3-60. GENERAL METHODS USED
OF ELECTROMAGNETIC IN-
suppression is obtained by providing a path
For replacement of electromagnetic inter-
to ground for
stray currents. The methods used include
ference suppression components in the fuel transfer
and using capacitors, inductors and resistors.
pumps as a unit.
3-61. INTERFERENCE SUPPRESSION COMPONENTS.
Replacement of the interference components
at main load terminal and static exciter shall be referred
Fuel transfer pumps. The fuel transfer pumps
to higher maintenance level.
an integral part.
OF INTERFERENCE SUPPRESSION
b . Effective with precise units, serial number
If electromagnetic interference is suspected, refer
RZ70001 and KZ00001 thru KZ07252, additional sup-
pression components have been included at the main
to higher maintenance level for testing.
load terminal and as part of the static exciter.
Section VIII. ORGANIZATIONAL MAINTENANCE OF THE ENGINE ELECTRICAL SYSTEM
perature switch provides automatic shutdown in the
event that coolant temperature exceeds 220 3 F.
This section contains organizational maintenance in-
The engine lube oil pressure is read through a pressure
structions for the engine electrical system. Electrical
transmitter. A low oil pressure switch provides automa-
power for starting the generator set engine is supplied by
tic shutdown in the event that oil pressure falls below
two 12 volt, 100 amp-hour, lead-acid type batteries con-
20 2 psig. The day tank is equipped with a double
nected in series. A slave receptacle facilitates external
float switch which controls the fuel solenoid valve and
connection to the batteries. The starting motor is a 24
provides automatic shutdown when only enough fuel
volt, heavy duty unit equipped with a positive indexing
remains for one minute of operation. The components
drive and an overrun type clutch. An integral solenoid
of the engine electrical system are connected electri-
switch is connected to the clutch shift lever by linkage
cally through the engine wiring harness.
and engages the clutch pinion gear with the flywheel and
holds it in mesh during engine cranking. A 28-volt, con-
tinous duty, alternator with integral voltage regulator and
diode rectifier supplies electrical power for recharging the
batteries after cranking. A manually reset speed switch
driven by the camshaft provides sequence control of cir-
(1) Refer to paragraph 3-8 and service the bat-
cuits during starting and also provides automatic shutdown
in the event of engine overspeeding. Coolant temperature