en_4j2_6b.pdf part of Daewoo Nubira/Lacetti Service Manual - Daewoo Lacetti.part01.rar, Also known as: Chevrolet Nubira / Lacetti, Chevrolet Optra Optra5, Suzuki Forenza Reno Covers the 1.4L, 1.6L and 1.8L engine. Year 2004 text manual preview

Text preview for : en_4j2_6b.pdf part of Daewoo Nubira/Lacetti Also known as: Chevrolet Nubira / Lacetti, Chevrolet Optra Optra5, Suzuki Forenza Reno Covers the 1.4L, 1.6L and 1.8L engine. Year 2004

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SECTION : 6B

POWER STEERING PUMP
TABLE OF CONTENTS
SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . 6B1 General Specifications . . . . . . . . . . . . . . . . . . . . . 6B1 Fastener Tightening Specifications . . . . . . . . . . . 6B1 DIAGNOSIS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6B2 Power Steering Pump Diagnosis . . . . . . . . . . . . . 6B2 MAINTENANCE AND REPAIR . . . . . . . . . . . . . . . 6B3 ONVEHICLE SERVICE . . . . . . . . . . . . . . . . . . . . . 6B3 Serpentine Accessory Drive Belt . . . . . . . . . . . . . 6B3 Pump Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . 6B4 UNIT REPAIR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6B7 Pump . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6B7 GENERAL DESCRIPTION AND SYSTEM OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6B8 Power Steering Pump . . . . . . . . . . . . . . . . . . . . . . 6B8

SPECIFICATIONS
GENERAL SPECIFICATIONS
Application Lubricant Pressure without EVO with EVO 8330 kPa ~ 8820 kPa (1208 psi ~ 1279 psi) 8500 kPa ~ 8960 kPa (1233 psi ~ 1299 psi) Description Power Steering Fluid DEXRONŽII or III

FASTENER TIGHTENING SPECIFICATIONS
Application Air Filter Housing Assembly Bolts HighPressure Hose Fitting Power Steering Pump Bolts Right Side Power Steering Pump Bracket Bolts NSm 6 28 25 35 LbFt 21 18 26 LbIn 53

6B 2IPOWER STEERING PUMP

DIAGNOSIS
POWER STEERING PUMP DIAGNOSIS
Foaming or Milky Power Steering Fluid (Air in Fluid)
Checks Check for internal leakage in the power steering pump, causing an overflow. Check for a low fluid level. Action Repair the internal pump leakage. Bleed the system. 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 Check for an external leakage of the power steering pump at the seals. Check for a worn serpentine accessory drive belt. Replace the seals. Repair the leak. Bleed the system. Replace the serpentine accessory drive belt. Action

Low Pressure Due to Power Steering Gear
Checks Check for a scored housing bore. Check for leakage at the valve rings or the seals. Repair the leak. Bleed the system. Action Replace the housing bore.

Groaning Noise in the Power Steering Pump
Checks Check for air in the power steering fluid. Check for a low level of power steering fluid. Check for a loose mounting of the power steering pump. Action Perform the checks listed in "Foaming or Milky Power Steering Fluid (Air in Fluid)" above. Repair any internal or external leaks. Bleed the system. Tighten the pump mounting to specifications.

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POWER STEERING PUMP 6B 3

MAINTENANCE AND REPAIR
ONVEHICLE SERVICE SERPENTINE ACCESSORY DRIVE BELT
Removal Procedure
1. 2. Remove the air filter housing assembly bolts and the air intake tube. 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 tension on the serpentine accessory drive belt.

4.

Remove the serpentine accessory drive belt.

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6B 4IPOWER STEERING PUMP Installation Procedure
1. Use a wrench to turn the tensioner bolt clockwise, compressing the tensioner, and releasing the tension on the serpentine accessory drive belt. With the wrench in place on the tensioner bolt, loop the serpentine accessory drive belt loosely over the pulleys.

2.

3. 4.

Slip the belt over the tensioner. Remove the wrench from the tensioner bolt and the belt will tighten itself.

5. 6.

Install the air filter housing assembly into the vehicle. Install the air intake tube and the air filter housing assembly bolts.

Tighten
Tighten the air filter housing assembly bolts to 6 NSm (53 lbin).

PUMP ASSEMBLY
Removal Procedure
1. Remove the serpentine accessory drive belt. Refer to "Serpentine Accessory Drive Belt" in this section. Disconnect the electrical connector at the Electronc Vaariable Orifice (EVO) solenoid actuator.

2.

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POWER STEERING PUMP 6B 5
3. Position a drain pan to catch the power steering fluid that will drain from the highpressure hose after it is disconnected from the power steering pump. Disconnect the highpressure hose fitting from the power steering pump. 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. Disconnect the supply hose from the power steering pump.

4. 5.

6.

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 lbft). 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 lbft).

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6B 6IPOWER STEERING PUMP
3. Connect the supply hose to the power steering pump.

4.

Connect the highpressure hose fitting to the power steering pump.

Tighten
Tighten the highpressure hose fitting to 28 NSm (21 lbft).

5.

Connect the electrical connector at the Electronic Variable Orifice (EVO) solenoid actuator.

6. 7. 8.

Install the serpentine accessory drive belt. Refer to "Serpentine Accessory Drive Belt" in this section. Refill the power steering fluid. Refer to Section 6A, Power Steering System. Bleed the power steering system. Refer to Section 6A, Power Steering System.

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POWER STEERING PUMP 6B 7

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.

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6B 8IPOWER STEERING PUMP

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 order to make available more space in the engine compartment.

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