TM 9-2320-387-24-2
Change 1
18-10.5
18-3.1. 400-AMPERE DUAL VOLTAGE ALTERNATOR TESTING AND REPAIR (Cont'd)
Table 18-5. No-Load Test.
AMPS
28VDC
14VDC
DIAGNOSIS
322-400
21-25
10.5-12.5
Test bench battery is discharged (or defective).
Allow to charge (or replace).
322-400
26-30
13-15
Give time to stabilize while monitoring VOLTS.
If VOLTS rise above normal range (26-30 volts),
regulator and/or tube assembly must be
replaced. If AMPS fall, charging system is OK.
322-400
31-35
15.5-17.5
STOP TEST. Regulator and/or tube assembly
must be replaced. Refer to static testing, task c.
160-238
21-25
10.5-12.5
Alternator and/or regulator must be repaired or
replaced. Refer to table 18-8.
160-238
26-30
13-15
Regulator OK. Refer to table 18-6.
160-238
31-35
15.5-17.5
STOP TEST. Bench malfunction or wiring
error.
