TM 5-3825-230-14&P 4-57. ALTERNATOR AND MOUNTING BRACKET REPLACEMENT/REPAIR (CONT). e. Testing. NOTE If   testing   is   to   be   accomplished, alternator   follow-on   tasks   must   be performed first. (1) Turn   all   lights   and   accessories   on,   then   pull shutoff    handle    while    cranking    engine    10-15 seconds (para 2-8).  This discharges the battery. (2) Release  fuel  shutoff  handle  and  turn  off  lights and accessories. (3) Open    right    side    access    cover    and    attach voltmeter and ammeter as shown. CAUTION If    voltmeter    reading    exceeds    30.3 volts, shut engine down immediately or  damage  to  equipment  may  result. Refer to table 4-6. (4) Start engine (para 2-8), and accelerate to 1500- 2000 RPM.  Normal voltage is 24 V, and normal amperage  is  28.2  to  28.8  amps.  Take  readings and refer to table 4-6. (5) Remove voltmeter and ammeter and close right side engine access cover. NOTE Follow-on maintenance: • Connect battery cables (para 4-73) • Install alternator belt (para 4-56) END OF TASK Table 4-6.  Alternator Testing. Amps Volts Diagnosis High Low Charging  system  OK.    Battery  not yet fully charged.  Wait for charging system    to    bring    battery    to    full charge:  amps  should  fall  and  volts should stabilize within Normal Range. High Normal Watch    until    amps    fall    or    volts exceed Normal Range.  If amps fall and  volts  remain  normal,  charging system  OK  If  volts  exceed  normal, regulator should be replaced. High High Regulator should be replaced. Low Low Make    sure    voltmeter    leads    are attached to alternator, not battery. If no affect observed, replace alternator. Low Normal Charging system OK Low High If    battery    checks    OK,    regulator should be replaced. 4-86