Daewoo MATIZ Service Manual page 697

DIAGNOSTIC INFORMATION AND PROCEDURES
Condition
Foaming, Milky
Power Steering Fluid,
Low Fluid Level, and
Possible Low
Pressure
Low Pressure Due to
Steering Pump
Growling Noise in
Steering Pump
Ratting Noise in the
Steering Pump
Swishing Noise in the
Steering Pump
Whining Noise in the
Steering Pump
DAEWOO M-150 BL2
POWER STEERING PUMP
Probable Cause
D Insufficient power steering fluid level.
D Contaminated air in the power steering
fluid.
D Internal leaks and overflow of the power
steering pump.
D Leaks of the power steering pump housing
and the soft plug.
D Stuck and improperly operated power
steering pump flow control valve.
D Worn power steering pump seats.
D Scores, cracks, or breaks of the pressure
plate, the pump ring, the thrust plate, and
the rotor.
D Sticking of the vanes in the rotor slots.
D Internal leaks and overflow of the power
steering pump.
D Restricted flow of the pump hoses and the
steering gear pipes.
D Scores, cracks, or breaks of the pressure
plate, the pump ring, the thrust plate, and
the rotor.
D Improperly contacted power steering hose
with the body.
D Insufficient power steering fluid level.
D Contaminated air in the power steering
fluid.
D Improperly contacted power steering hose
with the body.
D Insufficient power steering fluid level.
D Improperly installed pump mounting.
D Damaged power steering pump flow control
valve.
D Scores of the pressure plate and the vanes.
D Scores of the pump shaft bearing
POWER STEERING PUMP 6B – 3
Correction
D Fill the power steering fluid
reservoir.
D Bleed the power steering system.
D Replace the power steering pump.
D Replace the power steering pump.
D Replace the power steering pump.
D Replace the power steering pump.
D Replace the power steering pump.
D Replace the power steering pump.
D Replace the power steering pump.
D Clean out the pipes and the hoses.
D Replace the pipes and the hoses as
needed.
D Replace the power steering pump.
D Secure the pump hose in a clamp
away from the body.
D Fill the power steering pump
reservoir.
D Bleed the power steering system.
D Secure the pump hose in a clamp
away from the body.
D Fill the power steering pump
reservoir.
D Tighten the power steering pump
attachment bolts.
D Replace the power steering pump.
D Replace the power steering pump.
D Replace the power steering pump.