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V ribbed belt for automobile
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Information - Drive belt
Poly V-belt: replacement and selection
When and why it is necessary to replace poly V-belt
Lifetime limit of the multi-rib belt is about 70 000 – 80 000 kilometers of mileage. At the same time, regardless to mileage its expiry date is about 5 years from the manufacture date, even if the part wasn’t used. Cracks, de-layering and abrasion of ribs and cord fibers can be noticed on a worn component. Apart from wear-out, its oiling can become the cause of improper operation of the part. Premature breakdown of the serpentine belt can be caused by its improper installation, particularly, insufficient tensioning, as well as defectiveness of rollers, pulleys and other drive elements.
You can understand that the multi-rib belt is defective by whistling sound from under the bonnet during driving. Often, this sign points out that the part is stretched and slipping on the pulleys. Tearing of the item usually comes with loud clap. In this case, operation of the equipment, which gained torque from the belt, stops and the indicator, signing about the fault, activates on the dashboard. One should take into account that the whistling sound after driving through a puddle or at heavy rain may follow operation of a non-faulty belt: in this case, the part temporary loses contact with the pulley due to moisture effect.
It is advisable to replace the part together with the tensioner and idler rollers. Procedure should be performed at a service station, because this work comes with removal of many components. Moreover, it is necessary to tighten a new belt properly. Such works require high qualification.
How to choose poly V-belt
The automotive drive belts differ by cross-section. For example, profile of the V-belt has trapezoidal shape. The double-groove belt is a double V-shaped belt. The six-ribbed belt has cross-section in the shape of six wedges at low profile height, which provides good contact with the pulleys and significant flexibility at the same time. Due to this, the part is more durable. Such parts are used on many middle-class cars. Vehicles of business and executive classes may have components with 10 wedges.
Hi-Tec poly-ribbed belts, notable for continuous lifetime are offered by well-known manufacturers, such as Contitech, Bosch, Dayco, SKF, Gates.
You should take V-ribbed belt markings into account during selection. Manufacturers use the next markings: PH, PJ, PK, PL and PM. Parts with different identification marks are different from one another by sizes, section parameters, minimum pulley diameter and maximal rotation speed. It is important to consider that the characteristics, matching to markings are not equal from different manufacturers, that is why you need to specify compatibility of various brands items during purchase.
Buying a drive belt, specify its manufacturing date. In the course of time, chemical contents of materials are changing, and the part, which useful time in ended, should be regarded defective.
How to replace poly V-belt?
As a rule, it is quite easy to replace the poly V-belt single-handedly if corresponding skills and experience are present. To do so you need to:
- Remove the battery from the car.
- Activate the parking brake mechanism.
- Draw or take a photo of the belt routing scheme.
- Loose tightening of the component by bypassing and blocking the tensioner.
- Remove the belt from the pulleys.
- Inspect the rollers, tensioner and pulleys visually, assess their condition, replace by necessity.
- Check coaxial alignment of the pulleys.
- Install a new belt, following the routing scheme adjusting its ribs with pulley grooves.
- Provide proper tensioning of the belt. For this, you need to unblock the automatic tensioner or adjust tightening manually, using the car manufacturer’s recommendations.
Is it possible to install poly V-belt of different dimensions on your car?
On your car you can install the poly V-belt of only those dimensions, which were presupposed by the manufacturer. It is impossible to mount too wide belt on the pulley. And correctness of tensioning greatly depends on the component length. If the belt is shorter than necessary, it will be tightened too much, so tensioning and idling rollers as well as auxiliary units bearings may quickly break down. The excessively long belt also can not be properly tensioned, so it slips. Moreover, during the component selection, it is essential that spacing and its teeth profile are equal to parameters of grooves of the pulley. In order to exclude mistake, manufacturers usually apply markings of length and ribs quantity on the outer surface of the parts.
Where to find diagram of poly V-belt installation for your car? What characteristics are noted in poly V-belt marking?
Usually, a diagram of poly V-belt installation can be found in the car technical documentation. But in order to understand it you need to familiarize yourself with abbreviations and reference letters of units and assemblies, which are driven by the belt. Most car manufacturers use the following abbreviations:
- AC – the air-conditioner compressor;
- CS – the crankshaft;
- G – the idling roller;
- T – the tensioning roller;
- F – the engine cooling system fan;
- PAS – the power steering pump;
- GEN – the alternator;
- SC – the supercharger;
- VP – the vacuum pump;
- WP – the cooling system pump.
