TM 9-4940-421-14
Table 3-2. Operator/Crew Preventive Maintenance Checks and Services (cont)
LOCATION
NOT FULLY MISSION
ITEM TO
ITEM
PROCEDURE
CAPABLE IF:
INTERVAL
CHECK/SERVICE
NO.
OVERALL SYSTEM CHECKOUT
(CONT)
Ammeter reads in nega-
BATTERY AMMETER (14). Check
Control Panel
19
During oper-
tive zone during engine
for normal indication in 0 to +30
ation but not
operation.
zone. Negative readings are abnor-
less frequent-
ly than week-
mal. If normal indication cannot be
ly
obtained stop engine and notify orga-
nizational maintenance.
Oil pressure is in red
OIL PRESSURE GAGE (15). Check
zone.
for normal indication in green zone;
red zone indicates abnormal. If oil
pressure is low, stop engine and add
oil as required (p. 3-l). If normal in-
dication cannot be obtained, notify
organizational maintenance.
Meter fails to read
FREQUENCY METER (16). Check
58-62 Hz both with and
for normal indication of 58-62 Hz.
without load, and/or this
Adjust throttle as necessary to bring
frequency range cannot
frequency within proper range. Turn
be set and held using
on air compressor or otherwise con-
nect 10 amp or greater load to genera- the throttle.
tor. Readjust throttle as necessary to
restore frequency within proper
range. If generator cannot be main-
tained at correct frequency range,
notify organizational maintenance.
Turn off air compressor or remove
electrical load.
Running time meter is
RUNNING TIME METER (17).
not working.
Check to see if running time meter is
turning over while engine is running.
Notify organizational maintenance if
running time meter is not working.
3-2.6
Change 1
