When installing or adjusting the drive belt, be sure the bolt at the pivot point is
properly tightened, as well as the bolt in the adjusting slot.
mounted regulator and field relay, disconnect all other leads from the alternator and tag each one to ensure
Loosen the mounting bolts and the adjusting strap bolt. Then remove the drive belts.
While supporting the alternator, remove the adjusting-strap bolt and washers. Then remove the
mounting bolts, washers, and nuts. Remove the alternator carefully and protect it from costly physical damage.
Remove the pulley assembly if the generator or alternator is to be replaced.
Repairs and overhaul work on alternators should be referred to an authorized repair station of the manufacturer
of this equipment. Replacement parts for alternators should be ordered through the equipment manufacturer's
outlets. For alternators manufactured by Delco-Remy Division, repair service and parts are available through
AC Delco branches and repair stations.
Install the drive pulley, if it was
removed. Tighten the pulley retaining nut to 50-
60 lb ft (68-81 Nm) torque (Fig. 2).
If the pulley was not removed, check the
retaining nut for proper torque.
Figure 2. Tighten Alternator Pulley
Position the alternator on the mounting brackets and start the bolts, with washers in place, through
the boltholes in the end frames. If nuts are used, insert the bolts through the boltholes in the mounting bracket
and end frame. Make sure that the washers and nuts are in their proper locations.
Align the threaded hole in the adjusting lug of the drive end frame with the slot in the adjusting
strap. Start the bolt, with the washers, through the slot of the adjusting strap and into the threaded hole in the
Place the drive belts in the grooves of the pulleys.
Adjust the belt tension as outlined in Preventive Maintenance. Tighten all of the bolts after the belt
tightening is completed.
Attach the wires and cables. Be sure that each one is correctly installed in accordance with its
previous location on the generator or alternator. Keep all connections clean and tight.