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Page Title:
Section II. DESCRIPTION AND DATA |
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  TM 55-1730-229-34
AG 320A0-MME-000
TO 35C2-3-473-2
TM1730-34/1
Navy users shall determine
consistent with their capability in
c. (N)
their maintenance levels in accordance
accordance with policies established in
with their service directives.
AFM 66-1.
Section II. DESCRIPTION AND DATA
1-6. DESCRIPTION.
The Aviation Ground
ac/dc generator and a hydraulic pump.
a. General.
The generator and pump are mounted on
Power Unit (AGPU) MEP-360A is a gas tur-
pads on the gearcase. Fuel for operation
bine engine-driven, wheel mounted, self-
of the engine is supplied from an inte-
propelled (up to 3 mph on flat surface),
gral fuel tank or an external source.
enclosed unit. The AGPU can be towed
(20 mph maximum), and is air transpor-
Selection of fuel source is controlled
by a four-way valve, figure 1-1. Once
table.
started, the engine runs up to 100 per-
cent governed speed of 58,737 rpm, and
provides ac/dc electrical,
The AGPU
automatically maintains that speed until
hydraulic, and pneumatic power. Power is
shutdown. Engine air intake is through
available individually, or in any combi-
nation. The AGPU provides the ground
an air cleaner/duct assembly, figure 1-4,
to the engine. Engine exhaust is through
power requirements for aircraft such as
an exhaust ejector, and out the roof
the following:
through an exhaust flapper.
AH-1 (Huey Cobra)
AH-64 (Apache)
d. Generator. The generator (figure
C-12 (Huron)
CH-47 (Chinook)
ac/dc, self-excited, brushless unit. It
OH-6 (Cayuse)
includes a permanent magnet stator and
OH-58 (Kiowa)
rotor, an exciter stator and rotor, and a
OV-1 (Mohawk)
main dc rotating field and ac stator. The
U-21 (UTE)
main ac stator incorporates three sets of
UH-1 (Iroquois)
three phase windings. One set of main
UH-60 (Blackhawk)
stator windings provides the 115/200 vac
output . The ac outputs of the other two
Control and regulation of the AGPU elec-
windings are full-wave rectified to pro-
trical and pneumatic systems is auto-
matic. Electronic devices monitor and
vide 28 vdc output.
regulate electrical voltage, frequency,
and current; as well as pneumatic out-
The permanent magnet provides a three
puts. Control of the hydraulic system
phase output whenever the generator is
is semi-automatic, in that the operator
driven by the engine. When the engine
must set hydraulic pressure, and select
reaches 95 percent speed, a relay con-
operating modes.
nects the permanent magnet output to the
b. Exterior Features. A view of the
generator control unit (GCU), located
AGPU from the right rear is shown in
behind the control unit. The GCU recti
fies this ac voltage to provide dc con-
trol voltage for the GCU and dc excita-
the AGPU from the left front.
tion voltage for the generator exciter
C.
Engine/Gearcase. The gas turbine
field.
The exciter provides a three
engine (GTE), figure 1-3, provides pneu-
phase output which varies in magnitude
with the field excitation. The exciter
matic power, and shaft power to drive an
Change 2
1-2
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