V Belt / Fenner Belt for auto

Belt drive auto parts: V Belt / Fenner Belt

Poly-V belt is a V-belt with longitudinal edges. This increases the frictional force. Poly-V belt is used to start the generator. Also it is used for water pump, servo-assisted steering gear, and fan. V-belts are made from rubber. Inside the belt there is a steel rod that is responsible for consistency of operation.

A common cause of failure is the poly-V belt break. Diagnosis of the faultinesses is carried out depending on the location of breakage. If the poly-V belt fails, it is easy to determine the cause. Before break formation there are characteristic noises caused by wear. It is necessary to replace the belt to avoid failure. You should always watch over the belt state. Defective poly-V belt indicates engine overheating.

The main poly-V belt starts the generator. It is not difficult to replace the belt, but it is hard-to-reach. First, you need to sort the tension out, and then to remove the damaged belt. When attaching the new V- belt, tension should be the same as pulleys’ overloading is possible. It is necessary to test the belt when the engine is on. In our catalogue you find many car parts: generators, moldings, horns, stub axles, parking brake cable, rear-view mirrors and ABS sensors. In our Internet shop you will buy quality goods and save money.

How to detect the V-belt malfunction

Diagnostics may be performed without help of specialists of a service center. Start with removing the cover and loosening the fasteners of the pump. Then inspect the belt for external faults and check the extent of its tensioning. When pressed, its maximum allowable deflection should be 5 mm. The surface of the component should not have any defects, or traces of fuel or lubricant. If the component has stains of oil, it should be replaced, and the oil seals are to be inspected. The alternator tensioner bolt and all fasteners are also to be diagnosed. It is recommended to inspect the belt after every 1,000 km of mileage.

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

  • operation of the engine is accompanied by extraneous sounds;
  • the engine gets overheated at idle speed;
  • signs of wear are visible on the surface of the belt;
  • the cold engine operation is unstable.

The reasons of V-belt malfunction

The most likely reason of V-belt breakage is its incompatibility with the power of the drive. The component may also break due to jamming of the drive, or under the action of foreign objects. Besides, improper installation of the belt with excessive force applied may result in cords damage.

Abrasion of the side faces of the component is most often the consequence of its insufficient tension. Also, the reason may lie in pulleys misalignment, their insufficient diameter and mismatch of the width of the pulleys to the belt.

The base of the V-belt may be damaged due to sharp temperature changes, or exposure to chemicals. This entails loss of stiffness of the material. Also, cracks may appear due to incorrectly installed or non-conforming outer roller.

Belt twisting and slipping may be caused by its insufficient tensioning. Due to excessive vibration, the component changes its position. Belts are often twisted due to pulleys misalignment or damage, and ingress of foreign objects into their grooves.

The premature wear of the components is often associated with their poor quality. It is recommended to use belts from the same manufacturer, and replace them together. Use of components with different characteristics may result in their uneven stretching and damage.

Replacing the V-belt

The V-belt is not subject to repair; it is replaced immediately, since a new component is relatively inexpensive. Since replacement does not require any special equipment or skills, you may be able to replace the component on your own. Before replacing, remove the cover, loosen the adjusting bolt and the pump fastenings in the cooling system. Then carefully remove the old belt, trying to avoid damaging the tension rollers, and install a new one.

At the end, remember to tighten the bolt and adjust the belt tension.

Popular V Belt / Fenner Belt manufacturers
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