BEARING, HUB, TENSIONERS There are no products in this category.



    Suspension auto parts: Wheel hub bearing Master-Sport Automobiltechnik (MS) GmbH - operation method, diagnosis, causes of faults and replacement intervals.

    Bearing serve to rotate the wheel on the hub with less resistance. They transmit the force applied to rotate the wheel on the axle. On the rear axle bearing modules are often used. When replacing the part, the module is entirely replaced. On the front axle there are installed angular contacts, conical roller, or radial bearings. It depends on the car model. To install and dismantle the wheel bearing a special tool is required. Therefore, it will be necessary to go to the car repair shop if the bearing is faulty.

    In course of time wheel bearings wear out. As the bearing wears out, the noise level increases. Especially loud noise is when cornering. Increased noise level when cornering to the left indicates a faulty on the right side. Sometimes a play can appear because of wear. This problem can be diagnosed. When you turn the wheel press once on the brake and once turn the wheels without brake. If the play occurs in the last case, the problem is with the bearing.

    If there is a faulty, you need to replace the bearing. To repair it you need a special press to press a new bearing in. Do not try to replace the bearing by yourself using a sledgehammer. A defective bearing must be timely replaced as it is dangerous to drive with a faulty bearing. In our Internet shop you will find any spare parts you need for your car: wheel brake cylinder, master cylinder, steering knuckles, brake shoes, window lifters, headlights, air dryer, fuel and oil filters.

    How to detect malfunctions of the wheel hub bearing kit

    Check the condition of the bearing when brake pads are replaced, regardless of the vehicle mileage. The state of this component may be checked in several ways. At a speed of 10 - 15 km/h, make a sharp left turn. If the extraneous noise is not heard anymore, it indicates a fault in the bearing of the left wheel. Then check the right wheel the same way. More thorough diagnostics requires special equipment.

    You will need a lift or a jack. Lift the vehicle, start the engine, switch to the fourth gear, and increase the speed up to 80 km/h. Next, engage the clutch and disengage the gear, carefully listening to the sound the source of which will be located in one of the wheels. You may try another method. Swing the wheel on the suspended vehicle first vertically, and then horizontally. Presence of even small free play is an indication of malfunction in the bearing, or in the steering system. Next, you will have to simultaneously press the brake pedal, and swing the wheel vertically (you will need an assistant). If the free play disappears, the component is to be replaced.

    You may notice that the Hub bearing needs diagnostics by the following symptoms:

    • knocking and increased vibration during movement;
    • vehicle straying from the straight path;
    • the body inclines during braking or in sharp turns;
    • extraneous noises;
    • wheel rims get overheated;
    • tires wear out unevenly.

    The reasons of wheel hub bearing kit malfunctions

    The main reason of the wheel hub bearing fault is driving on poor quality roads: the component is exposed to high loads, and cracks and chips may appear on it.

    The wheel hub bearing has a rather long service life. Its premature wear may be caused by using inappropriate lubricants, or excess or lack of the lubricant. Besides, the service life of the component may be shortened due to ingress of dirt, abrasive particles, and water. It can also be affected by poor quality of the part and inappropriate installation. Incorrectly adjusted clearance may be the reason of component displacement, and, as a consequence, its damage. Improperly balanced wheels can also cause loss of the bearing operability.

    Replacing the Wheel bearing kit

    The wheel hub bearing should be replaced after every 130-190 thousand kilometers of mileage. Please note the following recommendations:

    • observe the clearance when the tapered bearing is installed;
    • during replacement, do not use sharp objects, as they may damage the component.
    • when installing the component on the axle, use a mandrel for applying force to the inner ring;
    • when pressing the bearing in, use a mandrel to apply pressure to the outer ring.

    Belt / Chain Drive auto parts: Tensioner pulley v-ribbed belt Master-Sport Automobiltechnik (MS) GmbH - operation method, diagnosis, causes of faults and replacement intervals.

    Tensioner is a device to tension the V-belt. Specifically we speak about the arm to adjust the tension on the support roller. As a rule, both car parts are sold together and named tension pulley. In order the V-belt’s tension to be optimal it should be under a slight pressure. While all other rollers of the system are fixed, the tension roller can be adjusted with the help of the tensioner. Due to this it is possible to optimize the belt running.

    Normally, tensioner and support roller can be replaced individually. The majority of the tensioners used today are semiautomatic. This means that the primary stress is adjusted, for example, when the belt becomes longer because of the wear. If the regulator does not work semi automatically, it must be adjusted manually with the help of the tensioner. If the V-belt is slipping or running unevenly, the reason for that may be defective tension roller or tensioner.

    In majority of cases it is necessary to replace both car parts. As we speak about an extreme accuracy, all repair works should be done in a repair shop. An improperly adjusted V-belt can break and result in a bigger harm, for cylinder head gaskets for example. Buy a high-quality tensioner in our online store and you will save on repair. In our Internet store you will also find track rod, tappet and protective pipe, ESP sensor, support bar, wheel bearing, tensioner, taillights and many other car parts. The maintenance or repair of your vehicle will be easier and cheaper if you will compare prices in our online shop.

