Typical signs of V-belt wear
1. Furrows on the sides; 2. Charring; 3. Cracking; 4. Detachment from the base; 5. Wiping (glossiness); 6. Oil ingress; 7. Tearing
Belt tension check
1. Ruler; 2. Bar; 3. Deflection
The engines use V-belts. Due to constant loads, over time, the belts stretch and their condition worsens. Therefore, belts should be checked periodically.
The number of belts installed on the car depends on the type of engine and on the vehicle equipment. Belts are used to drive the generator, coolant pump, air conditioner and power steering.
Examination
1. Stop the engine and open the hood to find the drive belts. Check the condition of the belts for signs of wear by lighting them with a flashlight. Check the condition of the belts on both sides.
2. Check the belt tension by the amount of deflection in the middle between the pulleys (see fig. Belt tension check). If the distance between the centers of the pulleys is 180-300 mm, the deflection should be 6.5 mm, and with the distance between the centers of 300-400 mm, the deflection should be 13 mm for V-belts and 6.5 mm for belts with a ribbed profile. The ruler should be perpendicular to the bar.
Tension adjustment
1. On all vehicles, to adjust the drive belt tension, move the unit along the bracket.
2. The belt is regulated by two bolts - axial (A) and regulatory (IN). To adjust, loosen bolt A and turn bolt B to move the idler roller or pulley, tightening or loosening the belt.
3. After adjustment, check the belt tension, if necessary, loosen the bolts again and adjust the tension. After completing the adjustment, tighten the bolts.
4. On cars of early releases, there is no movable tensioner roller with an adjusting bolt, the roller (or pulley) shifted by the auxiliary lever (crowbar).
Replacement
1. To replace the belt, follow the same preliminary procedures as for adjustment, and then remove the belt. All belts are recommended to be changed at the same time. Before removal, designate each belt and the corresponding pulley.
2. When purchasing, compare the new belt with the one being replaced.
3. Adjust belt tension.