Usage of the corresponding scheme significantly simplifies installation of the poly V-belt.
Quantity of grooves, perimeter length of the item, the component type and name of the manufacturing company are usually noted in the poly V-belt marking. For example, the next marking: Contitech 5 PK 1546, the sign “Contitech” means that the belt is made by the same-name German company; the digit “5” is used for marking of grooves quantity, letters “PK” note that the belt is poly ribbed, and 1546 is length of the part in millimeters.
Best goods: V ribbed belt
- Length [mm]: 975
- Number of ribs: 6
- Material: Rubber
- Width [mm]: 21,36
- Parameter: 6PK975
- Thickness [mm]: 4,45
- One-sided/Double-sided: One-sided
- Colour: black
- Belt Material: EPDM (ethylene propylene diene Monomer (M-class) rubber)
- Tensile Cord Material: Polyester
- Condition: New
- Length [mm]: 800
- Number of ribs: 6
- Material: Rubber
- Width [mm]: 21,36
- Parameter: 6PK0800
- Thickness [mm]: 4,45
- One-sided/Double-sided: One-sided
- Belt Material: EPDM (ethylene propylene diene Monomer (M-class) rubber)
- Colour: black
- Tensile Cord Material: Polyester
- Condition: New
- Length [mm]: 905
- Number of ribs: 6
- Material: Rubber
- Width [mm]: 21,36
- Parameter: 6PK905
- Thickness [mm]: 4,45
- One-sided/Double-sided: One-sided
- Colour: black
- Belt Material: EPDM (ethylene propylene diene Monomer (M-class) rubber)
- Tensile Cord Material: Polyester
- Condition: New
- Length [mm]: 1045,0
- Number of ribs: 6
- Material: Rubber
- Width [mm]: 21,36
- Parameter: 6PK1045
- Thickness [mm]: 4,45
- One-sided/Double-sided: One-sided
- Colour: black
- Belt Material: EPDM (ethylene propylene diene Monomer (M-class) rubber)
- Tensile Cord Material: Polyester
- Condition: New
- Length [mm]: 1123
- Number of ribs: 6
- Material: Rubber
- Width [mm]: 21,36
- Parameter: 6PK1123
- Thickness [mm]: 4,45
- One-sided/Double-sided: One-sided
- Colour: black
- Belt Material: EPDM (ethylene propylene diene Monomer (M-class) rubber)
- Tensile Cord Material: Polyester
- Condition: New
- Length [mm]: 1873
- Number of ribs: 6
- Material: Rubber
- Width [mm]: 21,36
- Parameter: 6PK1873
- Thickness [mm]: 4,3
- One-sided/Double-sided: One-sided
- Colour: black
- Belt Material: EPDM (ethylene propylene diene Monomer (M-class) rubber)
- Tensile Cord Material: Polyester
- Condition: New
- Length [mm]: 1708
- Number of ribs: 6
- Material: Rubber
- Width [mm]: 21,36
- Parameter: 6PK1708
- Thickness [mm]: 4,3
- One-sided/Double-sided: One-sided
- Colour: black
- Belt Material: EPDM (ethylene propylene diene Monomer (M-class) rubber)
- Tensile Cord Material: Polyester
- Condition: New
- Length [mm]: 976
- Number of ribs: 6
- Weight [kg]: 0,1
- Condition: New
- Length [mm]: 976
- Number of ribs: 6
- Condition: New
- Units/Pulleys: incl. tensioner pulley
- Packaging length [cm]: 26,5
- Packaging width [cm]: 16,5
- Packaging height [cm]: 9,5
- Weight [kg]: 0,684
- Condition: New
- Supplementary Info: G-Force™ C12™ CVT Belt
- Length [mm]: 1070
- Number of ribs: 6
- Width [mm]: 21
- Observe technical data
- Tensile Cord Material: Polyester
- Belt Material: Rubber
- Colour: black
- Condition: New
- Supplementary Article / Supplementary Info Info 2: with tensioner element
- Length [mm]: 975
- Housing material: Aluminium
- Track rollers material: Plastic
- Number of grooves: 6
- Weight [kg]: 0,734
- Belt Material: EPDM (ethylene propylene diene Monomer (M-class) rubber)
- Condition: New