Proper steering is the foundation of the safety of any vehicle, whether it is a passenger sedan or a heavy SUV. The slightest defect in this system can turn a trip into a deadly adventure, where the driver loses control of the trajectory of movement. Statistics of road accidents are inexorable: a significant part of accidents occurs precisely because of sudden failure of the steering mechanism or loss of controllability.
A driver who feels extraneous sounds, beating in the steering wheel or uncharacteristic force when turning, must immediately conduct a diagnosis. Ignoring primary symptoms, such as a barely noticeable knock or a slight leakage of fluid, inevitably leads to a complete failure of the node. In this article, we will discuss in detail the main types of breakdowns, methods for their detection and ways to restore the system’s performance.
Modern cars are equipped with complex hydraulic or electric amplifiers that require a qualified approach to maintenance. However, the basic principles of mechanics remain unchanged: where there is friction, there is wear, and where there is pressure, leaks are possible. Understanding these processes will allow you to spot the problem in time and avoid costly repairs or, worse, an accident.
Main signs of failure of the steering system
The first bells about steering problems are often left unaddressed until the situation becomes critical. Free steering, or luft, is one of the most common symptoms. In good condition, the steering wheel should be instantly transmitted to the wheels; if you turn the steering wheel 10-15 degrees, and the car continues to go straight, this is a signal of serious wear of thrusts or tips.
Another sign is the appearance of extraneous sounds. Knocking, creaking or humping when turning the wheels in place or in motion indicates the destruction of bearings, lack of lubrication or damage to the anthers. Especially dangerous. thumping, transmitted to the steering wheel when passing irregularities, as it indicates broken hinges that can jam at any time.
In cars with power booster (GUR) alarming signal is the change in color and smell of working fluid, as well as the appearance of foam in the tank. If the steering wheel began to spin harder at low engine speeds, but becomes easier with their increase, most likely, the problem lies in the pump GUR or tension of the drive belt. Electrical amplifiers (ERMs) often report a fault by ignition of the control lamp on the dashboard.
- 🚗 The appearance of a tangible beating of the steering wheel at certain speeds.
- 🚗 Uneven wear of the tire tread, especially the interior of the front wheels.
- 🚗 Unintentional withdrawal of the car to the side when driving on a straight road.
- 🚗 The appearance of oily spots under the front of the car after parking.
⚠️ Warning: If you feel a sharp increase in steering effort or a complete failure to control, immediately turn on the alarm, smoothly reduce speed and occupy the side of the road. Continuing with defective steering is strictly prohibited!
Diagnosis of mechanical elements: traction and tips
The mechanical part of the steering is experiencing tremendous loads, especially on our roads. The main elements subject to wear are steering-rod And their tips. They provide a rigid connection between the steering rack and the rotary fists of the wheels. Over time, a gap is produced in the hinge joints, which leads to the appearance of backlashes.
For diagnosis, it is necessary to raise the front of the car on the jack or drive it onto the lift. Weaving the wheels with your hands in the horizontal plane (in the positions "3 hours" and "9 hours"), you can feel the presence of free running. If a sharp jerk of the wheel is heard knocking, and the hand lying on the steering traction feels the impact, then the hinge requires replacement. It is important to check not only the external tips, but also the internal thrusts, which are often hidden under the anthers.
Particular attention should be paid to the condition of protective rubber covers - duster. Even a microscopic crack allows dust and moisture to penetrate the mechanism, washing out the lubricant and causing corrosion. A destroyed anther is almost guaranteed the imminent death of an expensive knot. Many drivers change only the worn-out part, forgetting that the resource of the traction-tips pair is often the same.
☑️ Suspension diagnostics
Replacement of tips is a procedure that requires subsequent adjustment of the wheel descent-fall angles. If you ignore this stage, the car will “eat” rubber in a matter of weeks, and the exchange rate stability will remain unsatisfactory. Modern materials allow hinges to walk up to 100 thousand kilometers, but aggressive driving reduces this period by many times.
