Daewoo Nubira. Manual - part 225

SECTION : 6B

POWER STEERING PUMP

TABLE OF CONTENTS

SPECIFICATIONS

6B–1

. . . . . . . . . . . . . . . . . . . . . . . . . . 

GENERAL SPECIFICATIONS

6B–1

. . . . . . . . . . . . . . . 

FASTENER TIGHTENING 

SPECIFICATIONS

6B–1

. . . . . . . . . . . . . . . . . . . . . . . 

SPECIAL TOOLS

6B–2

. . . . . . . . . . . . . . . . . . . . . . . . . . . 

SPECIAL TOOLS TABLE

6B–2

. . . . . . . . . . . . . . . . . . . 

DIAGNOSIS

6B–2

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 

POWER STEERING PUMP DIAGNOSIS

6B–2

. . . . . 

MAINTENANCE AND REPAIR

6B–3

. . . . . . . . . . . . . . . 

ON–VEHICLE SERVICE

6B–3

. . . . . . . . . . . . . . . . . . . . . 

SERPENTINE ACCESSORY DRIVEBELT

6B–3

. . . . 

PUMP ASSEMBLY

6B–4

. . . . . . . . . . . . . . . . . . . . . . . . 

UNIT REPAIR

6B–10

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 

PUMP

6B–10

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 

GENERAL DESCRIPTION AND SYSTEM

OPERATION

6B–11

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 

POWER STEERING PUMP

6B–11

. . . . . . . . . . . . . . . . 

SPECIFICATIONS

GENERAL SPECIFICATIONS

Application

Description

Lubricant

Power Steering Fluid DEXRON

±

–III

Pressure

7 500 kPa (1088 psi)

FASTENER TIGHTENING SPECIFICATIONS

Application

N

S

m

Lb–Ft

Lb–In

Accessory Mounting Bracket Bolt 35 26

–

Air Conditioning Compressor Bolts 35

26

–

Air Conditioning Compressor Rear Bracket Bolts

20

15

–

Air Conditioning Refrigerant Line Clamp Bolts

4

–

35

Air Filter Enclosure Bolts

4

–

35

High–Pressure Hose Fitting

28

21

–

Power Steering Pump Nuts

20

15

–

Power Steering Pump Bolts (Upper and Lower) 20

15

–

Power Steering Upper Bracket Link Bolts (Front and Rear)

25

18

–

Serpentine Accessory Drive Belt Tensioner Pulley Bolt

20

15

–

6B – 2

I

POWER STEERING PUMP

DAEWOO V–121 BL4

SPECIAL TOOLS

SPECIAL TOOLS TABLE

J–25034–B

Power Steering Pump

Pulley Remover

DIAGNOSIS

POWER STEERING PUMP DIAGNOSIS

Foaming or Milky Power Steering Fluid (Air in Fluid)

Checks

Action

Check for internal leakage in the power steering
pump,causing an overflow.

Repair the internal pump leakage.
Bleed the system.

Check for a low fluid level.

Repair the internal pump leakage.
Bleed the system.
Cold temperatures will cause the air bubbles in the system
if the fluid level is low.

Low Pressure Due to Power Steering Pump

Checks

Action

Check for an external leakage of the power steering pump
at the seals.

Replace the seals.
Repair the leak.
Bleed the system.

Check for a worn serpentine accessory drive belt.

Replace the serpentine accessory drive belt.

Low Pressure Due to Power Steering Gear

Checks

Action

Check for a scored housing bore.

Replace the housing bore.

Check for leakage at the valve rings or the seals.

Repair the leak.
Bleed the system.

Groaning Noise in the Power Steering Pump

Checks

Action

Check for air in the power steering fluid.

Perform the checks listed in ”Foaming or Milky Power
Steering Fluid (Air in Fluid)” above.

Check for a low level of power steering fluid.

Repair any internal or external leaks.
Bleed the system.

Check for a loose mounting of the power steering pump.

Tighten the pump mounting to specifications.

POWER STEERING PUMP  6B – 3

DAEWOO V–121 BL4

MAINTENANCE AND REPAIR

ON–VEHICLE SERVICE

SERPENTINE ACCESSORY
DRIVEBELT

Removal Procedure

1.  Remove the splash shield from the right front wheel

well to gain access to the tensioner.

2.  Use a wrench to turn the tensioner bolt clockwise,

compressing the tensioner, and releasing the ten-
sion on the serpentine accessory drive belt.

3.  Remove the serpentine accessory drive belt.

Installation Procedure

1.  Use a wrench to turn the tensioner bolt clockwise,

compressing the tensioner, and releasing the ten-
sion on the serpentine accessory drive belt.

2.  With the wrench in place on the tensioner bolt,

have an assistant loop the serpentine accessory
drive belt loosely over the pulleys.

3.  Slip the serpentine accessory drive belt over the

tensioner.

4.  Remove the wrench from the tensioner bolt and the

belt will tighten itself.

6B – 4

I

POWER STEERING PUMP

DAEWOO V–121 BL4

PUMP ASSEMBLY

Removal Procedure

1.  Remove the air filter enclosure.

2.  Remove the bolt from the A/C refrigerant line

clamp.

3.  Position a drain pan to catch coolant that will drain

from the radiator drain cock.

4.  partially open the coolant reservoir cap to vent the

system. Open the radiator drain cock and drain the
coolant until it is below the level of the thermostat
opening. Refer toSection 1D, Engine Cooling.

5.  Place shop rags in position to absorb spills from the

coolant hose and the thermostat housing.

6.  Remove the coolant hose from the thermostat

housing.