 3

How to remove and replace the brake master cylinder on Toyota Tacoma?

Accepted Answer

The brake master cylinder replacement starts with pumping the brake pedal multiple times to vent vacuum from the booster before disconnecting the battery's negative cable and draining the fluid. Then immediately cleanse any touched paint with solvent. The clutch reservoir tube needs to be separated from the reservoir system of manual transmission vehicles before any work can proceed. First disconnect the brake fluid level warning switch connector followed by using a union nut wrench to separate the 2 brake lines from the brake master cylinder sub-assembly, remove the 2 nuts, then extract the brake master cylinder sub-assembly from the brake booster with caution to preserve the O-ring. Keep the master cylinder out of harm to protect its usefulness because a dropped master cylinder cannot be put back into use. Keep the pressure off the master cylinder piston while installation and removal of the sub-assembly by minimizing bending and positioning it horizontally or downward. This arrangement prevents piston detachment. Foreign objects should not come into contact with the master cylinder piston and in case of contamination a clean cloth should be used to remove the foreign matter followed by lithium soap-based glycol grease application around the circumference of the piston pnictle. Different types of grease or fluid must not be used during this process.

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