Charging System

Alternator Belt Inspection and Adjustment

Deflection method:
Apply a force of 100 N (10 kg, 22 Ib) and measure the belt deflection between the alternator and the crankshaft pulley.

Deflection: 7.0-10.5 mm (0.28-0.41 in)

NOTE:
• On a brand-new belt (one that has been run for less than five minutes), the deflection should be 5.5-8.0 mm (0.22-0.31 in) when first measured.
•   If there are cracks or any damage evident in the belt, replace it with a new one.

Tension gauge method:
Attach the belt tension gauge to the belt and measure the belt tension.
Tension: 343-490 N (35-50 kg, 77-110 (b)
NOTE:
•   On a brand-new belt (one that has been run for less than five minutes), the tension should be 540-735 N (55-75 kg, 121-165 Ib) when first measured.
•   Follow the manufacturer's instructions for the belt tension gauge.
•   If there are cracks or any damage evident in the belt, replace it with a new one.

If adjustment is necessary:
1. Loosen the alternator adjusting bolt and the through bolt nut.
2. Move the alternator to obtain the proper belt tension, then retighten the adjusting bolt and the through bolt nut to the specified torques. 3. Recheck the deflection of the belt.
If adjustment is necessary:
1. Loosen the alternator adjusting bolt and the through bolt nut.
2. Move the alternator to obtain the proper belt tension, then retighten the adjusting bolt and the through bolt nut to the specified torques. 3. Recheck the tension of the belt.