Daewoo Nubira. Manual - part 217

6C – 4

I

POWER STEERING GEAR

DAEWOO V–121 BL4

Steering Surges or Jerks When Turning with Engine Running

Checks

Action

Check the power steering pump for insufficient pressure.

Replace the power steering pump.

Check the power steering pump flow control valve for
sticking and improper operation.

Replace the power steering pump.

Check the power steering pump serpentine belt for slip-
page.

Tighten the power steering serpentine belt.

Check for air contamination in the power steering system.

Bleed the power steering system.

Steering Vibrates During Low Speed or Static Steering

Checks

Action

Check for air contamination in the power steering system.

Bleed the power steering system.

Check the power steering pump serpentine belt for loose-
ness.

Tighten the power steering serpentine belt.

Excessive Wheel Kickback or Loose Steering

Checks

Action

Check for air contamination in the power steering system.

Bleed the power steering system.

Check the wheel bearings for wear or damage.

Replace the wheel bearings.

Check the steering gear mounting for improper installa-
tion.

Tighten the steering gear mounting bracket nuts.

Check the intermediate shaft joints for improper installa-
tion.

Adjust the intermediate shaft between the steering gear
and the steering column. Replace the intermediate shaft.

Check the outer tie rods and the ball joints for looseness.

Tighten the tie rods and the ball joints. Replace the tie rods
and the ball joints.

Hard Steering or Lack of Assist (Especially During Parking)

Checks

Action

Check the intermediate shaft joints for improper installa-
tion.

Adjust the intermediate shaft between the steering gear
and the steering column. Replace the coupling flange.

Check the power steering pump flow control valve for
sticking and improper installation.

Replace the power steering pump.

Check the power steering pump for insufficient pressure.

Replace the power steering pump.

Check the power steering pump for internal leaks.

Replace the power steering pump.

Check for a loose or a worn intermediate shaft.

Tighten the intermediate shaft. Replace the intermediate
shaft, as needed.

Check the power steering pump serpentine belt tension.

Tighten the power steering serpentine belt.

POWER STEERING GEAR  6C – 5

DAEWOO V–121 BL4

POWER RACK AND PINION
STEERING GEAR BENCH TESTING

Removal, Setup and Testing Procedure

Important : Pressure checks or pressure and flow checks
may also be conducted using this setup.

1.  Disconnect and remove the power steering gear.

Refer to”Rack and Pinion Assembly” in this section.

2.  Place the power steering gear on a bench next to

the vehicle.

3.  Disconnect the pressure line at the point where the

hose connects to the pipe. Extend this line to reach
the power steering gear on the bench.

4.  Disconnect the return line from the the power steer-

ing fluid reservoir. Extend this line to reach the pow-
er steering gear on the bench.

5.  Connect the power steering pipes to the power

steering gear.

6.  Start the engine and allow it to idle for 10 seconds.
7.  Check the power steering fluid level. Refer toSec-

tion 6A, Power Steering System.

8.  Start the engine and turn the rack and pinion stub

shaft a full turn in each direction. Hold the shaft
against each stop for 5 seconds.

9.  Inspect for possible leak points. Refer toSection 6A,

Power Steering System.

Installation Procedure

1.  Stop the engine.
2.  Disconnect the power steering pipes from the pow-

er steering gear.

3.  Remove the extensions and reconnect the pressure

and return lines.

4.  Install and connect the power steering gear. Refer

to”Rack and Pinion Assembly” in this section.

5.  Start the engine and allow it to idle for 10 seconds.
6.  Check the power steering fluid level. Refer toSec-

tion 6A, Power Steering System.

6C – 6

I

POWER STEERING GEAR

DAEWOO V–121 BL4

MAINTENANCE AND REPAIR

ON–VEHICLE SERVICE

RACK AND PINION ASSEMBLY

Tools Required

KM–507–B Ball Joint Remover

Removal Procedure

1.  Disconnect the negative battery cable.
2.  Raise and suitably support the vehicle.
3.  Remove the wheels. Refer toSection 2E, Tires and

Wheels.

4.  Disconnect the power steering gear fluid outlet

pipe. Place a drain pan under the steering gear to
catch the power steering fluid.

5.  Disconnect the power steering gear fluid inlet pipe.

6.  Position the steering gear straight ahead by turning

the steering wheel until the steering wheel spokes
are vertical and pointed to the left.

7.  Scribe amark on the stub shaft housing that lines

up with a mark on the intermediate shaft lower cou-
pling.

POWER STEERING GEAR  6C – 7

DAEWOO V–121 BL4

8.  Loosen the intermediate shaft pinch bolt.

9.  Remove the crossmember assembly. Refer toSec-

tion 2C, Front Suspension.

10.  Remove the bolt from the lower steering gear

mounting bracket and the bolt (right side) and the
nut (left side) from the upper steering gear mount-
ing brackets.

11.  Remove the rack and pinion assembly from below.

Installation Procedure

1.  Install the rack and pinion assembly from below.

The steering gear must be in a straight–ahead posi-
tion, and the steering wheel spokes must be verti-
cal and pointing to the left. Align the marks on the
shafts to ensure proper positioning.