Problems of steering rack: knocks and leaks
The steering rack is a central node that converts the rotation of the steering wheel into the forward movement of the wheels. In modern cars, it is often combined with a hydraulic or electric amplifier. The most common problem of the mechanical part of the rail is wear and tear. serrated And the guide bushings. This manifests itself in the form of a characteristic knocking when passing pits or "bull cops".
The leak of gums is the second most popular malfunction. Hydraulic liquid under high pressure begins to ooze through the seals, the level in the tank drops, and the pump begins to work "dry", which leads to its rapid failure. You can determine the flow by the characteristic oil spots on the asphalt or a visual inspection of corrugated reiki. If the corrugated oil is removed and the oil inside is repaired, it is inevitable.
Some masters offer a tuning screw of the reiki to eliminate knocking. This measure is temporary and often leads to a biting mechanism.Since with a worn-out serrated pair, the simple convergence of parts does not restore the geometry of the contact. In the long run, this can lead to a wedge of steering wheels on the move, which is deadly.
| Symptoms. | Probable cause | Elimination method |
|---|---|---|
| Knocking on rough driving | Wearing of rack or tip sleeves | Replacement of bushings, traction or tips |
| Fluid leaking under the car | Destruction of Reiki's galls | Replacement of a remake or rake in the assembly |
| Snacking the steering wheel | Shaft corrosion or tooth wear | Repair or replacement of the unit |
| Turning hum | Stifling the system or pump | System pumping, pump replacement |
Recovery of the rack is possible by installing the remplekt, but the quality of spare parts is often inferior to the original. In modern service, it is often recommended to replace the node with a restored or new one, which guarantees predictable resource and security.
Failures of power steering (GUR)
The hydraulic amplifier makes driving the car much easier, but adds complexity to the system. The heart of the system is GOOR pumpThis creates the necessary pressure. When the plates of the rotor or pump body wear, the pressure drops, and the steering wheel becomes "heavy", especially at idle turns. A characteristic feature of a dying pump is howling sound when turning the steering wheel into extreme positions.
It is critical to monitor the quality and level of working fluid. Old oil loses its properties, darkens and may contain wear products that act as an abrasive, killing the exact friction pairs inside the pump and reiki. The fluid replacement should be done according to the regulations, and ideally with a complete washing of the system, although in practice it is often limited to partial replacement.
One of the insidious problems is the smothering of the system. Air bubbles in the hydraulic fluid make the steering wheel "cotton" and uneven in operation. To eliminate it is necessary to check the tightness of the suction line and properly pump the system, rotating the steering wheel from stop to stop with the engine running.
How to check the pressure in the GUR system?
For accurate diagnosis, a manometer is used, connected to the break of the highway. The normal pressure in the system is usually 65-100 bar. If the pressure is below normal with a silenced bypass valve, the pump is defective. If the pressure drops when turning the steering wheel to the extreme position (the valve is open), the problem may be in the rail itself.
Do not forget that long-term retention of the steering wheel in the extreme position (stress) leads to a sharp jump in pressure and overheating of the liquid. This can cause the squeezing of the glands or even rupture of the hoses. The habit of polishing wheels on site also kills the pump and tires.
Failures in the electric power steering (ERM)
The power steering, installed on the shaft of the steering column or directly on the rack, is devoid of hydraulics, but has its vulnerabilities. The main element here is electric motor and the control unit. A frequent problem is the failure of the torque sensor (TORQUE sensor), which reads the driver's efforts. If it fails, the system may work incorrectly or shut down completely.
Overheating of the electric motor is another common disease, especially when actively working with the steering wheel at low speed (parking). The control unit can go into emergency mode, turning off the amplifier until cooling. The driver feels a sharp weighting of the steering wheel. In some models, for example, Toyota or VolkswagenThis is a well-known design feature that requires flashing or replacing the node.
Problems with the electrical part are often accompanied by a lamp failure on the instrument panel. Computer diagnostics in this case is mandatory, since it allows you to read the error codes and understand whether the problem lies in the mechanism, wiring or software. Oxidation of the contacts in the connectors under the hood can also cause periodic system failures.
- 🔌 Break or short circuit in the power supply chain of the electric motor.
- 🔌 Failure of the electric motor itself (wear of brushes, collector).
