Check and adjust the braking system. Hyundai Getz (2002 release)

Adjusting the height of the brake pedal on the floor

Measuring the height of a pedal on the floor

Fig. 6.1. Measuring the height of the pedals from the floor: 1 - the switch of a signal of braking; 2 - the nut brake switch; 3 - the height of the brake pedal; 4 - lock nut pusher of the brake pedal; 5 - the brake pedal pusher

Remove the floor mat and measure the pedal height above the floor (Fig. 6.1). If the pedal height is incorrect, adjust as described below.

Disconnect the connector switch brake, loosen the lock nut brake switch and tighten it so that it does not touch the brake pedal arm.

Fig. 6.2. Adjusting the length of the pusher

Loosen the lock nut and adjust the height of the pusher of the brake pedal on the floor within the specified limits, which increase or decrease the length of the pusher, rotating it with pliers (Fig. 6.2).

Turn the switch brake set the gap between it and the stop pedal pusher within 0.5-1.0 mm. Tighten the lock nut torque switch 8-10 Nm.

NOTE

Stroke of the brake pedal should be at least 130 mm.

If you deviate from the normal course of a pedal height adjustment pedal again and the gap between the switch and the brake pedal stop.

Make sure that when you release the brake pedal brake light goes out.

With the engine off, reset the vacuum in the vacuum amplifier, two or three times by pressing the brake pedal and pushing the hand check the free running of the brake pedal.

If the free travel is less than the lower limit, make the appropriate regulations, the gap between the switch plunger brake and brake pedal stop.

If the free travel more than the specified upper limit, it means that too large a gap between the axle and the brake pedal lever. Check the technical condition of the parts and replace them if necessary.

Checking the technical condition and performance of the braking system

With the engine running, press on the brake pedal with a force of about 120 kg. Check for leaks in the brake master cylinder, hydraulic brakes and each connection.

Check the operation of the brake servo without the use of instruments

For a simple test the vacuum amplifier proceed as follows.

Start up the engine, let it run for 1-2 minutes and then stop. Repeatedly press the brake pedal with normal force. If the pedal goes down in the first

pressing, but gradually rises during the second or third time you press, the brake booster is OK. If the pedal height does not change, the amplifier is faulty.

With the engine off, repeatedly press the brake pedal and check the pedal height variation. Then press the pedal and let the engine. If the pedal goes down a little, power is OK. If the pedal height remains unchanged, the amplifier is faulty.

With the engine running, press on the brake pedal and stop the engine. Hold the brake pedal for 30 seconds. If during this time the pedal height does not change, power is OK. If the pedal rises, the booster is defective.

If one of the ways to check the fault has been identified, check the vacuum hose and the amplifier, eliminate the fault. If the results of all tests are positive, the amplifier is undamaged.

Check the operation of the check valve of the vacuum brake booster

Verification is done on the check valve installed in the vacuum hose.

Fig. 6.3. Brake servo: 1 - the vacuum brake booster; 2 - pressure regulator (vehicles without ABS); 3 - the brake pipes; 4 - a vacuum hose

NOTE

The check valve is installed with an interference fit in the vacuum hose by adjusting labels.

Check the operation of the check valve by using a vacuum pump.

A WARNING

In case of failure of the check valve assembly, replace it with the vacuum hose.

Remove the brake fluid reservoir cap and add brake fluid (Fig. 6.4).

A WARNING

If you get brake fluid in the body paintwork wash it off immediately.

NOTE

When you remove the air from the hydraulic circuit under pressure, do not press the brake pedal.

Fig. 6.5. Bleeding the hydraulic brakes

Attach a vinyl hose to the bleed screw on the wheel cylinder, lower the other end of the hose into a container with brake fluid (Fig. 6.5).

While pressing the pedal to failure loosen bleed screw up until through the hose begins to leak brake fluid, then tighten the union.

Repeat the above steps as long as the flowing fluid from the brake cylinder is not air bubbles.

Perform the operation in the other wheel cylinders in the following order: the rear right wheel (the direction of the vehicle), the front left wheel, the rear left wheel, the front right wheel.

After pumping hydraulic brakes 20 times Depress the brake pedal with a force of more than 10 kgs.

More than three times to failure tighten the parking brake lever.

Fig. 6.6. Parking brake lever 1 - the parking brake lever; 2 - an adjusting nut; 3 - the parking brake cable; 4 - leveler; 5 - a casing

When lifting the lever must move to 6-8 teeth sector (point of application of force shall be located at a distance of 25 mm from the end of the lever). When moving to a greater or lesser number of teeth of the sector adjust the stroke of the lever (Fig. 6.6).

Control lamp of parking brake goes out when the brake is completely switched off and lights up when the lift arm by one tooth sector. If the switch does not operate as specified, replace it.

After adjustment make sure that no braking on the rear wheels when fully lowered the parking brake lever.