The main reasons for heavy steering of Audi car are as follows:
1. The movement clearance of steering system components is too small, the components are deformed, lack of lubrication, and the moving components are damaged and stuck;
2. Power steering system failure. Judge before repairing
3. Power steering system failure.
During maintenance, it is necessary to determine the general scope of the fault before further maintenance and troubleshooting. First, lift the vehicle with a lift to make the four wheels of the vehicle turn the steering wheel off the ground. If the steering is flexible and light, it means that the fault lies in the driving system. Check whether the tire pressure is too low, whether the four-wheel alignment value is inaccurate, and whether the steering bearing is too tight.
If you still feel heavy, you can disconnect the connection between the steering gear and the suspension, and then turn the steering wheel. If the steering is flexible, it means that the fault lies in the steering transmission mechanism. Check whether the tie rod, steering arm or shock absorber are bent or deformed. If the steering is still heavy, it means that the fault lies in the power steering system. Check whether the oil level of the steering hydraulic oil is too low and whether the oil quality is deteriorated. If the oil level is too low, first check whether there is any leakage, and then add the hydraulic oil to the standard height.
If the oil quality deteriorates, it must be replaced. When replacing, pay attention to exhaust the air in the power steering system, otherwise the effect of power assistance will be seriously affected. The power steering system oil pressure gauge can be used to measure the system oil pressure to judge the quality of the steering pump. If the steering gear is still heavy, the steering gear needs to be disassembled and checked to see if there is a lack of lubricating oil, corrosion, rack bending and other conditions. If there is any of the above phenomena, it is necessary to carry out necessary maintenance or replace parts to eliminate the fault.