Abnormal sound of steering pump is one of the common problems of a vehicle. It may affect driving experience, vehicle maneuverability, and safety. The following are possible causes and symptoms of abnormal sound of steering pump and corresponding solutions:

Causes of abnormal sound of a steering pump:

1. Insufficient or deteriorated hydraulic oil: Insufficient hydraulic oil may result in inadequate lubrication in the pump, and consequently increase friction and noise. The oil may also deteriorate due to high temperature or prolonged use.

2. Air ingress into the system: If air enters the system, bubbles may appear, causing pump to fail and producing abnormal sound.

3. Pump wear or failure: After prolonged use, internal components of the steering pump (such as impeller and seal) will wear, which can lead to oil leakage or unsmooth operation.

4. Steering gear failure: If there is a failure in the steering gear, connecting rod, or other components connected to the steering pump, noise may also be transmitted along the failed parts.

5. Improper installation: If the pump is installed improperly or if the fixing bolts are loose, vibration may occur and consequently cause noise.

6. Dirty hydraulic oil or presence of impurities: Impurities in the oil can interfere with normal operation of the pump and lead to abnormal sound.

Symptoms of abnormal sound of a steering pump:

1. High-pitched sound: The sound may be caused by internal wear of the pump or bubbles. 

2. Low-pitched growling sound: it is typically caused by hydraulic oil shortage or pump failure.

3. Intermittent whistling sound: This occurs when the steering wheel is turned, and may be related to air ingress.

Solutions to abnormal sound of a steering pump:

1. Check hydraulic oil: Check the oil level and color of the hydraulic oil regularly to ensure that it is sufficient and has not deteriorated. If dirty hydraulic oil is discovered, the oil and the filter element should be replaced.

2. Discharge the air: If air has entered the system, it can be discharged via an exhaust valve. Please refer to the corresponding vehicle maintenance manual for specific steps.

3. Check the pump and the steering gear: Check the connecting components between the steering pump and the steering gear to ensure that no wear or oil leakage has occurred.

4. Perform professional inspection: If there is constant sharp noise, it is advisable to consult a professional technician for timely inspection and repair to prevent occurrence of more serious malfunctions.

Advantages of vika steering pump:

1. Pump body: The body of vika steel pump is die cast with smooth and flat surface.

2. Pump cover: The bolt installation holes for the pump cover are well machined (milled). The hexagonal flange bolts are easier to be installed flat and less likely to get loose after installation.

3. Oil distributor: The oil distributor for vika steel pump is based on a secondary steam treatment process, which results in high wear resistance and clean appearance.

4. Sealing ring: The O-ring is made of fluororubber, which leads to high tensile strength, excellent temperature resistance, high hardness, and a long service life.

5. Bearing: The roller bearing for vika steel pump is of NSK brand. Produced at a high cost, it features low noise and a long service life.

6. Oil inlet connector: The oil inlet connector features good surface roughness, smooth oil feeding, and stable pressure.