The rumble in the power steering of the car will definitely alert both the novice motorist and the experienced driver. Its cause may be faulty, the condition of the drive belt, oil that needs to be replaced.
Hum and noise in the hydraulic booster can cause
- faulty power steering rack;
- unsatisfactory condition of the oil that needs to be changed;
- problems with the power steering pump;
- critical wear of the drive belt or its weakened state.
Oil, if its condition is not controlled and not changed in time, loses its properties and its use leads to extraneous noise in the hydraulic booster. The oil should be clear, not cloudy, and should not have a burning smell. If such signs are observed, the oil must be changed immediately. At the same time, it must be filled only with a brand that is recommended for cars of a particular type.
The fluid in the hydraulic booster should be replaced once every one and a half years.
A rumble when turning the steering wheel may occur from a faulty power steering rack. The reason for the failure of the steering rack may be the harsh Russian climate. Sharp jumps in temperature and high humidity adversely affect this mechanism. And salt, which is sprinkled on highways in winter, corrodes protective elements - anthers and oil seals. They fail, the hydraulic booster buzzes and leaks.
Novice motorists, having heard such noises coming from the hydraulic booster, are in a hurry to contact a car service. However, you can find out the cause of the hum yourself.
A faulty steering rack can be repaired or replaced. However, there are not many masters who would undertake to repair the steering rack. Most likely, you will have to purchase a new rail.
The power steering belt can also be the cause of the hum. Perhaps it is already worn out enough, or perhaps it just needs to be tightened up.
If the power steering pump is faulty, a hum also appears. Recall that the pump pumps working fluid into the power steering system. And if it is out of order, it is more advisable to replace it with a new one, and not try to repair it.
It is difficult to imagine a modern car without power steering. But some 15-20 years ago, it was commonplace, almost all drivers turned the steering wheel only when the car was moving, since it was much more difficult to do it on the spot.
Today, cars are equipped with various designs of power steering, the main place is divided between a hydraulic booster and an electric one, but it is also not uncommon for a car to be configured with an electro-hydraulic power steering. Given the fact that it is the power steering that is considered the most common and popular, we will analyze in detail the methods and methods for checking the health of the power steering pump.
Basic pump malfunctions
1. Increased play and failure of the bearing of the working shaft.
2. Violation of the integrity of the stuffing box of the working shaft of the pump.
3. Wear and scuffing of the rotor blades.
4. Pressure reducing valve failure.
5. Violation of the tightness of the pump housing.
6. Drive belt slip on pump pulley, loose tension.
What are the signs and symptoms of breakdowns
- Airing of the working line.
This problem is usually due to two faults. One of them is considered to be a violation of the tightness of the power steering pump housing, as well as cracks in pipelines, hoses and connecting elements.
The second failure is air leakage through a faulty shaft bearing and its oil seal, which is the most common problem that occurs much more often than the first. The main sign of airing the oil line is the appearance of bubbles in the reservoir of the amplifier, and foaming and squeezing of liquid from under the reservoir cover is also not a rare case.
- Buzz and noise during operation.
If the power steering pump began to publish noise and loud hum when the engine is running, most likely the reason lies in its inability to create the required pressure. This happens, mainly due to the wear of the rotor blades and their "hanging" in its body. Also, this symptom may be from the distortion of the rotor, as a result of wear and play of the bearing of the power steering pump.
In the winter season, the buzz of the pump when it malfunctions may not be significant until the working fluid warms up, it is also worth noting that the steering wheel “cold” turns much easier than after a couple of minutes of warming up. This defect is often masked by many car dealers by replacing the liquid with a more viscous one. Distinguish such a "masquerade" not every amateur succeeds.
Bearing failed
If the bearing fails, the hum and howl in the pump area will be constant, regardless of the load on the steering gear. It is not difficult to check such a breakdown, it is enough with the engine turned off to shake the pump pulley in a vertical plane. With good bearing backlash should not be. It will not be superfluous to check the bearing with a phonendoscope or a long screwdriver with the engine running, knocks, rattles and loud noise are not acceptable.
- Whistle when turning the wheel
A fairly common malfunction, especially on cars that are monitored extremely carelessly. The essence of the problem lies in the slippage of the belt on the booster pump pulley, this happens at the time of its active operation, that is, when the steering wheel is in a state of motion. The reason most often lies in the stretching of the drive belt or its weak tension.
