FIELD LEVEL MAINTENANCE
TACTICAL QUIET GENERATOR 100 kW, 50/60 Hz MEP-807A/PU-807A
EQUIPMENT DESCRIPTION AND DATA
EQUIPMENT CHARACTERISTICS, CAPABILITIES, AND FEATURES
The 100 kW Tactical Quiet Generator (TQG) is skid-mounted and is designated MEP-807A. When the 100 kW
TQG is mounted on a trailer, it is designated PU-807A. The 100 kW TQG consists of a diesel engine that can
operate using diesel fuel or aviation fuel, a brushless alternating current (AC) generator, a digital voltage
regulator, an electronic governing system, a fuel system, a 24 Vdc cranking system, and other devices as
required to achieve a complete engine driven generator set. The system uses the Caterpillar 3126B engine and a
Marathon generator model DOD 431 FR. The engine is electronically controlled. The electronic control
is essential to meeting U.S. Environmental Protection Agency (USEPA) and fuel consumption requirements. All
the electrical components and assemblies (including the voltage regulator) that provide the required
instrumentation and control functions are contained in the Electronic Modular Control Panel (EMCP) located on the
generator end (REAR) of the set. The generator end of the TQG is considered the rear of the generator in the
following descriptions. Opening the EMCP and side access panels gives access to all the electrical components
and essential engine components. Paralleling receptacles are used to connect the paralleling cable
between generator sets of the same family. The generator set family includes a 200 kW TQG. The 200 kW TQG
is skid-mounted and is designated MEP-809A. When the 200 kW TQG is mounted on a trailer, it is designated PU-
809A. These generator sets use the same control system as the MEP-807A and PU-807A 100 kW TQG and can
operate in parallel to share an electrical load.
LOCATION AND DESCRIPTION OF MAJOR COMPONENTS
The engine for the 100 kW TQG is the Caterpillar 3126B engine (Figure 1, Sheet 1, Item 4). The engine is
electronically controlled. The Engine Control Module (ECM) controls the amount of fuel that is injected by
the unit injectors. The EMCP provides frequency (speed) control, controls long and short-term stability, and
adjusts to load conditions. High injection pressures help to reduce fuel consumption and emissions. Precise
injection timing optimizes engine performance for starting, emissions, noise and fuel consumption.
AIR CLEANER ASSEMBLY
The air cleaner assembly (Figure 1, Sheet 1, Item 1 and Sheet 5, Item 1 REF) is located on the left side of the
engine inside the rear access doors. The air cleaner filters intake air used for engine combustion. The air cleaner
is equipped with a restriction indicator (refer to TM 9-6115-729-10, WP 0012/WP 0014).
The muffler/exhaust system (Figure 1, Sheet 1, Item 2) and exhaust tubing are connected to the engine exhaust
manifold and turbocharger. This system reduces engine exhaust noise. Exhaust gases are exhausted upward
from the top of the generator set.
The turbocharger (Figure 1, Sheet 1, Item 3) is located on the right side of the engine. Powered by engine exhaust
gases, the turbocharger compresses air from the air filter to provide pressurized air to the engine for combustion.