P-9-TM-457-35 T.O. 35C2-3-442-2
T M - 0 7 4 6 4 A - 3 5 TM 5-6115-457-34
c. Close pressure shutoff valve and
b. Disconnect electrical connector from
day tank fuel solenoid valve.
slowly bleed pressure from system until the
generator set shuts down and LOW OIL
c. Operate the generator set at rated
PRESSURE fault locator indicator illumi-
voltage, frequency and at full load until
nates. Record pressure. The generator
day tank float valve switch actuates, causing
set shutdown and LOW OIL PRESSURE
the load contactor to open, the engine to
fault locator indicator shall occur simul-
shut down and the NO FUEL fault indicator
taneously at 15 3 PSI.
to illuminate.
d. Remove test components from gen-
d. Start generator set and as soon as
erator set.
engine starts, lift red battle short switch
10-7. HIGH COOLANT TEMPERATURE
guard and position switch to ON. Operate
TRIP TEST.
generator set for one minute at rated volt-
age, frequency and fuel load. Generator
Perform the high coolant tempera-
set should operate for one minute without
ture trip test as follows:
running out of fuel. Shut down generator
a. Remove coolant temperature trans-
set, but do not de-energize DC circuit
mitter from front of engine thermostat
breaker.
housing and install thermocouple in its
e. Connect electrical connector to day
place.
tank fuel solenoid valve. Position start-run-
CAUTION
stop to RUN and fill day tank. Position
battle short switch and guard to OFF posi-
If the engine fails to shut down when
tion and de-energize DC circuit breaker.
222 F is reached, drop the load and
unblock the radiator to cool engine.
10-9. SHORT CIRCUIT TRIP TEST.
b. Operate unit at rated speed, block
air passing through the radiator and apply
sufficient load to raise the unit temperature
Perform the short circuit trip test
to the trip point of 217 3F. The high
as follows:
coolant temperature switch shall actuate at
214 to 220 F, causing the load contactor to
open, the engine to shut down, and the
a. Connect a load bank capable of sup-
COOLANT HIGH TEM P fault indicator to
plying 450 percent of rated current to the
illuminate.
generator set load terminals. Reactive
load may be used to obtain the required
c . Remove the rmocouple and replace
current.
coolant temperature transmitter.
10-8.
LOW FUEL LEVEL TRIP TEST.
b. Adjust short circuit load to draw
Perform the low level trip test as
350 percent of rated current.
follows :
a. Energize DC circuit breaker and
c. Operate the generator set at rated
position start-run-stop switch to RUN to
voltage, rated speed, and rated load.
fill day tank. When day tank is full, the
electric fuel transfer pumps will change
d. Apply short circuit load of 350 percent
pitch indicating they are bypassing fuel
rated current (total of 450 percent of rated
internally.
current) to the generator set in one step.
10-3