- The steering wheel becomes very heavy when driving
As a rule, with an increase in engine speed, if the steering wheel becomes significantly heavier, then this indicates a failure of the pressure reducing valve, which maintains the nominal pressure in the entire system. To reliably confirm this version, it will not be superfluous to measure the pressure in the line with a special pressure gauge.
What is the resource and life of the pump.
Several factors influence the longevity and reliability of the power steering pump:
1. Timeliness and quality of oil change, special system fluid.
2. Driving style of the driver. With sharp and frequent re-gassing, the bearing comes out much faster than usual.
3. Drive belt tension. When it is tightened strongly, the bearing will “buzz” very quickly.
4. Holding the steering wheel in the extreme position for more than 3-5 seconds causes an enormous load on the pump rotor. Wear in such operation will be clearly increased.
Despite the above facts, on average, the pumps of the hydraulic power steering system are quite serviceable work for 150-200 thousand kilometers. Breakdowns that happen before this run are often just isolated cases.
Timely change the power steering fluid
Monitor fluid level and check for leaks
Do not turn the steering wheel without warming up the system (3-5 minutes)
Do not use sealants and additives that seal leaks in the system.
In custody.
Repair of the power steering pump requires sufficiently high equipment and compliance with certain technologies. Doing repairs yourself is not always a smart decision, just like buying a contract one. In turn, replacing with a new node will be a much more correct way out.
If the power steering is buzzing when the steering wheel is turned on the spot, then you should understand this issue and eliminate the malfunctions that have arisen. This problem occurs from time to time for many owners of cars that have this device. Consider the causes and possible consequences of such breakdowns, and whether it makes sense to pay attention to such trifles, as many people think.
There are many reasons for the increased hum of the hydraulic power steering. Extraneous noises tell us about the occurrence of a malfunction in the steering. The sooner you can fix this problem, the more money you can save and avoid the risk of an accident on the road with a faulty vehicle control system.
Causes of noise
Unpleasant noise from the hydraulic power steering usually appears in various situations. Consider the simplest reasons why the power steering is buzzing when the steering wheel is turned:
- Insufficient fluid level for system operation. This is checked visually. To do this, check the fluid level. The level must be between the minimum and maximum marks. If there is not enough oil, and the level is below the minimum, then add fluid. But before such a procedure, it is necessary to immediately find the cause of the oil leak. This is especially true if very little time has passed after topping up the oil. Usually, a leak appears at the joints and on the clamps, especially on old hoses.
- The filled fluid does not meet the factory recommended specifications. This usually causes both a hum and more serious breakdowns. In winter, the hydraulic booster may hum due to the fact that the fluid is not designed to operate in special temperature conditions, for example, in severe frosts, even if it meets the recommended parameters.
- Poor quality fluid in the system. When purchasing counterfeit oil, there is a high probability that after a certain time it will not have the necessary properties, and the hydraulic booster will buzz. As usual, along with the rumble, you can find that the steering wheel has become more difficult to turn. In such a situation, it is imperative to check the oil for quality. To do this, you should also check the liquid visually. If the oil is very blackened, or lumps have formed in it, then it is necessary to replace it with a new one. Ideally, the consistency of the oil should not differ much from new oil. You can check the quality of the oil visually. To do this, liquid is drawn into the syringe and dripped onto a sheet of white paper. In this case, it is allowed to use any color of the liquid, depending on the original brand used. The oil should not be too dark in color. You should also check its smell from the tank. The oil should not smell like burnt oil or burnt rubber. The fluid should only be changed in accordance with the vehicle manual. Typically, the replacement frequency is about 100 thousand km, or once every two years. If necessary, you need to change the oil. A list of the best power steering oils can always be found.
- The penetration of air into the system is a dangerous phenomenon that is harmful to the power steering pump. You should check whether there is foam in the expansion tank or not. If there is foam, you need to pump the hydraulic booster, or replace the fluid with another one.
- Steering rack problems. It can be a serious cause of humming. It is better to make a diagnosis and inspection. The main signs of a rail malfunction are a knock in the body, or an extraneous sound from the front wheels. This can happen from damage to gaskets, as well as various anthers, steering rod covers. As a result, the working fluid can leak, dirt, dust can penetrate, and knocking can appear. At the same time, it is necessary to repair and service it with the help of repair kits that are on sale, or go to a service station. You should not drive with a broken steering rack, this usually leads to jamming of the mechanism and, as a result, an accident.
