INTERMEDIATE (FIELD), (DIRECT SUPPORT AND GENERAL SUPPORT) AND
DEPOT MAINTENANCE INSTRUCTIONS
REPAIR PARTS, SPECIAL TOOLS AND EQUIPMENT
5-1. Tools and Equipment
General Support) and Depot Maintenance Repair
Parts and Special Tools
No special tools or equipment are required at in-
termediate (field), (direct support and general support)
Maintenance repair parts list for intermediate
and depot maintenance levels.
(field), (direct support and general support) and depot
Maintenance of the generator and engine are contain-
5-2. Intermediate (Field), (Direct Support and
This section contains troubleshooting or malfunc-
TEST OR INSPECTION
tion information and test for locating and correcting
most of the troubles which may develop in the
generator sets. Each malfunction or trouble symptom
1. GENERATOR FAILS TO BUILD UP RATED
for an individual component, unit, or system is follow-
ed by a list of tests or inspections necessary for you
Step 1. Inspect the voltage regulator for loose
to determine probable causes and suggested correc-
wires, corroded wiring, metal to metal con-
tive actions for you to remedy the malfunction.
tact, incorrect wiring, or other damage.
Test voltage regulator for proper voltage
requirements as follows:
a. This manual cannot list all possible malfunc-
a. Voltage Regulator Testing (AC
tions that may occur or all tests or inspections, and
corrective actions. If a malfunction is not listed (ex-
(1) Place output selector switch on
cept when malfunction and cause are obvious), or is
desired test setting and disconnect load
not corrected by listed corrective actions, you should
notify higher level maintenance.
(2) Start generator set. Place circuit
breaker in ON position and check output
b. Table 5-1 lists the common malfunctions
selector switch to indicate load terminals
you may find during the operation or maintenance of
where output voltage is applied.
the generator sets or their components. You should
(3) Check set voltmeter for correct
perform the tests/inspections and corrective actions
in the order listed.
terminals to verify reading on set
Before you use this table, be sure you have
variable resistor will not correct the defi-
performed all normal operational checks. If
ciency, check exciter voltage across ter-
you have a malfunction which is not listed
minals 20 and 21 on the voltage regulator
in this table, notify the next higher level of
terminal board. This voltage will vary but
should be about 30 volts. If voltage at ter-
minals 20 and 21 of the voltage regulator
Air Force users may perform maintenance
terminal board fails to meet specifications,
within the scope of their capability.
the voltage regulator is defective and
should be fully tested and repaired (see
of the generator set on all position settings
of the voltage selector switch.