Although the steering wheel is used to control the steering, but the different power system is still different, so it is best to first familiar with the power of their own car characteristics, and then to fault analysis. In general, there are three forms of help system on the market today.
First, the mechanical hydraulic power system
Engine belt drive, hydraulic power, this form of help will give a clear sense of road feedback, there is a strong positive moment, low-speed direction to play, high-speed direction is very stable. Hydraulic power has long been already appeared, and now the technology has been very mature.
If the direction of the obvious emphasis on the reasons for the failure of some:
1, turn to help the oil too dirty. Help oil is the force medium, if the oil is dirty, it will cause poor circulation, the general direction of hard work. More serious steering pump will "buzz" sound.
2, lack of oil or oil spill. Help the oil did not, it is equivalent to no help, check the relevant system there is no traces of oil spills. Focus on inspection to help the oil pot, help the tubing, the direction of the machine.
3, the engine power belt too loose or too tight, or belt aging, tightness can be adjusted, the belt can only be replaced aging.
4, turn to the system with too tight or poor bearing lubrication; steering tie rod ball too tight or lack of oil; steering shaft and casing bending caused by stuck, etc., which is the steering system mechanical failure. Some cars can be adjusted with the gap, but most of the adjustment can not; steering rods are generally recommended to replace the ball; steering shaft and casing bending, unless there is a big accident or man-made, do not recognize very little damage.
5, the front axle or frame bending deformation, and some through the sheet metal can be adjusted over most of the time or suggested replacement.
6, front wheel front beam too tight, need to do four wheel positioning.
7, tire pressure is insufficient, in fact, this should be the primary inspection, but also the most easy to judge, but need to use the barometer, this change is not very obvious with the naked eye is not observed.
Second, the electronic hydraulic power system
Electronic hydraulics do not use belt drive, but specifically have an electric booster pump. This setting will not have a clear sense of feedback, bumpy road does not affect the driving experience, and the steering wheel will rise with the speed becomes very heavy, but also to improve high-speed stability.
Electronic hydraulic power steering wheel is too heavy, in addition to reference to the above 7 points, but also pay attention to electric pump without fault.
Third, the electronic power system
In recent years, the emerging power system, eliminating the need for hydraulic systems, direct motor drive, traffic interference almost no, and in the low speed when the operation is very light, high-speed direction becomes heavy, theoretically in the three power systems are the most light The operation is also the most sensitive, but sometimes because of the adjustment of the manufacturers are different.
The failure of the electronic power system may refer to the above 4,5,6,7, note that the motor is also a factor to consider.