Battery

Figure 51-10.

12 Volt Double Contact Regulator - Operate engine at 2000 RPM (approximately 40 MPH). Turn field control resistor knob to "Open" position then to "Direct" position to cycle regulator. Check voltmeter reading. Reading indicated on voltmeter is the voltage regulator setting of the upper contacts (shorting contacts). Voltmeter reading should be within manufacturer's specifications (See Fig. 51-1). Maintain engine speed, slowly rotate field control resistor toward "Open" position to increase resistance until voltmeter reading drops slightly and then remains steady. This indicates the voltage setting of the lower contacts (series contacts). The voltage difference between the settings of the two sets of contacts should be within specifications (See Fig. 51-1).

If voltage readings are not within specifications, replace regulator or service and adjust settings (See "Servicing Regulator").

Never ground the 12 volt generator or regulator field terminal while these two units are connected and operating. This will burn up the upper set (shorting set) of contacts of the voltage control unit.

E. TESTING VOLTAGE CONTROL UNIT SETTING (FIG. 51-10)

Same connections are used as in previous Test D except move Positive voltmeter lead to regulator battery "BAT" terminal and remove grounded lead of the field control variable resistor and connect to regulator field "F" terminal. (See Fig. 51-10)

1. Turn field control knob to "Direct" position.

2. Turn load control to the 1/4 ohm position.

6 Volt Regulator - Operate engine at 2000 RPM (an-proximately 40 MPH). Turn field control resistor knob to "Open" position then to "Direct" position to cycle regulator. Check voltmeter reading. Reading indicated on voltmeter is voltage regulator setting.

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