Component Part Replacement; Generator Pulley Replacement; Single Groove Pulley; Double Groove Pulley - Chevrolet 10 1971 Series Chassis Service Manual

This gives us a variable resistance in
NOTE:
series from a hot lead to the relay coil.
2. Turn resistor to " open" position.
3. Turn ignition switch off.
4. Slowly decrease resistance and note closing voltage
of the relay. Adjust by bending heel iron in the man­
ner illustrated in Figure 10c.
Other Harness Checks
Other wires in the charging system harness need be
checked for continuity by use of an ohmmeter or a test
light (12 Volt). Connect the test lamp so the wire in
question is in series in the test circuit.

GENERATOR PULLEY REPLACEMENT

Single Groove Pulley

1. Place 15/16" box wrench on retaining nut and insert
5/16" alien wrench into shaft to hold shaft while
removing nut (fig. 11c).
2. Remove washer and slide pulley fan and spacer from
shaft.
3. Reverse Steps 1 and 2 to install, use a torque wrench
with a craw-foot adapter (instead of box wrench)
and torque the nut to 50 ft. lbs. (fig. 12c).

Double Groove Pulley

1. Place a 15/16" socket (with wrench flats on the drive
end or use Adapter J-21501 and a box wrench) on
retaining nut, insert a 5/16" alien wrench through
Fig. l i e — Pulley Removal

COMPONENT PART REPLACEMENT

Fig. 10c-Adjusting Field Relay Closing Voltage
socket and adapter into hex on shaft to hold the shaft
while removing the nut.
2. Remove washer and slide pulley fan and spacer from
shaft.
3. To install, slide fan, spacer, pulley and washer on
shaft and start the nut.
4. Use the socket and adapter with a torque wrench and
tighten nut to 50 ft. lbs. torque.
15/16
SOCKET
ADAPTER
5 /1 6 ALLEN
Fia. 12c-Torquing Pulley N u t
ENGINE-ELECTRICAL 6Y-13
10-30 CHEVROLET TRUCK SERVICE MANUAL