MTD 584 Operations Instructions download pdf (Page 37)

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TM 5-6115-584-12

NAVFAC P-8-622-12

TO-35C2-3-456-1

TM-05682C-12

Section II. DESCRIPTION AND DATA

DESCRIPTION OF GENERATOR SET.

This unit is a 5 kilowatt, 60 Hertz Generator Set. It consists

of a revolving field alternator powered by an air cooled diesel

engine.

See figures 1-1 and 1-2 for the location of major

components and figure 1-2.1 for generator with acoustic

suppression kit (ASK) installed.

a. Engine.

(1) The engine powering this Generator Set is a

cylinder,

4 cycle air cooled engine, with a 70 cubic

tncb (cu. in) displacement. A mechanical

governor

keeps engine

speed at 1800 revolutions per minute

(RPM)

under rated load conditions.

(2) Fuel is supplied either from this unit's self-

contained fuel tank or, by using an adapter, directly

from a 55 gallon drum or other source. The fuel is

filtered by two cartridge type fuel filters and a single

fuel strainer. Two electric,

self-priming fuel pumps

pump fuel to the fuel injection pump which delivers

the fuel at high pressure to fuel injection nozzles in

the cylinder head. When auxiliary source of

fuel is

used, three electric fuel pumps are Used.

(3) Two

12 volt “wet cell” battertes in series

supply

power for a 24 volt electric starter and for

glow plugs, located in the cylinder head, and two air

heaters

located

in the intake manifold, used for cold

weather starting. An alternator

located beneatb the

blower

wheel and completely separate from the main

alternator automatically recharges these batteries

when the engine is operating.

b. Generator.

The generator on this set is a four pole, revolving

field type. Alternating current, supplied by the exciter

assembly, is recitified and used to create the four

pole, revolving field. A “solid-state” voltage regula-

tor assembly automatically adjusts this current to ob-

tain a constant (±3%) voltage in the main stator (out-

put) windings.

c. Controls.

All operator controls and indicator gauges necessary for

running the engine Generator Set are located on the

control panel. On ASK equipped generators, an oil

pressure gauge is located on the engine under air intake

door and a fuel level gauge is located on the fuel tank. The

speed control is located behind a small flap on the rear

panel assembly below the control panel.

Controls for selecting output voltage are located on

the output control box

Generator Set Electrical System (see schematic

figure 1-7).

(1) General. The generator set's electrical sys

tem consists of two distinct systems (1) the dc system

used primarily for operating control and excitation

and (2) the ac output system to supply power to the

The dc source consists of a 24 volt battery set (BT1

and BT2) that is kept charged by a battery charging

alternator (G2) and voltage regulator rectifier as-

sembly (A5). Fuse (F1) protects the alternator from

overload Circuit breaker (CB2) protects the battery

charging system from overload. Slave receptacle (J15)

permits an alternate external supply to be connected

to the battery circuit.

(2) Operation. Placing MASTER SWITCH (S1)

into the PREHEAT position, the preheat relay R2 is

activated to energize the heater elements (ER1 and

ER2) and the engine glow plugs (HR3 and HR4).

Placing the MASTER SWITCH in the PRIME-RUN-

AUXILIARY position activates the fuel pumps E2 and

E3 as well as the auxiliary fuel pump E1. If the fuel

level is down, the fuel level switch S3 will be closed

and the auxiliary fuel solenoid will actuate permit-

ting fuel to be pumped into the tank.

Placing the MASTER SWITCH (S1) into the PRIME-

RUN position maintains power to the main fuel pumps

but deactivates the auxiliary fuel pump.

(a) Start. Placing the MASTER SWITCH (S1)

into the start position maintains the fuel pump cir-

cuits and the preheat circuits to the glow plugs (HR3

and HR4) as well as to energize the governor sole-

noid K5) and start relay (K1). The crank relay

(K3) is eneregized, in turn energizing the start sole-

noid (K6) and activating the starter (B1). The gov-

ernor brings the engine to speed, building up oil

pressure and closing oil pressure switch (S5). The

exciter field is flashed during this starting procedure.

(b) Run. Placing the MASTER SWITCH (S1) in

the PRIME-RUN position keeps the governor solenoid

(K5) energized thru the now closed oil pressure switch

(S5)and fuel will be supplied to the engine as long as

the oil pressure is normal and the align temperature

switch (S4) is not activated by high temperature.

the OFF position de-energizes the governor solenoid

(K5) shutttng off fuel to stop the engine. High temper-

ature or low oil pressure will also shut the engine

down.

(3) AC Circuitry. The main alternator (G1) is

wound with six pairs of coils that may be connected

by the AC Reconnect switch (S6) into various com-

binations, the output of which is available at the load

terminal board (TB1). Circuit breaker (CB1) protects

the alternator from overloads. The volt/ampere se

lect switch (S8) permits switching voltmeter (M5) and

ammeter (M4) to read the load current and voltage

for the various arrangement of outputs.

Voltage regulator (A2) and current voltage trans-

former CVT1 monitors the alternator output voltage

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MTD 584 Operations Instructions Page 37

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