Toyota Land Cruiser 100 / Amazon, Lexus LX 470

Since 1997 of release

Repair and car operation

Check of brake system

Remember that developed at functioning of brake mechanisms the dust can contain extremely unhealthy the person asbestos. At all do not blow off a dust the compressed air and do not inhale it, at service of mechanisms put on a protective mask or a respirator. At all do not use for rubbing of components of brake system gasoline or solvents on an oil basis apply only firm cleaners or methyl spirit! Try колодок to use at replacement only components not containing asbestos.

More detailed illustrative material in the Head Brake system.

PERFORMANCE ORDER

1. The condition of components of brake system, besides regular, stipulated by the schedule of routine maintenance, checks, should be estimated each time at removal of wheels or at occurrence of signs of infringement of functioning of system. Колодки disk brake mechanisms are usually equipped by the special indicators notifying on excessive deterioration of frictional overlays by characteristic squeal at braking. The symptoms listed more low can be a sign of malfunction of components of brake mechanisms:

At braking the car loses course stability (there is a withdrawal in one of the parties);
During braking brake mechanisms publish squeal or a scratch;
Excessively the course of a pedal of a brake increases;
At squeezing of a brake pedal pulsations are felt;
Traces of leak of a brake liquid (usually on an internal surface of disks of wheels and tyres) take place.

2. Ослабьте nuts of fastening of wheels.
3. Поддомкратьте the car also establish it on props.
4. Remove wheels.

Disk brake mechanisms of forward and back wheels

PERFORMANCE ORDER

1. The support of each of brake mechanisms is equipped by two колодками, internal and external. End faces колодок are well looked through through a special observation port in the support case (address to accompanying illustrations) after wheel removal.

2. The estimation of a residual thickness of a frictional overlay internal колодки is made visually through the observation port mentioned above. If overlays are worn out over an admissible limit (Specifications see), it is necessary to make complex replacement brake колодок.

Remember that frictional overlays приклепаны or are pasted to the metal substrate which thickness should not be considered at measurement.

3. If visually to estimate a residual thickness of overlays it appears inconveniently, or there is a necessity for more detailed survey колодок, remove a support () and take колодки for more detailed studying (the Brake system see the Head).
4. After колодки will be taken from a support, clear them by means of special means and measure a residual thickness of overlays by means of a ruler or a calliper with нониусной a scale.
5. By a micrometer measure a thickness of brake disks. Compare results of measurements to standard requirements (Specifications see). If the thickness any leaves disks abroad an admissible range, replace it (the Brake system see the Head). If a thickness of a disk in norm, check up its general condition. Pay attention to such defects as deep scratches, furrows, teases, overheat traces, etc., in case of need remove a disk and give it in проточку (the Brake system see the Head).

6. Before establishing to the place of a wheel, examine all brake lines on presence of signs of damages, deterioration, destruction as a result of ageing of a material, traces of leaks, bends, twisting and other deformations (in particular near to points of connection of flexible brake hoses to supports of brake mechanisms) (address to an accompanying illustration). Check up reliability of fastening of hoses collars. Make sure that any of brake hoses systems of release of the fulfilled gases or a suspension bracket (do not adjoin to acute angles of the components of a body located in the neighbourhood, at any positions of a steering wheel). In case of need make corresponding repair or correct a route of a lining of lines. Defective components replace (the Brake system) see the Head.

The vacuum amplifier

PERFORMANCE ORDER

1. Check of serviceability of functioning of the vacuum amplifier of brakes is made from a driver's place.
2. At completely squeezed out pedal of a foot brake start the engine, the pedal should fail a little more.
3. At the working engine some times squeeze out a pedal of a foot brake. The size of a course of a pedal should remain a constant.
4. Squeeze out a pedal, muffle the engine and continue to keep a pedal pressed during about 30 seconds during which it should not neither fail more low, nor rise.
5. Again start the engine, allow to it to work for about a minute, then again muffle. Again some times firmly squeeze out a pedal, – the course size should be reduced with everyone качком.
6. In case of negative result of the described check the servo-driver of the vacuum amplifier of brakes is subject to regenerative repair or replacement (the Brake system see the Head).

Lay brake

PERFORMANCE ORDER

1. Slowly pull a control lever of a lay brake upwards till the end of its course and count quantity of clicks of a ratchet. Compare result of calculation to requirements of Specifications. In case of need make corresponding adjustment (the Brake system see the Head).
2. Alternatively estimation of serviceability of functioning of a lay brake can be made by a car parking on a site of road going under a bias and fixing by its motionlessly lay brake at neutral position of a transmission. If the brake does not keep the car at raising of its lever on demanded quantity of clicks, it is necessary to make adjustment.