See Figure 1
On the 1973-79 models, adjust the drive belt(s) after the first 3,000 miles, afterwards, inspect the belt(s) every 12,000 miles/12 months for evidence of wear such as cracking, fraying and/or incorrect tension; on the 1980-83 models, inspect the drive belt(s) every 30,000 miles/24 months. Determine the belt tension at a point halfway between the pulleys by pressing on the belt with moderate thumb pressure. The belt should deflect about 1 / 4 es over a 7-10inch span or 1 / 2 es over a 13-16inch span, at this point. If the deflection is found to be too much or too little, perform the tension adjustments.
CHECKING AND ADJUSTING TENSION
See Figures 2, 3, 4 and 5
Before adjusting, inspect the belt to see that it is not cracked or worn. Be sure that its surfaces are free of grease and oil.
- Push down on the belt halfway between pulleys with moderate force. The belt should deflect approximately 1 / 2 es. Deflection should be slightly less with a new belt as tension is lost rapidly for the first 1 / 2 hour or so of operation.
- If the belt tension requires adjustment, loosen the adjusting link bolt and move the alternator with a pry bar positioned against the front of the alternator housing. On 1983 models, loosen the top mounting bolt and then turn the adjusting nut outboard of the alternator. This will reposition the alternator without prying.
- When the belt tension is correct tighten the upper mounting bolt to about 16 ft. lbs. Recheck the tension, correcting the adjustment if necessary.
Do not apply pressure to any other part of the alternator.
REMOVAL & INSTALLATION
- Loosen the component-to-mounting bracket bolts.
- Rotate the component to relieve the tension on the drive belt.
- Slip the drive belt from the component pulley and remove it from the engine.
If the engine uses more than one belt, it may be necessary to remove other belts that are in front of the one being removed.
- To install, reverse the removal procedures. Adjust the component drive belt tension to specifications.