Daewoo Nubira. Manual - part 51

HYDRAULIC BRAKES  4A – 11

DAEWOO V–121 BL4

6.  Slowly push and hold the brake pedal one time.

7.  Loosen the front brake line at the master cylinder to

purge air from the cylinder.

8.  Tighten the brake line (as in step 5), and then re-

lease the brake pedal slowly. Wait 15 seconds be-
fore proceeding to the next step.

9.  Repeat the sequence, including the 15–second

wait, until all the air is removed from the master
cylinder bore.

Notice : Care must be taken to prevent brake fluid from
contacting any painted surface to prevent damage to the
paint finish.

10.  After all the air has been removed at the forward

connection(s), bleed the master cylinder at the rear
(cowl) connection(s) in the same manner as with
the front connections.

4A – 12

I

HYDRAULIC BRAKES

DAEWOO V–121 BL4

Important : For vehicles equipped with a non–antilock
braking system, the bleeding sequence is as follows: right
rear, left rear, left front and right front. For ABS vehicles,
refer toSection 4F, Antilock Brake System for the correct
sequence and bleeding procedure.

11.  Attach a transparent tube over the valve. Allow the

tube to hang submerged in brake fluid in a transpar-
ent container.

12.  Slowly push and hold the brake pedal one time.
13.  Remove the bleeder valve dust cover and loosen

the bleeder screw to purge the air from the cylinder.

14.  Slowly release the brake pedal. Wait 15 seconds

before proceeding with the next step.

Important : Rapid pumping of the brake pedal pushes the
master cylinder secondary piston down the bore in a man-
ner that makes it difficult to bleed the system.

15.  Repeat the sequence, including the 15–second

wait, until all the air is removed. It may be neces-
sary to repeat the sequence 10 or more times to
remove all the air.

16.  Tighten the bleeder screw.

Tighten

Tighten the bleeder screw to 8 N

S

m (71 lb–in).

17.  Proceed to bleed the front brakes following the ap-

propriate sequence, beginning with step 12.

18.  Check the brake pedal for sponginess. Repeat the

entire bleeding procedure to correct this condition.

HYDRAULIC BRAKES  4A – 13

DAEWOO V–121 BL4

PRESSURE BLEEDING THE BRAKES

Notice : Pressure bleeding equipment must be of the
diaphragmtype. It must have a rubber diaphragm between
the air supply and the brake fluid to preventir, moisture, oil,
and other contaminants from entering the hydraulic sys-
tem. Contamination could lead to deterioration of the rak-
ing components and loss of braking action.

1.  Disconnect the master cylinder electrical connector.
2.  Remove the master cylinder reservoir cap.

3.  Connect the bleeder with the adapter to the master

cylinder reservoir.

4.  For vehicles with the antilock braking system

(ABS), locate and remove the hydraulic modulator
bleeder valves. Refer toSection 4F, Antilock Brake
System

5.  Charge the bleeder ball to 140 to 172 kPa (20 to 25

psi).

6.  Connect the line to the adapter. Open the line

valve.

7.  Raise and suitably support the vehicle.

Important : The bleeding sequence is as follows: right
rear, left front, left rear and right front.

8.  Attach the bleeder hose to the bleeder valve. Sub-

merge the opposite end of the hose in a clean con-
tainer partially filled with brake fluid.

9.  A107A006 Open the bleeder valve one–half to

three–fourths turn and allow the fluid to flow until no
air is seen in the fluid.

Notice : After the bleeding operation, the brake reservoir
may be pressurized. While disconnecting the bleeder
hose or the unthreaded adapter cap, cover the cap and the
connection with a shop towel to protect painted surfaces
from contact with the brake fluid.

10.  Inspect the brake pedal for sponginess. Repeat the

entire bleeding procedure to correct this condition.

11.  Tighten the bleeder valve and replace the dust cov-

ers.

Tighten

Tighten the bleeder valve to 8 N

S

m (71 lb–in).

4A – 14

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HYDRAULIC BRAKES

DAEWOO V–121 BL4

BRAKE HOSE REAR

Removal Procedure

1.  Raise and suitably support the vehicle.
2.  Disconnect the brake line from the disc brake hose

at the wheel housing bracket on each side of the
vehicle.

3.  Remove the brake hose retainer.

4.  Remove the rear disc brake hose retainer and the

brake hose from the bracket on the steering
knuckle shaft.

5.  Remove the rear disc brake hose from the caliper.

Installation Procedure

1.  Install the rear disc brake hose to the caliper.

Tighten

Tighten the rear disc brake hose–to–caliper bolt to 32
N

S

m (24 lb–ft).

2.  Install the rear disc brake hose and retainer on the

bracket on the steering knuckle shaft

3.  Install the rear disc brake line to the brake hose on

the wheel housing bracket.

Tighten

Tighten the brake line to 16 N

S

m (12 lb–ft).

4.  Lower the vehicle.
5.  Bleed the brake system. Refer to”Manual Bleeding

the Brakes”in this section, or Section 4F, Antilock
Brakes, if applicable.

6.  Check the brake system for leaks.