Voltage Setting

ELECTRICAL

Figure 21.

Figure 22.

NOTE: Only an approximate voltage

regulator air gap setting should be

made by the "feeler gauge" method.

The final air gap setting must be

whatever is required to obtain the

specified difference in voltage

between the upper and lower sets of

contacts.

3. Voltage Setting: The voltage at which the

regulator operates varies with changes in regulator

ambient temperatures. The ambient temperature is the

temperature of the air measured 1/4 of an inch from the

regulator cover.

To check and adjust the voltage setting, proceed as

follows:

a. Connect an ammeter and a 1/4 ohm resistor with

a rating of 25 watts or more in series in the circuit at

the "BAT" terminal on the alternator. (Fig. 22)

b. Make connections to the adapter as shown in

Figure 23. Use a 25 ohm 25 watt variable resistor in

series with the alternator field winding at the regulator

"F" terminal, and connect a jumper lead from the

adapter to the alternator "BAT" terminal as shown.

Figure 23.

Also, connect a voltmeter from the adapter to ground, as

shown. Turn the variable resistor to the closed or "no

resistance" position.

B-68