Belt tension is checked by deflecting it between the alternator and pump pulleys or between the pump and crankshaft pulleys. Under normal belt tension, deflection A (pic. 2-61) under force 98 N (10 kgf) should be 10-15 mm, and deflection B - within 12-17 mm under the same force.
To adjust the belt tension, loosen the nuts securing the generator, move it away from the engine (to increase tension) or to the engine (to reduce tension) and tighten the fastening nuts. Turn the crankshaft two turns clockwise and check the belt tension.
The belt must not be over-tensioned so as not to cause an increase in loads on the bearings of the generator and the coolant pump.