- Loose power steering belt. It is very easy to check this. This process must be carried out when the motor has been running for the specified time (the longer the motor has been running, the easier it is to check). If the belt slides over the pulley, it heats up quickly. This should be verified by touching it with your hand. To tension the power steering belt, you should know the force of normal belt tension. If there is no manual for the car at hand, and you have forgotten the magnitude of the force, then you should go to a car workshop. If the belt is excessively worn, it should be replaced.
- Power steering pump defective. This is the most costly and serious malfunction. Its main feature was the increase in the effort at which the steering wheel is performed. The reasons for this hum of the GURA pump were various faulty parts of the engine - oil seals and bearing assemblies.
Power steering hums when cold
There are many different reasons why an unheated power steering can buzz. The first reason is the suction of air through the low pressure channels. To eliminate air leakage, it is necessary to install two clamps on the line going from the tank to the power steering pump. You should also replace the ring installed on the suction pipe of the pump. After mounting the clamps, it is advisable to use an oil-resistant sealant, which should be lubricated at the joints.
It is also necessary to identify conditionally another reason, the occurrence of which is unlikely. But there are situations when insufficient pumping of the hydraulic booster channels is performed. At the same time, an air area remains at the bottom of the expansion tank, which is removed with a syringe. The presence of this air can create the sound in question.
Elimination techniques can replace the power steering pump, oil hoses, and add extra clamps to the hoses to find out where air is getting in.
Additionally, you can do the following:
- Expel air from the system. When this work is carried out, bubbles form on the surface of the liquid. In order for them to burst, it is necessary to rotate the steering wheel with the engine off.
- Install a new hose connecting the pump to the reservoir using an oil resistant sealant.
- Replace the sealing gasket on the supply in the tank.
Another repair method is to replace the sealing ring in the high pressure pipe of the hydraulic booster (if necessary, you can replace the hose itself, as well as both clamps). Over time, the O-ring loses its elasticity, as a result, the tightness is broken, and the air entering the system passes through, forming foam and causing knocking. Troubleshooting consists in replacing the sealing ring. Sometimes the problem arises due to the lack of selection of a suitable ring. If, nevertheless, the ring was found, then it should be replaced by installing it on the mount and treating it with an oil-resistant sealant.
For some cars, there is a special power steering repair kit in the distribution network. If there are problems with this mechanism, you first need to purchase a repair kit, and replace the rubber gaskets included in the kit. It is advisable to purchase original sets. This is especially important when repairing expensive foreign cars.
The presence of dirt in the liquid of this system should also be monitored. If there is dirt, even in small amounts, then over time this leads to increased wear of the pump elements and the hydraulic booster as a whole, as a result of which it will create unpleasant sounds and work less efficiently. This is usually expressed in an increase in effort when turning the steering wheel, as well as the occurrence of a knock. Therefore, after replacing the fluid, it is necessary to check for dirt at the bottom of the tank. If it exists, then you need to immediately take measures to remove it. It is also necessary to check the presence of a filter in the tank.
It must be free of dirt and damage, and must also be hermetically sealed to the tank. Sometimes it is advisable to replace the entire expansion tank together with the filter at once, instead of cleaning them. Also, at the same time, it is necessary to dismantle the rail, disassemble it, flush it, replace plastic and rubber products. To do this, you must apply the previously discussed repair kit.
An unpleasant hum can be created by the external bearing of the power steering pump. Its replacement is carried out without much difficulty, and without a complete disassembly of the mechanism. But sometimes it is difficult to find such a bearing for sale.
There are special additives for mixing them with power steering fluid. They are able to eliminate the unpleasant sound of the pump, reduce the force on the steering wheel, increase the clarity of the hydraulic booster, reduce the vibration of the pump, and prevent the mechanism parts from rapid wear when the oil level is insufficient. But car owners are distrustful of such chemicals. In some cases, they help, while in others they create harm and speed up the time to replace the entire power steering pump.
When selecting a liquid, attention should be paid to temperature parameters so that it can be used in severe frosts. Oil with a high viscosity creates obstacles for the functioning of the hydraulic booster in normal mode.
Power steering hums when warm
If the hydraulic booster creates an unpleasant hum when warm, then there can be many malfunctions. Let's look at a few situations and how to get out of them.
- Faulty steering rack. During heating, the liquid reduces viscosity and can pass through the seals if they are damaged.
