In everyday life, steering wheel of our car is most frequently used part. After a long period of use, we found that steering wheel is getting heavier and heavier, at this time we need to find out reason.
The reason power steering is heavy
The hydraulic steering system is mainly composed of booster pump, belt, booster fluid storage tank, oil pipeline and other components. The booster pump is connected to engine via a belt so that engine drives booster pump which drives steering. power. Therefore, when a car has a heavy power steering, it is mainly caused by following reasons:
1. No booster oil.
Lack of booster oil will directly result in heavy steering as booster pump needs enough oil to push piston and provide power. Therefore, when there is a lack of booster oil in car, it is necessary to check whether there is oil leakage in pipeline, if there is no oil leakage, it is necessary to check whether oil is dirty, whether pipeline is clogged, etc., and then repair it according to specific problem. .
2. The lift pump belt slips or breaks.
The booster pump needs a belt to transmit engine power. If belt slips, it will cause booster pump to not reach operating speed standard, making booster heavy; if belt breaks, booster pump will directly lose its working power source. Sometimes a car breaks down without help of power at all. Therefore, if above situation occurs, only booster pump belt needs to be replaced.
The reason why electronic power steering is heavy
The electronic power steering system replaces booster pump, oil booster, oil pipe, belt and other components of traditional power steering system, and uses engine to enhance steering force, mainly composed of sensors, control units and other components. . Therefore, when vehicle turns hard, it is mainly caused by following reasons:
The motor is damaged.
The motor is last link providing power steering and also most important link. Damage to it will increase weight of car or directly disable amplifier. During maintenance, check not only health of circuit, but also health of sensor, control unit, fuse, relay and other components. After eliminating above interference, just replace booster motor directly.
Low pressure in front tires.
Reduced tire pressure increases contact area between tire and ground, which also means more frictional resistance while driving or turning. Therefore, when dealing with it, first check to see if tire is leaking, and replenish air pressure if there is no leak.
In general, there are four main causes of insufficient steering power, namely lack of power steering oil, a slipped or broken charge pump belt, engine damage, and low front tire pressure. Of course, above four reasons are not cause of heavy steering. Problems such as damage to booster pump, damage to steering gear, and incorrect four-wheel alignment data can also cause power to become heavy.