Figure 34. Electrical charging circuit.

TM 10-3930-222-20

Section VllI. ELECTRICAL SYSTEM (GROUP 06)

40. General

(3) Remove the jamnuts (10) and nuts (11) from the

bolts (12) that secure the generator to the

The electrical system consists of six basic

mounting bracket (13) and remove the

circuits: starting, charging, ignition, horn, instrument,

generator from +.he bracket.

and lighting. The units of the various circuits are

connected in a 12-volt, negative ground, single-wire

(4) If necessary, remove the nuts and lockwashers

system. When repairing or replacing wiring, refer to

that secure the bracket to the engine and

wiring diagrams (fig. 34-9).

remove the bracket from the engine.

(5) Unscrew and remove the nut (1) and lockwasher

41. Generator

(2) that secure the pulley (3) to the generator

and press the pulley from the generator.

a. Generator Voltage Output Test.

Test the

(6) Remove the fan (4) from the generator.

generator for voltage output by following the procedure

(7) Remove the key (14) from the shaft.

outlined in figure 40.

c. Installation. Reverse procedures in a above and

b. Removal. Refer to figures 41 and 42 and

polarize the generator if it has lost its residual

remove the generator as follows:

magnetism. This condition is indicated by an absence

(1) Remove the bolt (8, fig. 42), lockwasher (7),

of charging. This loss of residual magnetism occurs

and washer (6) that secure the generator (9) to

frequently in generators that have been in storage. To

the adjusting plate (5). Move the generator

restore magnetism to the generator, take a hot battery

toward the engine, and remove the fan and

wire and momentarily touch the field terminal on the

generator belt from the generator.

generator. This is known as "flashing" the generator,

(2) Disconnect and tag the armature and field wires

at the generator terminals.

Figure 34. Electrical charging circuit.