24. SERVICE PROCEDURE 24.6.5 CHECK FAN BELT AND ALTERNATOR BELT TENSION, ADJUST Checking The belt should normally deflect by about 6 mm (0.24 in) when pressed with the finger (with a force of approx. 6 kg (13 lb) at a point midway between the alternator pulley and fan pulley. Tensile force when using tension gauge: 60 – 65 kg (132.3 – 143.3 lb) Adjusting 1. Loosen bolts 1 and 5 holding the alternator in position. 2. Tighten adjustment nut 3 until there is no clearance at retainer 2 . Be careful not to continue to tighten the adjustment nut after the clearance becomes 0. 3. Tighten bolt 1 . Tightening torque: 53.9 – 122.5 N·m (5.5 – 12.5 kgf·m, 39.8 – 90.4 lbft) 4. Tighten mount bolt 5 .
Tightening torque: 98 – 122.5 N·m (10 – 12.5 kgf·m, 72.3 – 90.4 lbft) 5. Tighten locknut 4 . 6. Check for damage to the pulleys, and wear of the groove and belt. Be particularly careful to check that the belt is not in contact with the bottom of the groove. 7. If the belt has stretched and there is no allowance for adjust- ment, or if it is cut or cracked, replace the belt. 8. After replacing the belt, operate for one hour, then adjust again. 3-54