    How to identify a faulty poly-V-belt tensioner pulley

    The component should be checked for damage every time the belt is slackened, or at the end of the belt's service life. Correct operation of the tensioner pulley guarantees that the belt will operate longer, will not break or wear off.

    You can easily diagnose this component yourself. Just rotate it manually. If no noise is heard, gaps do not appear during rotation, and rotation is not jerky, it means that the pulley operates correctly. If during the inspection you find the faults mentioned above, the component is to be replaced. It is recommended to install a new pulley also together with each scheduled replacement of the poly-V-belt.

    You may notice that the poly-V-belt tensioner pulley requires diagnostics by the following symptoms:

    • the rotating component produces unusual noise;
    • the poly-V-belt is too loose in the pulley;
    • the belt moves too slowly in the pulley;
    • axial play occurs during pulley rotation;
    • the component gets heated during operation;
    • the belt is loose or broken.

    Reasons of poly-V-belt tensioner pulley malfunctio

    The main reason of mechanical damage of the component is its improper installation or displacement which may occur due to a strong impact during an accident.

    Excessive or insufficient tension of the poly-V-belt is the main reason of the pulley misalignment. Incorrect load direction in the process of rotation results in deformation of the component's fasteners and abrasion of its surface.

    Premature wear of the part is often caused by corrosion of the bearing installed inside. During operation, moisture and abrasive particles may get into the bearing, which results in rust and jamming of internal components of the pulley. Poor quality of the component also greatly reduces its service life.

    Replacing the poly-V-belt tensioner pulley

    You can replace the component yourself, or have it replaced at a service station. This operation is not very difficult. To replace the pulley, you'll have to:

    1. Loosen the belt and the mounting bolts of the tensioner pulley.
    2. Mark the rotation direction on the belt. This will ensure correct installation.
    3. Remove the belt.
    4. Remove the tensioner.
    5. Unscrew the pulley itself.
    6. Install a serviceable component.
    7. Return the belt to its original position.
    8. Adjust the belt tension according to the vehicle documentation.
    9. Check whether the tensioner pulley operates correctly.

    Bearings car parts Master-Sport Automobiltechnik (MS) GmbH - all important information about operating method, mounting, diagnostics and service life

    Bearings are assemblies which are used to fix axles and shafts in place while allowing them to rotate. They receive and transfer the load to other moving elements of the structure. They are used in many automotive parts: from wheels to alternators.

    Design of bearings

    In modern cars, you may come across rolling and plain bearings. The former are used in wheel hubs, shock absorbers, compressors, pumps, and other moving assemblies. The latter are more common in engines, starters, and turbochargers.

    All components regardless of their operating principle differ by the type of loads they are exposed to, which affects their design. For example, radial roller bearings consist of outer and inner races which are used to join different vehicle assemblies together. The inner surfaces of the rings are fitted with grooves along which rolling bodies (balls or rollers) move. In most cases, there is a separator with holes for the rolling elements between the rings. Thrust bearings have a similar design but instead of races, they have upper and lower rings between which the balls and rollers move.

    Plain bearings don’t have any rolling elements. They consist of a housing, often separable, with a bushing made of anti-friction material. They have oil inlets and oil supply passages. The shaft inserted into the bushing doesn’t come into contact with it as the gap between them is filled with oil.

    Maintenance tips

    • Replace covers, seals, and o-rings on time. These components are very sensitive to contamination and lack of lubricant.
    • Use special tools (drivers and extractors) to mount and dismantle the parts. Otherwise, you risk damaging assembly components or their mounting seats.
    • In most cases these components are disposable. They should not be reinstalled.
    • Do not overload your car. This will expose many suspension components to high loads.
    • In the belt drive systems, make sure that belts are properly tensioned and pulleys are correctly aligned.
    • Shift to neutral when you are stuck in a traffic jam or stopped at a traffic light. That will help you extend the service life of bearing assemblies used in the clutch system.
    • Change oil in the engine on time. Components which ensure the rotation of the crankshaft and camshaft have the same lubrication system. If their channels get clogged, these assemblies will fail prematurely.

    Malfunction symptoms

    Deterioration of the separators, cracks, or fatigue wear of the raceways are indicated by crunching and humming noises that arise when the assembly is in use. In some cases, the mechanism starts jamming. Sometimes the parts overheat. Oily stains around the assembly are the sign of damaged seals and O-rings. If wheel hub bearings have deteriorated or get stuck, the vehicle can deviate from its path. Uneven tyre wear can be also observed.

    Malfunction causes

    The use of inappropriate lubricants, as well as an excessive or insufficient amount can cause the parts to fail. Excessive vibrations, for instance of a camshaft, lead to dislodgement from the bushing which is dangerous for the latter. High loads also cause wear and tear of the components.

BEARING, HUB, TENSIONERS There are no products in this category.


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