2004 DAEWOO NUBIRA steering

SECTION : 6B
POWER STEERING PUMP
TABLE OF CONTENTS
SPECIFICATIONS6B–1 . . . . . . . . . . . . . . . . . . . . . . . . . .
General Specifications 6B–1. . . . . . . . . . . . . . . . . . . . .
Fastener Tightening Specifications 6B–1. . . . . . . . . . .
DIAGNOSIS6B–2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Power Steering Pump Diagnosis 6B–2. . . . . . . . . . . . .
MAINTENANCE AND REPAIR6B–3 . . . . . . . . . . . . . . .
ON–VEHICLE SERVICE 6B–3. . . . . . . . . . . . . . . . . . . . . Serpentine Accessory Drive Belt 6B–3. . . . . . . . . . . . .
Pump Assembly 6B–4. . . . . . . . . . . . . . . . . . . . . . . . . . .
UNIT REPAIR 6B–7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Pump 6B–7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
GENERAL DESCRIPTION AND SYSTEM
OPERATION6B–8 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Power Steering Pump 6B–8. . . . . . . . . . . . . . . . . . . . . .
SPECIFICATIONS
GENERAL SPECIFICATIONS
ApplicationDescription
LubricantPower Steering Fluid DEXRON®–II or III
Pressure
– without EVO8330 kPa ~ 8820 kPa (1208 psi ~ 1279 psi)
– with EVO8500 kPa ~ 8960 kPa (1233 psi ~ 1299 psi)
FASTENER TIGHTENING SPECIFICATIONS
ApplicationNSmLb–FtLb–In
Air Filter Housing Assembly Bolts6–53
High–Pressure Hose Fitting2821–
Power Steering Pump Bolts2518–
Right Side Power Steering Pump Bracket Bolts3526–

6B – 2IPOWER STEERING PUMP
DAEWOO V–121 BL4
DIAGNOSIS
POWER STEERING PUMP DIAGNOSIS
Foaming or Milky Power Steering Fluid (Air in Fluid)
ChecksAction
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
ChecksAction
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
ChecksAction
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
ChecksAction
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 DRIVE
BELT
Removal Procedure
1. Remove the air filter housing assembly bolts and
the air intake tube.
2. Remove the air filter housing assembly from the
vehicle.
3. Use a wrench to turn the tensioner bolt clockwise,
compressing the tensioner, and releasing the ten-
sion on the serpentine accessory drive belt.
4. Remove the serpentine accessory drive belt.

6B – 4IPOWER STEERING PUMP
DAEWOO V–121 BL4
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, loop
the serpentine accessory drive belt loosely over the
pulleys.
3. Slip the belt over the tensioner.
4. Remove the wrench from the tensioner bolt and the
belt will tighten itself.
5. Install the air filter housing assembly into the ve-
hicle.
6. Install the air intake tube and the air filter housing
assembly bolts.
Tighten
Tighten the air filter housing assembly bolts to 6 NSm
(53 lb–in).
PUMP ASSEMBLY
Removal Procedure
1. Remove the serpentine accessory drive belt. Refer
to ”Serpentine Accessory Drive Belt” in this sec-
tion.
2. Disconnect the electrical connector at the Electronc
Vaariable Orifice (EVO) solenoid actuator.

POWER STEERING PUMP 6B – 5
DAEWOO V–121 BL4
3. Position a drain pan to catch the power steering
fluid that will drain from the high–pressure hose af-
ter it is disconnected from the power steering
pump.
4. Disconnect the high–pressure hose fitting from the
power steering pump.
5. Position a drain pan to catch the power steering
fluid that will drain from the supply hose after it is
disconnected from the power steering pump.
6. Disconnect the supply hose from the power steer-
ing pump.
7. Remove the bolt from the front right side of the
power steering pump.
8. Remove the two power steering pump bolts and
remove the power steering pump from the vehicle.
Installation Procedure
1. Install the power steering pump into the vehicle and
install the two power steering pump bolts.
Tighten
Tighten the two power steering pump bolts to 25 NSm
(18 lb–ft).
2. Swing the power steering pump bracket down and
install the front right side bolt.
Tighten
Tighten the both of the right side power steering pump
bracket bolts to 35 NSm (26 lb–ft).

6B – 6IPOWER STEERING PUMP
DAEWOO V–121 BL4
3. Connect the supply hose to the power steering
pump.
4. Connect the high–pressure hose fitting to the power
steering pump.
Tighten
Tighten the high–pressure hose fitting to 28 NSm (21
lb–ft).
5. Connect the electrical connector at the Electronic
Variable Orifice (EVO) solenoid actuator.
6. Install the serpentine accessory drive belt. Refer to
”Serpentine Accessory Drive Belt” in this section.
7. Refill the power steering fluid. Refer to Section 6A,
Power Steering System.
8. Bleed the power steering system. Refer to Section
6A, Power Steering System.

POWER STEERING PUMP 6B – 7
DAEWOO V–121 BL4
UNIT REPAIR
PUMP
The unit repair of the power steering pump in this vehicle
is not serviceable.
A faulty pump must be replaced with a new one.

6B – 8IPOWER STEERING PUMP
DAEWOO V–121 BL4
GENERAL DESCRIPTION
AND SYSTEM OPERATION
POWER STEERING PUMP
The power steering pump is a multivaned hydraulic pump.
The serpentine accessory drive belt on the engine drives
the power steering pump.The power steering pump provides the hydraulic pressure
to the power steering gear.
The power steering gear uses the hydraulic pressure to
assist in steering the vehicle.
The power steering system uses a remote reservoir in or-
der to make available more space in the engine compart-
ment.