- If low-quality fluid is poured into the power steering system, this leads to loss of its viscosity when heated resulting in the pump not being able to deliver the required pressure. The solution is to replace the oil with the original brand, having previously flushed the system and pumped it with fresh fluid.
- When a knock appears on a hot engine at low speeds, at high speeds the sound disappears. This means that the pump is out of order and needs to be replaced. There are two solutions here - replacing the pump, or replacing the high viscosity fluid in the power steering system.
- If the steering wheel vibrates when the engine warms up, then you need to replace the pump, or repair it using a repair kit.
Power steering fluid is recommended to use the original manufacturer, judging by the experience of car owners. When using low-quality fluid, the hydraulic booster elements quickly become unusable, which will entail costly repairs.
Power steering hums in left and right position
You need to know that with the wheels turned all the way, the power steering pump operates with the greatest load. Therefore, extraneous sounds are created that do not indicate signs of any problems. Many car manufacturers inform about this in their manuals. In this case, it is important to distinguish sounds associated with breakdowns in the system from other sounds.
If there is confidence that the resulting noise caused the malfunction, then you need to perform diagnostics. The main reasons that the hydraulic booster began to buzz in the final positions are those that were considered by us earlier. This means that you need to check the operation of the pump, the amount of fluid in the tank, the amount of tension in the power steering belt, the transparency of the fluid and the presence of contaminants in it. Other situations are also possible.
It often happens that a valve box is located at the top of the gearbox, which serves to control hydraulic flows. When the steering wheel is turned to the end position, the hydraulic flow is closed by the bypass valve, as a result, the liquid flows already in a small circle. In this case, the pump operates on its own, without cooling. This situation negatively affects him and leads to a serious problem. For example, scoring may occur on the pump gates or on the cylinder. In winter, when the liquid is thicker, this is more relevant. Therefore, the wheels should not be kept in the fully turned position for a long time.
Power steering hums after fluid change
This mechanism may hum if a fluid change has been made. Unpleasant noises can be caused by the pump if too thin oil is filled in than necessary. Between the rotor plates and the stator ring, the gap gradually increases due to wear of parts, the plates vibrate due to stator irregularities.
It is also possible the appearance of extraneous sounds when installing new power steering hoses. The reason may be a poor quality hose. Some workshops replace the special high-pressure hoses with regular hydraulic hoses. This causes air to enter the system and the appearance of extraneous sounds. Other reasons are similar to those discussed earlier.
- Constantly monitor the serviceability of the steering rack, its oil seals and anthers. This extends its lifespan and saves money.
- In the event of malfunctions and the occurrence of extraneous sounds, repairs should be carried out quickly. This will protect the car from accidents.
- When parking the car in the parking lot, the wheels must be placed in a level position. This reduces the load on the power steering the next time the engine is started. This is especially evident in winter when the oil is thick.
- Do not hold the wheels in the turned state for a long time, as this adversely affects the pump running without cooling.
- Monitor the oil level in the hydraulic booster, change it in a timely manner and top up. You should also check its quality. There is always the possibility of acquiring low-quality oil, which quickly becomes unusable.
Every third driver once begins to hear a rumble from the hydraulic booster. This noise indicates that something in the mechanism is damaged or worn out, and this is all fraught with consequences. To check what exactly the problem is, you need to diagnose and determine why the power steering buzzed.
What to do if the power steering is buzzing
Power steering (or power steering)- a complex design that creates the right force so that you easily turn the steering wheel. Despite the rather complicated device, you can figure out the causes of the breakdown yourself. For repairs, most likely, the services of professionals will be required, but experienced drivers can handle it on their own.
Is this noise bad for the car?
Any hum or excess vibration is harmful to the machine. The consequences of all this can be very different, but you will have to pay for everything. Another question is what price. For example, if the power steering pump is buzzing, then the pressure hose may leak, which as a result may even break. This can cause hydraulic fluid to enter the exhaust manifold and ignite, causing the entire machine to catch fire.
Causes of buzz
There may be several reasons why the power steering is buzzing. When diagnosing, check the following items.
Low fluid level
A special oil is poured into the power steering reservoir - ATF (Automatic Transmission Fluid). The level of this fluid may drop due to poor tightness of seals, connections, and hose rolling. Open the hood and check the level of this oil in the reservoir. If the level is insufficient, then you must first eliminate the cause of the leak, and then replace all the oil.
