The maintenance of the system of belt drive of modern cars is one of the most common operations per service station. However, during its mechanics, and even quite experienced, annoying mistakes can perform. About how to avoid them, we will tell in this publication.

There is nothing surprising that when performing even such a common operation, as a replacement of a polyclinic belt of the aggregates drive, mechanics make mistakes. It is precisely this prevalence, if you want — the routine of the operation largely determines the attitude towards it and causes the occurrence of various problems, since it is carried out in most cases, as it is customary, «on the machine». Most often quite quickly, according to a template spent scheme. Therefore, when the mechanic eye, what is called, «closed», and the earnings directly depends on the speed of work, it ceases to pay attention to possible defects present in the system. Although they are them, especially on cars with impressive runs, often and provoke breakdowns up to the premature belt exit.

In this publication, with the help of experts of our magazine, we will once again deal with the optimal sequence of actions, making an emphasis on the most important and principal moments.

At the initial stage

First of all, as experts are recommended by Dayco, it is necessary to understand the differences between the types of belts to choose the most suitable for a particular application. On the characteristics and features of different polyclin belts DayCo indicate letter notation in the article article (for example, S, DT, EE, PM, K).

It is important to remember that when ordering a belt is not focused only on its size. It is necessary to inform the supplier of the car components of the vehicle to select a belt that will optimally comply with the requirements of operation on a specific engine model. In the on-line manufacturers directories, as a rule (premium suppliers of conveyors — always), there are various options for the selection of the belt: according to the vehicle brand, model and other vehicle parameters. Catalogs can be accessible in mobile versions.

In general, do not hesitate to contact the manufacturer’s website once again. There you can find a lot of useful information. For example, on the DayCo portal, you see the necessary schemes and instructions for replacing belts for different models of the engine. Surely they are on the resources and other companies.
In the modern high-tech world there is no too much information. It, on the contrary, is quite often lacking.

Systems are upgraded, changes are made in them. How to learn about all this in a timely manner? Only through the Internet. But it is necessary to work with information on the Internet very neat. Not the only one available for an independent one-time source of 100% reliable information is the sites of manufacturers. Therefore, we will repeat, do not neglect them, contact, check, explore.

It will not be superfluous, starting to dismantle the old belt, make a diagram of the drive configuration. So that later, considering, what are the vessels they now happen, do not get confused and do everything right.

In addition, before installing a new belt, Dayco technical experts are recommended to carefully inspect the old belt for abnormal damage — they may indicate a malfunction of the drive. For example, the worn back of the belt indicates possible failures in the operation of the system or on a partial or complete strap ripper in the drive; Washed or deep scratches, as well as damaged belt ribs, can be caused by faulty or excessively worn pulleys.

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The reason for the fallout of the resistive insert lies in an increased working tension, mechanical damage to the working surface of the pulleys (chips, scratches, etc.), due to the disruption of the alignment and contacts with the fixed element / mi. Reducing the cross section of the ribs occurs due to insufficient tension when installing, excessive wear of the ribs of pulleys and improper belt selection for this application (excessive length of the belt).

The deposition of foreign material in the belt grooves is possible when the material is detached from the side and its deposit at the bottom of the groove when the foreign material is hit between the belt and the grooves (usually sand), resulting in vibration or the noise level is raised.

As we can see, the dirt is one of the main causes of the whole bouquet of defects, so when servicing the belt drive system, it is always necessary before installing a new belt to conduct a thorough cleaning of all pulleys, including auxiliary. The presence of pollution in almost 100% of cases inevitably leads to abrasion, excessive wear or noise of the newly 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.

And of course, do not forget that the drive belts, as such, are not diagnosed in the context of their resource. They change when the mileage prescribed by the automaker is changed, and there is no reason to delay this replacement.

The timing belts are not diagnosed — they are changed by the service life or on a run, prescribed by the automaker. For wedge and polyclinic belts, you can carry out visual control of the belt state for defects and any damage and tension control. The polyclinic belts have the ability to check the wear of the working side of the belt cloth using a special template.

