Deflection Method

Deflection Method

86M 2073

• A Through bolt
• B Measure here
• C Crankshaft pulley
• D Adjustment locknut
• E Adjusting bolt

1. Apply a force of 100N and measure the deflection between the alternator and the crankshaft pulley.

Deflection: 10 – 12 mm

Note:

• On a brand – new belt (one that has been run for less than five minutes), the deflection should be 8.5 – 11 mm when first measured.
• If there are cracks or any damage evident on the belt, replace it with a new one.

2. Loosen the through bolt and adjustment locknut.
3. Turn the adjusting bolt to obtain the proper belt tension, then retighten the nut and through bolt.
4. Recheck the belt deflection.

Belt Tension Gauge Method

86M 2074

• A Belt tension gauge
• B Crankshaft pulley
• C Adjustment locknut
• D Adjusting bolt
• E Through bolt

1. Attach the belt tension gauge to the belt and measure the tension of the belt.

Tension: 300 – 450N

• On a brand – new belt (one that has been run for less than five minutes), the deflection should be 450 – 650N when first measured.
• Follow the manufacturer’s instructions for the belt tension gauge.
• If there are cracks or any damage evident on the belt, replace it with a new one.

2. Loosen the through bolt and adjustment locknut.
3. Turn the adjusting bolt to obtain the proper belt tension, then retighten the nut and through bolt.
4. Recheck the tension of the belt.