TM 9-4520-272-14&P
0039 00
ADJUST
WARNING
Disconnect the negative battery terminal on the battery closest the engine
bay access door before performing maintenance involving the alternator.
Note that power is still applied to the alternator even when the main battery
shutdown switch is in the OFF position. Failure to disconnect battery terminal
may result in shock or other serious injury.
NOTE
Use of the pry bar in the general mechanics tool kit is recommended for the adjustment of
the alternator belt.
1. To retension the alternator belt (1), loosen the two bolts (2) that maintain tension on the
alternator belt. Do not remove bolts.
2. Place a pry bar between the alternator (3) and the engine mounting bracket (4) and apply
pressure to the alternator so as to tension the belt (1). When there is no more than 1/4 inch of
up and down deflection in the belt, tighten the two tensioning bolts (2).
REPLACE BELT
1. Loosen alternator and remove tension from belt as described in the section of this work
package entitled ADJUST.
2. Remove the rubber center portion of the flexible coupler as described in WP 0040 00.
3. Remove defective alternator belt.
4. Install new alternator belt, engaging the belt on the alternator and the fan drive pulley.
5. Install rubber center portion of the flexible coupler as described in WP 0040 00. Be sure to
allow a 1/8 inch gap between the right side of the rubber center portion of the flexible coupler
and the left rim of the right flexible coupler flange.
6. Tension new alternator belt as described in the section of this work package entitled
ADJUST.
REPLACE ALTERNATOR
WARNING
Disconnect the negative battery terminal on the battery closest the engine
bay access door before performing maintenance involving the alternator.
Note that power is still applied to the alternator even when the main battery
shutdown switch is in the OFF position. Failure to disconnect battery terminal
may result in shock or other serious injury.
1. Tag the wires on the rear of the alternator (3) as to their location and function.
0039 00-3
