NEED INSTRUCTIONS ON REPLACING ALTERNATOR ON F150 FORD LARIET 1986.

REMOVAL & INSTALLATION

See Figures 1 and 2


Fig. Fig. 2: Side terminal alternator

1. Open the hood and disconnect the battery ground cable.
2. Remove the adjusting arm bolt.
3. Remove the alternator through-bolt. Remove the drive belt from the alternator pulley and lower the alternator.

Some engines are equipped with a ribbed, K-section belt and automatic tensioner. A special tool must be made to remove the tension from the tensioner arm. Loosen the idler pulley pivot and adjuster bolts before using the tool. See the accompanying illustration for tool details.

1. Label all of the leads to the alternator so that you can install them correctly and disconnect the leads from the alternator.
2. Remove the alternator from the vehicle.
3. To install, reverse the above procedure. Torque the pivot bolt to 58 ft. lbs.; the adjusting bolt to 25 ft. lbs.; the wire terminal nuts to 60-90 inch lbs.

BELT TENSION ADJUSTMENT

The fan belt drives the alternator and water pump. If the belt is too loose, it will slip and the alternator will not be able to produce it rated current. Also, the water pump will not operate efficiently and the engine could overheat.
Check the tension of the belt by pushing your thumb down on the longest span of the belt, midway between the pulleys. Belt deflection should be approximately 1 / 2 inch; (13mm).To adjust the belt tension, proceed as follows:

1. Loosen the alternator mounting bolt and the adjusting arm bolts.
2. Apply pressure on the alternator front housing only, moving the alternator away from the engine to tighten the belt. Do not apply pressure to the rear of the cast aluminum housing of an alternator; damage to the housing could result.
3. Tighten the alternator mounting bolt and the adjusting arm bolts when the correct tension is reached.