Toyota 4Runner: Removal

Toyota 4Runner Service Manual / Brake / Brake System (other) / Hydraulic Brake Booster / Removal

REMOVAL

CAUTION / NOTICE / HINT

NOTICE:

When installing, coat the parts indicated by arrows with lithium soap base glycol grease (See page ).

As high pressure is applied to the brake actuator tube No. 1, never deform it.
Do not turn the ignition switch ON until the procedures are completed.
Before starting the work, make sure that the ignition switch is off and depress the brake pedal more than 20 times.

HINT:

When pressure in the power supply system is released, the reaction force decreases and the stroke becomes longer.

PROCEDURE

1. DISCONNECT CABLE FROM NEGATIVE BATTERY TERMINAL

CAUTION:

Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to disable the SRS system.

NOTICE:

When disconnecting the cable, some systems need to be initialized after the cable is reconnected (See page ).

2. DRAIN BRAKE FLUID

NOTICE:

Wash off brake fluid immediately if it comes into contact with a painted surface.

3. REMOVE LOWER NO. 1 INSTRUMENT PANEL AIRBAG ASSEMBLY

(a) Remove the lower No. 1 instrument panel airbag assembly (See page ).

4. REMOVE PUSH ROD PIN

(a) Remove the clip and push rod pin from the brake pedal lever.

5. REMOVE HYDRAULIC BRAKE BOOSTER ASSEMBLY

(a) Disconnect the 3 connectors from the hydraulic brake booster assembly.

(b) Use tags or make a memo to identify the place to reconnect.

HINT:

*1: To front wheel cylinder RH
*2: To front wheel cylinder LH
*3: To rear wheel cylinder RH
*4: To rear wheel cylinder LH

(d) Remove the 4 nuts and pull out the hydraulic brake booster assembly.

6. REMOVE BRAKE BOOSTER GASKET

(a) Remove the brake booster gasket from the brake master cylinder.

On-vehicle Inspection

ON-VEHICLE INSPECTION PROCEDURE 1. INSPECT BRAKE MASTER CYLINDER FLUID PRESSURE CHANGE (a) Inspect the battery voltage. Battery voltage: 11 to 14 V ...

Disassembly

DISASSEMBLY PROCEDURE 1. REMOVE NO. 1 BRAKE ACTUATOR BRACKET (a) Using a 5 mm hexagon wrench, remove the bolt and No. 1 brake actuator bracket. ...

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Inspection
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