ARMY TM 9-6115-464-12
AIR FORCE TO 35C2-3-445-1
NAVY NAVFAC P-8-624-12
Section 1. OPERATING PROCEDURES
GENERAL. This section describes and illustrates the various controls and instruments and provides the
operator with sufficient information to insure proper operation of the generator set.
CONTROLS AND INSTRUMENTS.
General. The generator set controls and instruments are illustrated in Figure 2-1.
Panel Illumination Light (1, Figure 2-1). The panel illumination lights are 30 volt, 0.6 amp, candelabra
bayonet base incandescent lamps with a clear finish. Each lamp is fitted with a hood which is slotted on
the bottom to direct light onto the control panel. The panel illumination lights are controlled by the PANEL
Air Cleaner Condition Indicator (2, Figure 2-1). The air cleaner condition indicator is a press-to-test lamp
with a red lens. It illuminates to indicate that the engine air cleaner is clogged.
Frequency Meter (3, Figure 2-1). The frequency meter is a dial indicator type gauge. For the 50/60 Hz tactical
precise and tactical utility, the meter is calibrated from 48 to 62 Hertz in 0.1 Hertz increments with the region
between 53 and 57 Hertz unmarked. For the 400 Hz tactical precise model, the meter is calibrated in 0.5 Hertz
increments from 388 to 412. The frequency meter indicates the frequency of the generator set output. Normal
indication is 400 Hz for Mode II generator sets. For Mode I generator sets, normal indication is determined
by the manual speed control adjustment (50 or 60 Hz).
Kilowatt Meter (4, Figure 2-1). The kilowatt meter is a dial indicator type gauge calibrated in percent of rated
output from 0 to 133. It indicates the generator set power output. Normal indication depends on applied load.
Volts-Amps Transfer Switch (5, Figure 2-1). The VOLTS-AMPS transfer switch is a rotary type switch.
It selects current in each phase, three line-to-line voltages, and three line-to-neutral voltages which are
indicated on the ammeter and voltmeter.
AC Ammeter (6, Figure 2-1). The ac ammeter is a dial indicator type gauge. For the 50/60 Hz tactical
precise and tactical utility models, it is calibrated in percentage or rated current from 0 to 133 for 60 Hz
operation and from 0 to 160 for 50 Hz operation. For the 400 Hz tactical precise model, it is calibrated
in percentage of rated current from 0 to 133. Normal indication depends upon applied load.
AC Voltmeter (7, Figure 2-1). The ac voltmeter is a dial indicator type gauge calibrated in 5 volt incre-
ments from 0 to 500. It indicates the voltage output of the generator set. Normal indication is 120, 208,
240 or 416, depending upon the position of the reconnection board and the volts-amps transfer switch.
Low Oil Pressure Indicator (8, Figure 2-1). The low oil pressure indicator is an indicator lamp with a red lens.
It illuminates when the oil pressure drops below 20±2 psi and the low oil pressure protective device actuates.
Coolant High Temperature Indicator (9, Figure 2-1). The coolant high temperature indicator is an indica-
tor lamp with a red lens. It illuminates when the coolant temperature rises above 217±3°F and the high
coolant temperature protective device actuates.
Overspeed Indicator (10, Figure 2-1). The overspeed indicator is an indicator lamp which has a red lens. It
illuminates when the engine speed reaches 2400 to 2450 rpm and the overspeed protective device actuates.
No Fuel Indicator (11, Figure 2-1). The no fuel indicator is an indicator lamp with a red lens. It illuminates
when the day tank contains only enough fuel for one minute of operation and the low fuel protective device
Short Circuit Indicator (12, Figure 2-1). The short circuit indicator is an indicator lamp with a red lens. It
illuminates with the actuation of the short circuits protective device.