Important! The loss of hydraulic fluid begins asymptomatically. First, the oil flows out through the steering rack end seal, but the boot prevents it from flowing out. If there is fogging near the anthers, then you need to urgently find out the cause.
Liquid quality
Due to long-term operation, hydraulic oil is burnt, diluted and contaminated. That is, sometimes it needs to be changed, and at least once every two years or every 70-100 thousand km. The quality of the liquid can only be determined "by eye". Open the reservoir, take a drop of ATF oil and put it on a sheet of white paper. If everything is fine with the oil, its color will be burgundy, raspberry or red. The fluid needs to be replaced if it is brown, dark brown, or black. If the smell of burnt rubber or burnt oil is heard from the tank, then the fluid also needs to be changed.
Steering rack failure
A hum in the power steering may also appear due to problems with the steering rack. To check, you need to diagnose the rail and the power steering itself. The rumble from the steering rack can come from the knock of the rod on the body or because of the worm pair. The solution to the problem is repair, in extreme cases, the replacement of the rail.
air system
If air has entered the hydraulic system, you will hear howling and grinding. Air could enter the pump through the fluid supply hose due to cracks or a loose connection between the hose and the expansion tank. The second reason is a clogged filter screen in the expansion tank itself. Because of this, the liquid there will foam and boil. In the expansion tank, the liquid should not boil, it should flow freely. Air could get in when replacing any parts. Adding fluid does not solve the problem. The system needs to be flushed, the fluid replaced, the system bled. After that, the air should come out completely.
Drive belt wear
If the power steering starts to hum while turning the steering wheel, then the reason is the drive belt, which is worn or loose. Tighten it or install a new one.
Pump failure
The most unpleasant breakdown, and the most financially costly, is the breakdown of the power steering pump. Failure can occur due to worn bearings or seals, a broken pump impeller. If the pump is broken, then you can hear not only a hum, it will also be reflected in the steering wheel - it will be more difficult to turn it. For diagnostics, you need to go to the service station to professionals.
Power Steering Tips
Power steering, like any other vehicle unit, needs to be serviced periodically. No automaker gives special recommendations. All you need to do with the oil in the power steering is to check its level, but do not change it, and if necessary, supplement the missing volume.
The frequency of replacement depends on the intensity of use of the vehicle. The norm is once every 2 years.
For power steering, use only the oil recommended by the automaker specifically for your car model. Don't buy cheap oil. If it so happened that the oil leaked, and somehow you need to get to the service station, then you need to pour automatic transmission fluid into the tank along with engine oil. Do not use mixtures of different types of hydraulic oil for continuous operation of the hydraulic booster.
If you do mix oils, you must flush the entire system before putting new oil into the system so that it does not mix with the rest of the mixture. Flushing the system is required! Wear products form vapors that clog the calibrated bores and are an abrasive material that contributes to the wear of mechanisms.
Be sure to watch the power steering pump drive belt. If there are problems with it, then a squeak will come from under the hood. The problem could be a worn pulley or belt, or a broken pump. Do not tighten the belt again - the pump will work even less.
Curbstones, or rather hitting them, is a problem for owners of cars with power steering. It doesn't have feedback, so you won't get full steering information, meaning you don't always understand what's going on with the wheel. When you jump on the curb, you will feel a slight push, not a strong jerk. The power steering pump can produce high pressure to hold the position of the steering rack. The wheels will be fixed, that is, the impact will be hard. As a result, you can get destroyed gears, drives, steering rod joints, even a jammed or deformed steering rack. A similar situation occurs if you press too tightly against the curb. The power steering will instantly respond to the steering wheel, and if the wheel is limited in movement, then there is no need to put pressure on the steering wheel.
Never step on the gas if you are waiting for a parking space to be vacated. At the same time, the wheels are turned out at a large angle, and the wait takes more than half a minute, so the pressure in the power steering system increases significantly. This is fraught with blown or deformed sealing elements or a broken pump. The working fluid may also overheat, and this will degrade performance.
In winter, in frost, you cannot start on a “cold” engine, since the working fluid is too viscous, that is, it will not reach the valves, calibrated holes, in general, increases the load. There are many reasons why the power steering is noisy, but the result is the same - a non-working car. To prevent this, pass the diagnosis in time. Good luck on the roads!
