1998 — 2003 of release

Repair and operation of the car

Lexus RX 300
+ Lexus RX-300 cars
+ Governing bodies and methods of operation
+ Settings and routine maintenance of the car
+ Engine
+ Cooling systems of the engine, heating, ventilation and air conditioning
+ A power supply system and production of the fulfilled gases
+ Systems of electric equipment of the engine
+ Automatic transmission and interaxal differential
+ Transmission line
- Brake system
   General information and security measures
   Removal, installation and check of pedals of the brake system
   Check of the brake system via the socket of the module of management
   Removal and installation of the tank and main brake cylinder (MBC)
   Removal, check and installation of the amplifier of brakes
   Replacement of brake shoes
   Removal, dismantling, check, assembly and installation of supports of brake mechanisms
   Dismantling, check and assembly of the parking brake
   Valve check of distribution of brake effort
   Removal and installation of the activator of brakes
   Removal and installation of wheel sensors
+ Suspension bracket and steering
+ Body
+ Onboard electric equipment
+ Schematic diagrams of electric connections


General information and security measures

General information

Forward and back wheels of all cars considered in the present manual are equipped with disk brake mechanisms.

The brake system consists of the main brake cylinder, the vacuum amplifier and disk brake mechanisms of forward and back wheels and is divided according to the diagonal scheme into two independent hydraulic contours. At refusal of any of contours (for example, as a result of sealing violation) the second continues to function in the normal mode, providing adequate braking of the vehicle. In addition pressure valve regulator providing dynamic correction of effort of braking of back wheels according to change of load of a back axis of the car is built in contours of both back brake mechanisms. Liquid pressure in both contours is created by the main brake cylinder (MBC) having a tandem design. Activation of GTTs happens when squeezing a pedal of a working brake.

The short description of the principles of functioning of system of anti-blocking of brakes (ABS) is provided in the Part Methods of operation and auxiliary systems.

The tank with brake fluid is fixed on the main brake cylinder (MBC). The amplifier of brakes accumulates a part of the vacuum created in the inlet pipeline of the engine.

The parking brake with manual (on the European models) or foot (on the American models) the drive influences through cables the special shoe assemblies which are a part of disk brake mechanisms of back wheels.

Security measures

Brake fluid is among highly toxic and chemically aggressive connections and at contact with body panels destroys a paint and varnish covering!

The brake dust produced in the course of wear of brake shoes may contain unhealthy asbestos of the person, - at all do not inhale it when cleaning brake mechanisms!

Work with the brake system demands special purity and exact observance of instructions. In the absence of necessary experience it is expedient to address on HUNDRED.

At movement along wet roads it is necessary to press periodically a brake pedal for removal of moisture from brake disks; In the course of rotation of a wheel moisture under the influence of centrifugal force is dumped from brake disks, but there is a silicone film, rubber attrition products, lubricant and other pollution reducing efficiency of braking!

The disk brake mechanisms damaged by corrosion when braking create the effect of jolting which is not disappearing over time. In that case it is necessary to replace disks.

Burning of dirt to a surface of brake shoes is led to formation of furrows on a surface of brake disks that leads to decrease in efficiency of braking.

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