Drive belt and pulleys

10 октября, 2021 от arto Выкл

Company DAYCO

The auxiliary aggregate drive is a complex system that is similar to the GDM drive system, but performs a completely different function. Auxiliary equipment drive belt drives a generator, providing power supply and charging battery, power steering and air conditioner compressor, and sometimes a water pump of the engine cooling system.


• Generator

• Light devices

• Power steering

• Battery

• Water pump

• timing belt

When should the drive belt change?

Each manufacturer sets interservice maintenance intervals of a particular car model depending on the modification and type of engine. The main criteria for determining the moment of replacing the belt — the car mileage or the service life of the product. For the service life of the drive belt directly affects the driving manner. Extreme loads — riding in the mountains, intense traffic in megalopolis or dusty areas, movement by car with a trailer — contribute to a faster belt wear. When identifying any damage, oil stains or the uncharacteric sounds of the belt should be replaced.

What will be required to replace
Drive belt?

To replace the drive of auxiliary aggregates, you must purchase:

• Drive belt auxiliary units

• Tensioner

• Crankshaft damper pulley

• Auxiliary pulley

• Pulley generator

• Water pump with sealing (if it is activated by this belt)

In most cases, it is enough to purchase a ready-made kit for replacing the drive belt designed specifically for a particular car.

Diagnosis of an old belt

Before installing a new belt, it is recommended to carefully inspect the old belt for abnormal damage — they may indicate a malfunction of the drive.

Breakdown ribs


• Distribution of cracks

• the presence of foreign bodies in the groove of pulleys


• Violation of the actuator


• Check that the belt is installed correctly, make sure that there are no foreign bodies in the plot of pulleys and in the correct operation of all transmission elements

• Replace damaged belt

Frelling a mixture of ribs


• Applying outsiders when installing a belt for pulleys

• Violation of the content between transmission elements

• Improper belt location on pulleys


• During the installation, thoroughly check the position of the belt in the transmission and make sure that it is properly fastening and aligning its hard components.

• Replace damaged belt

Reducing the cross section of ribs


• Insufficient tension during installation

• Excessive wear of the ribs pulleys

• Incorrect belt selection for this application (excessive belt length)


• Check the belt match for this application.

• Make sure that there are no signs of wear on rigid transmission elements, and that the belt tension corresponds to the value provided by the manufacturer

• Replace damaged belt

Cleaning pulleys

Another important stage is a thorough cleaning of all pulleys, including auxiliary.

The presence of contaminants can lead to erasing, excessive wear or noise even recently installed new belt. It is also necessary to check the engine protection from the bottom. The presence of damage on it or its complete absence opens the path of dirt and dust to the belt drive system.

Choosing the right belt

The characteristics and features of different polyclin belts Dayco indicate the letter notation in the article in the article (for example, S, DT, EE, PM, K. In the online catalog of the Garage section on DayCo website there is an opportunity to choose a strap on the brand, models and other car parameters . The directory is also available in the mobile version.

Installing a new belt

Before dismantling the old belt, it is useful to make a drive configuration scheme.

All the necessary schemes and instructions for replacing belts for different engine models are given.

On the website