GMC 4000 Series Service Manual page 438

5. Connect a test voltmeter between regulator
No. 3 terminal and ground.
6. Adjust center position of potentiometer to
obtain a voltage setting of 14.4 volts at regulator.
Voltage will require readjustment every five min­
utes until voltage becomes stable. Normally 15 to
20 minutes will be required for this process.
NOTE: This voltage is based on the assump­
tion that regulator is being set on a test bench at
normal room temperature. If regulator is being set
G M C S E R V I C E M A N U A L
on the vehicle, voltage should be set 0.1 volt lower
than the middle range given in "Specifications" to
compensate for the higher ambient temperature.
inal assembly from regulator case. Insert lever
into potentiometer so that it will mate with middle
position of adjustment slots in regulator case. Use
a soldering iron to melt adjustment lever into
potentiometer.
case and attach cover plate.
A/C GENERATING SYSTEM
7. Remove the panel board, heat sink and term ­
8. Assem ble regulator components into the
Sec. 6Y
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