Vehicles are equipped with specially designed belts that should only be replaced with belts of the same type.
The number of belts used on a vehicle depends on the equipment installed. Belts are used to drive the alternator, power steering pump and air conditioning compressor. Depending on the location of the pulleys, one belt can be used to drive several units.
Pic. 2.7. Location and location (A) alternator drive belt deflection measurements: 1 - generator pulley; 2 - adjusting bolt
The location of the belts on the engine is shown in fig. 2.7, 2.8, 2.9, 2.10.
Pic. 2.8. Location and location (A) measuring the deflection of the alternator drive belt and the power steering pump: 1 – a pulley of the pump of the amplifier of a steering
Pic. 2.9. Location and places for measuring the deflection of the V-belts of the generator drive (A), A/C compressor and power steering pump (b): 1 - adjusting bolt; 2 – a bolt of an adjusting lath; 3 – an air conditioner compressor pulley; 4 – a pulley of the pump of the amplifier of a steering
Pic. 2.10. Place for measuring the deflection of the alternator drive V-belt (A) and air conditioning compressor (b): 1 - drive pulley; 2 - locknut; 3, 4 - adjusting bolts; 5 – a bolt of an adjusting level; 6 – an air conditioner compressor pulley
Turning the engine crankshaft, turn the V-ribbed belt a few turns and visually check its condition. Only in this way can all surfaces of the V-ribbed belt be seen, since often the belt has only one, but a deep crack, which, when checked, can be located exactly on the pulley. If there are any defects, replace the V-ribbed belt immediately.
The tension of each belt is checked by measuring the deflection by pressing the belt centered between the pulleys (at the points indicated by arrows in Fig. 2.7, 2.8, 2.9, 2.10). Press firmly on the belt with your thumb and measure the deflection of the belt with a ruler.
Tension (and weakening) The belt is adjustable with a tensioner. The fastening of each engine unit is carried out by adjusting and pivot bolts, which must be released to move the unit. The tension of the power steering and air conditioning compressor drive belt is adjusted by turning only the idler pulley adjusting bolt. Loosen idler lock nut before adjusting and tighten after adjusting.
After loosening the bolts, move the unit away from the engine to increase the belt tension or towards the engine to loosen the belt tension. While holding the machine in this position, check the belt tension. If the tension is correct, carefully tighten the two bolts, then recheck the tension. To move the unit when adjusting the belt tension, you can use the mounting blade. Use it very carefully so as not to damage the unit being moved or the element used as a stop.
To replace, loosen the old belt and remove it from the pulleys. If two belts are installed, the belt farthest from the engine must first be removed from the engine, even if it does not need to be replaced. Install a new belt and adjust its tension, keeping in mind that the tension of the new belt is different from the tension of the used belt. After a short run of the car, recheck the belt tension.