Note

This regulator is a sealed unit and no servicing or adjusting is necessary or recommended. When some difficulty arises, checks can be made to determine if the regulator is controlling generator output within specifications. If voltage readings are not within specifications, regulator should be replaced.

A. TESTING GENERATING SYSTEM (FIG. 51-7)

1. Disconnect wire or wires from regulator battery terminal "B+". On XLH models, connect these wires together.

2. Connect one lead from 1-1/2 ohm resistor (not less than 100 watt rating) to the regulator "B+" terminal. Connect the other lead from the resistor to the Positive terminal of an ammeter (0-15 amp). Connect the negative ammeter lead to ground on motorcycle.

3. Connect the Positive lead of a voltmeter (0-15 volts) to regulator "D+" terminal, connect the negative lead to ground on chassis.

4. Disconnect wire from regulator field "DF" terminal and connect this wire to one lead of a field control variable resistor, connect other lead of the field control to ground on motorcycle chassis. Turn field control to "Open" position.

5. Operate engine at 2700 RPM - (approximately 45 MPH).

6. Slowly rotate field control resistor knob toward the "Direct" position until ammeter reads 10 amperes, then immediately turn the control knob to "Open" position. If a reading of 10 amperes is obtained, generator is O.K. and any difficulty in the

charging circuit is caused by a faulty regulator or defective wiring. Inspect wiring and make regulator tests B and C. If a reading of 10 amperes cannot be obtained and voltmeter reading is below 12 volts, generator is in need of service.

If no reading is obtained on ammeter but voltmeter reading is 15 volts or higher, cutout relay is defective and regulator should be replaced.

B. TESTING CUTOUT RELAY UNIT CLOSING VOLTAGE - SAME CONNECTIONS ARE USED AS IN TEST A (FIG. 51-7)

1. Turn field control resistor knob to "Open" position.

2. Operate engine at 2000 RPM (approximately 35 MPH).

3. Slowly turn field control toward "Direct" position. As the resistance is decreased, the voltmeter reading will increase. Note the highest reading on the voltmeter before the pointer "kicks". This will be the relay closing voltage. Repeat operation a few times, each time returning the field control resistor to "Open" position. If the closing voltage is not within specifications, (see Fig. 51-1) replace regulator.

C. TESTING VOLTAGE CONTROL UNIT SETTING. (FIG. 51-8)

Two tests are required:

2. Testing regulator voltage setting under no load. Testing Voltage Setting Under Load

1. Make same connections as used to make previous Test B, except move positive voltmeter lead to regulator "B+" terminal. See Fig. 51-8.

2. Turn field control resistor to "Direct" position (no resistance in field circuit).

3. Operate engine at 2700 RPM (approximately 45 MPH) and note reading on voltmeter. This reading will be the voltage under load.

Testing Voltage Setting Under No Load

1. Remove 1-1/2 ohm resistor used in previous load test from circuit by disconnecting grounded ammeter lead. Place field control resistor in Direct position (no resistance).

2. With engine running at 2700 RPM, note voltmeter reading. This reading will be the voltage at no load.

Readings taken in Load and No Load tests must be within specifications or regulator should be replaced. See Fig. 51-1 for specifications.

method ii testing delco - remy regulators (vat 26 tester)

GENERATOR-BATTERY SYSTEM (6 OR 12 VOLT) Covers all models except Sporster XLCH

A. TESTER CONTROLS

Turn ground polarity selector to negative; Load Control knob to Direct; Ammeter selector to 100A position; and voltage selector to 16V position for 12 volt system, or 8V position for 6 volt system.

B. TESTER CONNECTIONS (See Fig. 51-9)

1. Remove "BAT" lead from voltage regulator.

2. Connect Regulator lead "R" of tester to "BAT" terminal of regulator.

3. Connect Battery lead "B" of tester to battery wire removed from regulator.

4. Connect Ground lead "G" of tester to ground of motorcycle.

5. Connect Positive voltmeter lead to "GEN" terminal of regulator.

6. Connect Negative voltmeter lead to ground of motorcycle.

7. Remove wire connected to regulator field "F" terminal and connect this wire to a lead of the field control variable resistor, the other lead of the field control resistor is connected to ground on motorcycle. Turn field control to "Open" position.

Figure 51-8.
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