- 🔌 The software failure of the EUR control unit.
- 🔌 Mechanical damage to the gears of the amplifier gearbox.
When replacing the battery on cars with EUR, it is sometimes necessary to calibrate the steering wheel angle sensor through a diagnostic scanner, otherwise the system may not work properly.
The effect of suspension and tires on handling
Often drivers sin on steering when the problem lies in adjacent systems. Status. running-piece It directly affects the behavior of the car. Worn-out lever salent blocks, broken ball supports or faulty shock absorbers can create the illusion of a steering rack malfunction, generating knocks and vibrations.
The wheels and tires are the only point of contact with the road. Uneven tire pressure, hernias, disc deformation or banal imbalance cause steering beating, which is mistaken for backlash in mechanisms. This is especially noticeable at high speeds. Cheap rubber with soft sidewall can also create a sense of "stickness" and belated reactions to steering commands.
The geometry of the suspension, or the angles of the wheels (fall-down), should be in strict accordance with the factory parameters. Violation of these angles leads not only to the car to the side, but also to increased effort when the steering wheel returns to zero position after turning. Regular monitoring of the suspension condition helps to exclude false diagnoses of the steering system.
⚠️ Warning: Never ignore the vibration of the steering wheel. In addition to discomfort, it indicates a violation of balancing or deformation of elements, which accelerates wear of the bearings of the hubs and steering parts.
A comprehensive approach to diagnosis saves time and money. Before you buy a new rail, make sure the problem is not the tips, tires or breakup. A professional inspection on a descent-break stand often reveals hidden defects that are invisible during visual inspection.
Repair or Replacement: Which to Choose?
When a fault is detected, the owner faces the question: repair or change? In the case of tips and thrusts, the answer is unequivocal - only replacement, since these elements are not repairable. With the steering slats, the situation is more complicated. Restoration of the old reiki with replacement of glands and bushes is cheaper, but requires the search for a quality remake and a qualified master.
Replacing the new original node is the most expensive, but reliable option. However, there are many analogues on the market, the quality of which varies. There is an option to install refurbished rails (exchange), when you hand over your old and get refurbished at the factory. This is often the best balance between price and quality, as the recovery is done with special equipment.
For electric amplifiers, repairs are often limited to replacing a specific sensor or motor if they are removable. If the control unit is burned or the engine itself is built into the non-shattered body, you have to change the assembly. The cost of such work is high, so prevention and careful operation become economically justified.
Remember that after any interventions in the steering or suspension, adjustment of the angles of the wheel installation is required. Neglecting this stage will negate all repair efforts and may lead to new handling issues.
Timely replacement of anthers and liquids in the GUR prolongs the life of the steering rack 2-3 times and costs ten times cheaper than replacing the assembly.
Frequently Asked Questions (FAQ)
Why does the steering wheel buzz when turning only on the cold?
Hum on the cold most often indicates thickening of the liquid GUR or incipient wear of the pump. At low temperatures, the viscosity of the liquid increases, and the pump is more difficult to pump it. If only the first minutes are buzzing, it may be worth replacing the liquid with a less viscous one or checking the tension of the pump drive belt.
Can I drive if the anther of the steering rack is torn?
You can drive, but not for long and very carefully. Without an anther, an abrasive (sand, dirt) will quickly get inside the mechanism, which will destroy the shaft mirror and cuffs. This will cause knocks and leaks. Replace the anther as soon as possible, this is an inexpensive procedure that will save the expensive rack.
How often should I change the fluid in the hydraulic booster?
Manufacturers often write that the liquid is poured for the entire life, but the realities of operation dictate their rules. It is recommended to change the liquid GUR every 60-80 thousand kilometers or once every 3-4 years. Darkening of the oil and the appearance of the smell of burning are signals for immediate replacement.
Why does the steering wheel go back to zero with a delay?
Difficulty returning the steering wheel to a neutral position can be caused by several reasons: an incorrect castor angle (longitudinal inclination of the rack), a pulled steering rack, low tire pressure or a malfunction of the upper bearing of the shock absorber rack. A comprehensive diagnostic of the suspension is required.