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11.5. Check of serviceability of functioning / tightness, removal and installation of the vacuum amplifier of brakes

Details of installation of assembly of the vacuum amplifier of brakes

1 — the Assembly block of the relay of the air conditioning system
2 — the Electromagnetic valve
3 — the Contact socket of an electrical wiring of the sensor of level of brake fluid
4 — the Brake tube
5 — Assembly of GTTs with the tank
6 — the Vacuum hose with the built-in control valve
7 — the Union
8 — the Forelock

9 — the Washer
10 — the Pin
11 — the Bolt of a basic arm of a returnable hydraulic tube
12 — the Bolt of a basic arm of a hydraulic tube
13 — Assembly of the vacuum amplifier
14 — Sealing laying
— Replace N


The servo-driver of vacuum strengthening of brakes does not need regular service, except for periodic checks of a condition of a vacuum hose.


Check of serviceability of functioning

 PERFORMANCE ORDER

Holding a pedal of a foot brake of squeezed out, start the engine. If right after start the pedal slightly "fails", therefore, the vacuum amplifier of brakes works regularly.


Tightness check

 PERFORMANCE ORDER

1. Start the engine for a couple of minutes, then muffle. Several times slowly squeeze out a pedal of a foot brake. If the pedal course with each squeezing is gradually reduced, being stabilized on the third or fourth muscleman, so tightness of assembly of the vacuum amplifier is not broken.
2. Squeeze out a pedal of a foot brake at the working engine. Holding a pedal of squeezed out, kill the engine. If 30 seconds of keeping of the pedal pressed its reserve course later does not change, therefore, tightness of assembly of the vacuum amplifier is not broken.


Removal

 PERFORMANCE ORDER

1. The block of the vacuum amplifier of brakes is not subject to recovery repair and in case of refusal has to be replaced assembled. Details of installation of assembly are presented on an illustration.
2. Disconnect the vacuum hose brought to the amplifier from the inlet pipeline of the engine. Try not to damage a hose, removing it from the union on assembly of the amplifier.
3. Give fixing nuts and carefully remove from assembly of the vacuum amplifier the main brake cylinder (see the Section Removal and the GTTs installation), - try not to allow bending and twisting of hydraulic lines.
4. In interior of the car find knot of connection of a rod of a pusher of the vacuum amplifier to a pedal of a foot brake, - (in case of need use a pocket small lamp). Take the forelock, release a cylindrical pin and disconnect a cutting finger of a pusher from the pedal lever.
5. From salon at the left under the dashboard give four nuts of fastening of assembly of the vacuum amplifier to a partition of a motive compartment, - in case of need use a pocket small lamp.
6. Pass into a motive compartment and remove assembly of the vacuum amplifier from a back partition. Pull assembly strictly on an axis of its installation before full release of a rod of a pusher. Take assembly from a motive compartment.


Installation and adjustment

 PERFORMANCE ORDER

1. Installation is made upside-down. Tighten all fixture with the required effort. Do not forget to replace the forelock of a pin of fastening of a rod of a pusher to a pedal. Track reliability of fixing of a returnable spring.

2. When replacing the vacuum amplifier make check/adjustment of the adjusting sizes:

a) Measure pusher vystupaniye size over the surface of assembly of the vacuum amplifier interfaced to GTTs. Write down result of measurement, having designated it as the size "A";
b) Measure distance from the interfaced surface of a landing flange to GTTs end face. Write down result of measurement, having designated it as the size "B";
c) Measure distance from GTTs end face to the bottom of a pocket in the piston under landing of a rod of a pusher. Write down result of measurement, having designated it as the size "C";
d) For receiving a landing gap of a rod of a pusher subtract the size B from the size C, then subtract from the received result the size A;
e) Compare result of calculation to requirements of Specifications, in case of need make the corresponding adjustment of length of a pusher (see further). If the size A appears less than depth of a pocket in the GTTs piston (With - In), the rod needs to be truncated, otherwise - to extend.

3. If the size of a landing gap exceeds the limit of admissible range, weaken the gear nozzle equipped with a notch on the end of a rod and rotation of an adjusting core achieve the required result. Having finished adjustment, strongly tighten a lock-nut and repeat check.

4. Establish into place in GTTs and connect a vacuum hose to assembly of the vacuum amplifier. Track reliability of tightening of a collar of fastening of a hose on the reception union.
5. Adjust the adjusting height and size of a free wheeling of a pedal of a foot brake (see the Section Adjustment of a Pedal of a Foot Brake).
6. Before starting operation of the car make sure of serviceability of functioning of the brake system.