Daewoo Matiz (2003 year). Service manual - part 172

6B – 2  POWER STEERING PUMP

DESCRIPTION AND OPERATION

POWER STEERING PUMP

The pump has a remote fluid reservoir. A pressure-relief
valve inside the flow control valve limits pump pressure.

POWER STEERING PUMP  6B – 3

DIAGNOSTIC INFORMATION AND PROCEDURES

POWER STEERING PUMP

Condition

Probable Cause

Correction

Foaming, Milky
Power Steering Fluid,

D

Insufficient power steering fluid level.

D

Fill the power steering fluid
reservoir.

Low Fluid Level, and
Possible Low

D

Contaminated air in the power steering
fluid.

D

Bleed the power steering system.

Pressure

D

Internal leaks and overflow of the power
steering pump.

D

Replace the power steering pump.

D

Leaks of the power steering pump housing
and the soft plug.

D

Replace the power steering pump.

Low Pressure Due to
Steering Pump

D

Stuck and improperly operated power
steering pump flow control valve.

D

Replace the power steering pump.

D

Worn power steering pump seats.

D

Replace the power steering pump.

D

Scores, cracks, or breaks of the pressure
plate, the pump ring, the thrust plate, and
the rotor.

D

Replace the power steering pump.

D

Sticking of the vanes in the rotor slots.

D

Replace the power steering pump.

D

Internal leaks and overflow of the power
steering pump.

D

Replace the power steering pump.

Growling Noise in
Steering Pump

D

Restricted flow of the pump hoses and the
steering gear pipes.

D

Clean out the pipes and the hoses.

D

Replace the pipes and the hoses as
needed.

D

Scores, cracks, or breaks of the pressure
plate, the pump ring, the thrust plate, and
the rotor.

D

Replace the power steering pump.

D

Improperly contacted power steering hose
with the body.

D

Secure the pump hose in a clamp
away from the body.

D

Insufficient power steering fluid level.

D

Fill the power steering pump
reservoir.

Ratting Noise in the
Steering Pump

D

Contaminated air in the power steering
fluid.

D

Bleed the power steering system.

D

Improperly contacted power steering hose
with the body.

D

Secure the pump hose in a clamp
away from the body.

D

Insufficient power steering fluid level.

D

Fill the power steering pump
reservoir.

D

Improperly installed pump mounting.

D

Tighten the power steering pump
attachment bolts.

Swishing Noise in the
Steering Pump

D

Damaged power steering pump flow control
valve.

D

Replace the power steering pump.

Whining Noise in the

D

Scores of the pressure plate and the vanes.

D

Replace the power steering pump.

Steering Pump

D

Scores of the pump shaft bearing

D

Replace the power steering pump.

6B – 4  POWER STEERING PUMP

REPAIR INSTRUCTIONS

ON–VEHICLE SERVICE

D105C524

PUMP DRIVE BELT

Removal Procedure

1. Remove the front passenger side headlamp. Refer to

Section 9B, Lighting Systems.

2. Remove the pump drive belt.

D

Loosen the rear bracket adjusting bolt (1).

D

Loosen the bolt (2).

D105C525

D

Loosen the front bracket adjusting bolts (3).

D

Push the pump forward (4).

18–22 N

S

m

20–24 N

S

m

20–24 N

S

m

D15C526A

Installation Procedure

1. Install the pump drive belt with the bolts.

Tighten

D

Tighten the front bracket adjusting bolt to 18–22
N

S

m (13–16 lb-ft) (1).

D

Tighten the rear bracket adjusting bolt to 20–24
N

S

m (15–18 lb-ft) (2).

D

Tighten the power steering pump bolt to 20–24
N

S

m (15–18 lb-ft) (3).

2. Install the front passenger side headlamp. Refer to

Section 9B, Lighting Systems.

POWER STEERING PUMP  6B – 5

D105C527

PUMP DRIVE PULLEY

Tools Required

DW310–020 Power Steering Pulley Remove Holder

Removal Procedure

1. Remove the front passenger side headlamp.

Refer to Section 9B, Lighting Systems.

2. Remove the steering pump pulley.

D

Remove the pump drive belt. Refer to “Pump Drive
Belt” in this section.

D

Fix the pulley using the power steering pulley re-
move holder DW310–020 (1).

D

Remove the pump drive pulley nut (2).

55–69 N

S

m

D15C528A

Installation Procedure

1. Install the pump drive pulley. Install the steering pump

pulley nut.

2. Install the pump drive belt.

3. Tighten the steering pump pulley nut using the power

steering pulley remove holder DW310–020.

Tighten

Tighten the steering pump pulley nuts to 55–69 N

S

m

(41–51 lb-ft).

4. Install the front passenger side headlamp.

Refer to Section 9B, Lighting Systems.

D105C529

PUMP ASSEMBLY

Removal Procedure

1.Remove the front passenger side headlamp.

Refer to Section 9B, Lighting Systems.

2. Disconnect the pipe line from the pump.

D

Disconnect the supply line pipe hose (1).

D

Disconnect the pressure line pipe fitting (2).

D105C530

3. Remove the power steering pump.

D

Remove the pump drive belt. Refer to “Pump Drive
Belt” in this section.

D

Disconnect the power steering pressure switch
connector (1). Refer to Section 6A, Power Steering
Systems.

D

Remove the bolts (2).