Getting to install

The installation of a new belt should be carried out in full compliance with the installation instructions from the automaker or from the service manual, such as Autodata. It is necessary to follow the instructions of the automaker and follow the sequence of operations, as well as apply the appropriate special tool where it is required.

By installing a new belt, position it properly on all pulleys to avoid fast damage. To check it is enough after the installation, turn the crankshaft pulley manually.

If the belt replacement is difficult, it is necessary to check the adherence to the correct sequence of its installation, as well as abandon the use of unsuitable tools in order to avoid the appearance of microcracks and premature belt destruction.

In general, strictly speaking, at the installation stage, it is the tool that plays a key role in many ways. Again, due to the extreme difficulty of many modern belt drive systems, it becomes quite difficult to perform the usual surgery. A special tool can provide post assistance.

Dmitry Osipov:

The entire gamma of the special tool for servicing the belt drives is divided into the instrument measuring and assembly. The types of measuring instrument are not so much — it is special rules for selecting wedge and polyclinic belts and appliances for measuring and adjusting the tension of all types of belts, but first of all the toothed (timing belts). There are also templates for measuring the wear of the polyclinic belt profile and a laser tool for determining the alignment / parallelism of the pulleys.

Mounting tools Great set: Special mandrels and filming for mounting and disassembling elastic polyclinic belts, sets for replacing the generator overtaking emissions, and of course, sets to replace timing belts on a wide variety of cars. There are specialized sets for cars of brands of the Volkswagen concern, Ford, Renault, cars of Asian brands (Japan and Korea), and, of course, universal sets.

Our company offers a high-quality German tool that is simply very nice to work: due to wellness and ergonomics, it allows you to perform routine operations for replacing and maintaining belt drives quickly and efficiently.

Some species can be made independently. However, the amateur creativity should not be abused, since the error price is too high, up to a total breakage of expensive system components.

Dmitry Osipov:

-Not, something from the tool can be made independently. For example, some simple mandrels and blocking pins to replace the timing belt on some engines. Copy more complex details will not work. This will not be released either with the measuring instrument — in handicraft conditions it will not be possible to achieve the required accuracy.

In this case, repeat, the maintenance of beltented drives on the majority of modern cars without a special tool is practically not possible. The exception is the replacement of a conventional drive belt of attachments, which in some cases can be produced, having the most basic set of a plumbing tool. But if an elastic polyclinic belt is used on the client’s engine, it is impossible to replace it without special devices.

The most common installation errors include non-compliance with tightening moments and replacing belts and components «on hot», that is, when the car engine has not yet cooled.

Dmitry Osipov:

If you install a new belt and components on a hot engine, then the belt tension can not be adjusted correctly, which will definitely lead to a significant reduction in the resource and service life of the drive components, and may entail the engine breakdown, if the tension is too weak. Well, non-compliance with the torque moments can lead to fastener breakdown, if the threaded connections are dragging, or to incorrect drive operation, if the fastener is not tightened and the rollers hang out.

Avoid most typical installation errors will allow the presence of a necessary special tool, the use of a dynamometric key, a clear compliance with the installation instructions and installation / replacement of components on the cooled engine.

Comprehensive replacement

In many cases, the most optimal solution for servicing the belt drive system is the complex replacement of the drive components using special repair kits. Kits include all the necessary drive elements — belt, tensioner, guiding roller.

According to Schaeffler’s specialists, in the last three years, the demand for repair kits for the replacement of timber vehicle with water pumps has grown more than three times.

They are sure because the frequency of maintenance is constantly increasing, it is not recommended to replace individual components for a long time. And when today at the service stations, carry out technical maintenance of the timing belt drives, it is best to replace the entire node along with a water pump, as it avoids the cost of subsequent repairs. InA Tensioner Kit bundle kits in the hands of auto mechanics are all the necessary components up to fastening bolts and gaskets, and if the thermostat is required with the necessary characteristics. Details can be compiled in a different way, due to which the repair solutions ina are optimally suitable for the complete replacement of drive nodes with one time and allow you to save time and labor costs of auto mechanics.

Here are such nomudinal rules and recommendations. Most of them, for sure, are well acquainted, but in everyday labor routine have already lost their importance. Therefore, just once again refresh them in your head and boldly proceed to work without making mistakes.