The power steering is designed to create acceptable driving conditions by easing the effort on the steering wheel. Initially, these mechanisms were installed exclusively on trucks and agricultural machinery. The amplifier was not an element of comfort, its installation was a necessity, since without this node it is simply impossible to turn the steering wheel of a truck or other large equipment. takes on almost all the load that occurs when controlling the rotation of the wheels. The diameter of the steering wheel directly affects the responsiveness of the mechanism. If the car is equipped with a smaller element, turning the wheels from lock to lock will require less speed. In this article we will talk about what to do if the power steering is buzzing. Before proceeding to troubleshoot the problem, let's consider in more detail its design and principle of operation.
Power steering device
There are many different modifications of the hydraulic booster. Thanks to this, its installation can be made on almost any steering mechanism. The most common wheel control system for cars manufactured in 1980-2000 is a rack and pinion mechanism. Most modern models are equipped with electric power steering. The design of the rack amplifier includes the following main elements:
Steering gear , meaning the main control unit without an amplifier.
R dispenser sets the direction of oil flow into a special cavity of the hydraulic cylinder and returns it back. Distributors can be axial or rotary. The first performs translational movements, the second - rotational.
Pump creates the necessary pressure inside the system for the circulation of the working medium.
Tank - a container for the working fluid that circulates in the system. It has a special filter for cleaning the working environment and a dipstick for checking the oil level.
Various connecting elements, tubes and adapters.
In the design of the electric hydraulic booster, in addition to the elements described above, there is an electric control unit and a solenoid valve. The oil pump, which creates the necessary pressure in the system, is in most cases mounted on the engine block. Its drive to work is realized by means of a conventional belt drive. The distributor and the power cylinder are presented as a single integral element in the steering rack.
The principle of operation of the power steering
The pump starts working after the engine is turned on and maintains the set fluid pressure in the booster system. Turning the steering wheel instantly affects the tracking device, the functions of which, as a rule, are performed by the torsion bar. It issues an actuating signal to the distributor mechanism, which then actuates the oil system pressure valve and one of the two valves of the power cylinder cavities. Each of them turns on when turned in its direction. The locking element creates pressure inside the system, thereby taking on the main load. In the absence of steering wheel rotation, the medium simply circulates in the system through the check valves.
If the steering wheel is turned all the way, the system creates maximum pressure on the piston of the power cylinder. To prevent breakage or rupture of hydraulic breaks, a safety valve is provided in the distributor. When the pumped-in oil has nowhere to go, the bypass opens and allows the oil to circulate freely through the system. As a rule, the activation of the safety valve is accompanied by a characteristic sound. Fluid is supplied all the time. For the integrity and long life of the system, it is not recommended to delay the steering turn for more than 10 seconds.
In the electronic power steering, the function of monitoring, supplying and adjusting the working fluid is performed by a solenoid valve, which is controlled by the ECU. The electronic amplifier reads data from a variety of devices, including sensors for speed, crankshaft rotation, steering angle, and so on. Based on the collected information, the control unit changes the level of pressure supplied to the cavity of the power cylinder, smoothly closes and opens the valves. At low speeds, EGUR does not interfere with the circulation of the working flow through the system. When picking up speed, it begins to gradually close the valves, that is, to reduce the pressure of the working environment, thanks to which the steering wheel becomes more informative.
Video from "Main Road" - Power Steering
What to do if you hear the hum of the power steering
The lack of regular technical inspection and timely replacement of consumables causes a lot of unpleasant consequences during the operation of the car. Next, we will consider the main malfunctions when the power steering is buzzing and how to fix them.
The causes of hum or noise in the power steering can be:
Critical working environment . If the oil begins to foam, this means that air has entered the suction line. To remove it, you need to bleed the system. To do this, we start the car and turn the steering wheel from one extreme position to another several times. Do not hold the steering wheel in the extreme position for more than 5 seconds. Sometimes the problem may lie in the quality of the fluid. To replace, you need to pump out the existing fluid using a syringe with a thin tube and fill in a new one. If bubbles are noticed, let the liquid settle, and then turn the steering wheel.
Power steering rack failure . Bearing wear can also cause the symptoms described above. To fix this problem, you need to completely replace the damaged elements. It will be extremely difficult to visually determine the bearing defect, it is better to remove the belt and check each one by touch.
Pump malfunctions , as a rule, happen due to the wear of individual elements of the device. The failure of the working surface of the pump blades cannot be corrected; this entire segment of the system will have to be replaced.
Worn or loose drive belt hydraulic power steering system. Check the belt, if its condition is satisfactory and there are no visible defects, it may need to be slightly tightened.