Daewoo MATIZ - Page 697

POWER STEERING PUMP 6B–3
DAEWOO M-150 BL2
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.