TM 55-1930-209-14&P-9-1
5-9.1
This generator, like the two SSG’s, is normally started and operated from a control panel on the switchboard in
the ROWPU space.
5-9.2
Like the two SSG’s, this generator can operate in parallel with either of the two SSG’s for load transfer.
SECTION III. Operating Instructions
5-10 . Operating controls and Indicators
5-10.1
4.236M diesel engine
5-10.1.1 Engine instruments. These are on a small instrument panel on top of the engine block
a.
Engine oil pressure gauge. Located on upper left portion of this small panel, gauge indicates oil pressure on its
upper scale. Normal oil pressure is 30/60 psi when engine is new at normal operating temperature and engine is at
maximum speed. During the life of the engine, as bearing surfaces wear, pressure will gradually decrease. When oil is hot
or wrong grade of oil is used for certain dimatic conditions, oil pressure may decrease slightly.
b.
Engine cool and temperature gauge. Located on upper right portion of panel, this gauge indicates temperature of
engine block coolant in degrees Fahrenheit on upper scale. A thermostat in the dosed circuit portion of the cooling system
keeps this temperature between 168 and 197"F
c.
Coolant pressure gauge. Located on lower left side of panel, this gauge reads from 0 to 15 psi. Low pressure is
an indication of possibly blocked water passage.
d.
Hour meter. Located on lower right portion of panel, this meter indicates number of hours generator set has
operated and provides the basis for scheduling maintenance and services.
5-10.1.2 Engine Indicators
a.
Fuel pressure gauge. On top of fuel oil filtering system, this gauge indicates fuel pressure in psi and
indicates when fuel oil filters should be changed.
b.
Oil dipstick. Located on left side of engine block (looking at engine from generator). This dipstick
shows amount of oil in crankcase. Oil level must be between maximum and minimum marks on dipstick.
Never fill above maximum level.
c.
Coolant filler cap. Located at top front (accessory end) of engine on top of coolant tank. When
removed, cap shows level of coolant in closed coolant portion of engine cooling system.
5-10.1.3 Engine controls
a.
ENGINE CONTROL SWITCH. This switch, on SAG switchboard control panel, has START, REMOTE, and
OFF/RESET positions. To start engine from switchboard, place switch in START. To stop engine from switchboard, place
switch in OFF/RESET. To operate engine from engine, place switch in REMOTE and use ENGINE START/STOP switch
on engine.
b.
VOLTAGE REGULATOR switch. The SAG controls on the switchboard control panel do not include this switch
to control engine speed. It is found on the SSG control panels only.
c.
Throttle. Black knob on right side (as you face switchboard) of switchboard housing. Large changes in speed
are obtained by pushing in on center button and then pulling out on throttle knob to increase speed and pushing in to
decrease speed. For fine throttle adjustments, turn knob counterclockwise to increase speed and clockwise to decrease
speed. Most throttle adjustment will be done by turning throttle knob rather than by pushing or pulling.
d.
ENGINE START/STOP switch. Located on engine. Push down on this switch to stop engine regardless of
ENGINE CONTROL SWITCH setting. When ENGINE CONTROL SWITCH is in REMOTE, push up on this switch to start
engine.
5-3
