Section V. GENERATOR REGULATOR

Figure 7-4-Continued.

Section V. GENERATOR REGULATOR

and the regulator connector. Connect another jumper

7-12. General

between pin "B" of the regulator connector and ground.

The three-unit, battery-charging generator regulator (fig.

Start the engine and slowly increase the speed. No

3-20) automatically controls the output of the generator to

increase in the charging rates indicates the generator is at

keep the batteries fully charged. The circuit-breaker unit

fault. An increase indicates that the regulator is at fault

closes the circuit between the batteries and the generator

and must be adjusted or replaced.

when the generator voltage is higher than the battery

Caution

voltage, and opens the circuit when the battery voltage

equals that of the generator. The current-regulator unit

Never remove the cover from the

limits the current to the maximum rated value of the

voltage regulator while the engine is

generator. The voltage regulator limits the voltage to the

operating

the

battery

maximum rated value of the system at full charge.

connected.

7-13. Removal and Installation

7-15. Cleaning

Remove and install the Generator Regulator as directed

Do not disassemble the regulator under any

in paragraph 3-47.

circumstances. Remove cover and wipe assemblies,

insulation, capacitors, and resistors with a clean rag,

7-14. On-Engine Testing

slightly dampened in gasoline, paint thinner, or

Defects in the battery-charging generator system are

drycleaning solvent.

indicated by a high charging rate when the batteries are

7-16. Testing

fully charged. Perform the on-engine testing as follows:

a. With test probes, touch "Arm" Terminal and

a. When a high-charging rate with fully charged

circuit breaker stationary contact. (Touch end of series

batteries is indicated, disconnect the lead assembly

winding and circuit breaker stationary contact on

connector from the regulator (fig. 320) and connect a

regulators which do not have the terminals directly on the

jumper between pin "A" of the lead assembly connector

sub-base.) If lamp does not light, it indicates an open

and pin "A" of the voltage regulator connector. Operate

circuit in one of the series coils or connections. Inspect to

the unit at half throttle. If the output remains high, the

find cause of open and repair or replace parts affected.

fault is in the generator or wiring. If the output drops off,

the trouble is in the regulator and it must be adjusted or

b. Touch test probes to "Arm" and "Bat" terminals.

replaced.

(Touch end of series winding end circuit breaker yoke on

regulators which do not have the terminals directly on the

b. When a low, or no-charging rate with partially or

subbase.) If lamp lights, install new circuit breaker

fully discharged batteries is indicated, inspect for loose

contacts or complete circuit breaker. unit.

connections or damaged wiring. If no faults are found,

disconnect the connector as in (1) above. Connect two

c. Touch test probes to "Field" and "Arm"

jumpers between the pins of the lead assembly connector

7-7