Hello -
According to the diagrams you have a couple of belts but one is just for the power steering. . ..correct?
It sounds to me like your power steering belt is loose and may be stretched.
I would replace the belt. I have attached the info on belt replacement and the location of the adjustment bolt.
You should barely have  inch of deflection at the center most point of the belt between the two pulleys.
Also was it doing this before and that is why you replaced the pump itself? Please make sure you have plenty of PS fluid also.
CHECKING POWER STEERING BELT TENSION
1. Press the V belt, applying a pressure of 98N (10kg, 22lb) at the specified point and measure the deflection to confirm that it is within the standard value.
Standard value
V belt deflection: 7 10 mm (0.27 0.39 in)
Fig. 7: Checking Power Steering Belt Tension
Courtesy of KIA MOTORS AMERICA, INC.
2. If the belt deflection is beyond the standard value, adjust the belt tension as follows.
1. Loosen the bolt(A) adjusting the power steering V belt tension.
Fig. 8: Identifying Power Steering V Belt Tension Bolt
Courtesy of KIA MOTORS AMERICA, INC.
2. Put a bar or equivalent, between the bracket and the oil pump and adjust the tension so that the belt deflection is within the standard value.
3. Tighten the bolt adjusting the power steering V belt tension.
4. Check the belt deflection and adjust it again if necessary.
CAUTION: After turning the V belt in the normal rotation direction more than once, recheck the belt deflection.
CHECKING POWER STEERING FLUID LEVEL
1. Position the vehicle on a surface level.
2. Start the engine. With the vehicle kept stationary, turn the steering wheel several times continuously to raise the fluid temperature to 50 - 60 °C(122 to 140 °F).
3. With the engine at idle, turn the steering wheel fully clockwise and counterclockwise several times.
4. Make sure there is no foaming or cloudiness in the reservoir fluid.
5. Stop the engine to check for any difference in fluid level between a stationary and a running engine.
Wednesday, February 18th, 2009 AT 3:43 PM