Examination
1. Drive belts are V-belts. They are located on the left side of the engine and their condition and correct tension are very important for engine performance.
2. The number of drive belts on a vehicle depends on the equipment installed. One belt transmits drive from the crankshaft to the generator and water pump, and the remaining belts transmit drive to the air conditioning compressor and power steering pump.
12.3a Main forms of wear of drive belts
A. small cracks; b. Lubrication ingress; V. Attrition; d. Always check the underside of the belt
12.3b Check the belts for the following signs of wear - if the belt is worn, replace it
3. Check all drive belts along their entire length for cracks, material separation, frayed edges and signs of wear (12.3a and 12.3b).
12.4 Measuring belt deflection with a straightedge and bar
1. Plank; 2. Ruler; 3. Belt deflection; 4. Check that the ruler is perpendicular to the plank
4. To check the tension of the belt, push it with your thumb with a force of about 3 kg at a point located in the middle between the two pulleys, and check the deflection of the belt (12.4).
Adjustment
5. To carry out the adjustment, it is necessary to move the unit receiving the drive on the mounting bracket.
12.6 Move alternator to adjust belt tension
1. Adjusting bolt; 2. Water pump pulley; 3. Crankshaft pulley; 4. Generator mounting bolt; 5. Alternator pulley
6. On some units, this requires unscrewing the adjusting bolt and moving the unit as needed (12.6).
12.7 Loosen the locking bolt and tighten the adjusting bolt to adjust the belt tension
1. Regulator; 2. Adjusting bolt; 3. Locking bolt
7. On other units, the locking bolt must be unscrewed. Tighten the adjusting bolt for the correct belt tension and tighten the locking bolt (12.7).
Replacement
12.8 When installing the drive belt, make sure that it is installed exactly in the middle of the pulley
1. Correct; 2. Wrong
8. To replace the belt, loosen its tension and remove the belt from the pulleys. To remove some belts, you must first remove other belts. When installing a new belt, check that it is installed exactly in the middle of the pulley, and adjust the belt tension (12.8).