DISASSEMBLY - TM-10-3930-647-14-P0219

IMPORTANT: Read the introductory paragraphs on 5-50B

before proceeding with either one of these sections.

UNDERCHARGED ENERGIZER

OVERCHARGED ENERGIZER

This condition, as evidenced by slow cranking and law

1. connect a voltmeter fron alternator No. 2 term-

specific gravity readings, can be caused by one or

inal to ground. If reading is zero, No. 2 lead

more of the following conditions even though the in-

circuit is open.

dicator lamp may be operating normally. The follow-

ing procedure also applies to circuits with an am

If Energizer and No. 2 lead circuit check good, but

meter.

a" obvious overcharge condition exists as evidenced

by excessive Energizer water usage, proceed as follows:

1. Insure that the undercharged contion has not

a. Separate end frames as covered in "Disassembly"

been caused by accessories having bee" left

section under heading of "ALTERNATOR REPAIR". Check

on for extended periods.

field winding for shorts. If shorted replace rotor

2. Check the drive belt for porper tension.

and regulator.

b. Connect ohmmeter using lowest range scale

Inspect the wiring for defects. Check all connec-

from brush lead clip to end frame as shown in

tions for tightness and cleanliness, Including the

Step 1, Figure 8, then reverse lead connections.

slip connectors at the alternator and firewall, and

the cable clamps and battery posts.

c. If both readings are zero, either the brush lead

clip is grounded or regulator is defective

4. With ignition switch on connect a voltmeter from:

a. Alternator "BAT" terminal to ground

d. A grounded brush lead clip can result from

b. Alternator No. 1 terminal to ground

omission of insulating washer (Fig. 8), omission

c. Alternator No. 2 terminal to ground

of lnsulating sleeve over screw, or damaged in-

sulating sleeve. Remove screw to inspect sleeve

A zero reading indicates an open between volt-

If satisfactory, replace regulator as covered

meter connection and Energizer.

under heading of "ALTERNATOR REPAIR".

5. If previous Steps 1 through 4 check satisfactorily,

check Delcotron alternator as follows:

a. Disconnect Energizer ground cable.

b. Connect an ammeter in the circuit at the "BAT"

terminal of the alternator,

c. Reconnect Energizer ground cable.

d. Fully load electrical circuit. and connect a

carbon pile across the Energizer.

e. Operate enqine at moderate speed as required,

and adjust carbon pile as required. to obtain

maximum current output.

If ampere output is not within 10 percent of rated

If ampere output is within 10 percent of rated output

output, ground the field winding by inserting a screw-

as stamped on alternator frame, alternator is not de-

driver into the test hole (Fig. 6). CAUTION: Tab is

fective; recheck Steps 1 thru 5.

within 3/4 inch of casting surface. Do not force screw-

driver deeper than one inch into end frame.

Operate engine at moderate speed as required, and

adjust carbon pile as required to obtain maximum

current output.

If output iS not within 10 percent of rated output,

If output is within 10 percent of rated output. re-

check the field winding, diode, trio, rcctifier bridge,

place regulator as covered in ALTERNATOR REPAIR"

and stator as covered in "ALTERNATOR REPAIR" section.

section, and check field winging.

5-50C