Typical wear patterns of V-belts
1. Stripe side wear
2. Charring 3. Cracks 4. Layering 5. Glossiness 6. Oiling 7. Tearing |
Typical wear patterns of corrugated profile belts
1. Acceptable
2. Cracks 3. Unacceptable 4. Loss of 2 or more ribs 5. Parallel cracks |
Examination
1. The number of drive belts depends on the vehicle equipment. The V-belts are used to drive the alternator, power steering, coolant pump and air conditioner. One belt is usually used to drive several units.
2. Open the hood and check the condition of the belts on both sides with your fingers, twisting the belts (see fig. Typical wear patterns of V-belts).
3. Check the belt tension by measuring the amount of deflection in the middle between the pulleys. If the distance between the centers of the pulleys is 180–300 mm, the deflection should be 6.5 mm, and if the distance between the centers is 300–400 mm, the deflection should be 13 mm (1 - ruler, 2 - bar, 3 - deflection) for V-belts and 6.5 mm for corrugated belts (see fig. Typical wear patterns of corrugated profile belts).
Adjustment
1. The belt is adjustable with two bolts - adjusting (IN) and axial (A), which must be loosened and displaced by the roller or pulley of the moving part. After adjustment, check the belt tension, if necessary, loosen the bolts again and adjust the tension. After completing the adjustment, tighten the bolts without applying much force.
2. On cars of early releases, the adjusting bolt is missing and 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.
2. Before removal, designate each belt and the corresponding pulley.
3. When purchasing, compare the new belt with the one being replaced.
4. Adjust belt tension.