(2) Place master switch in preheat position.
Lamps L2 and L3 shall light indicating that the pre-
heat circuitry is correct.
(3) Place master switch in start position. Lamps
L1, L2, L3, L-4, L5 and L6 shall light indicating that
all circuits for starting are correct.
(4) With the master switch in the start position,
open switch S1. Lamp L1 shall extinguish indicating
that the start disconnect circuitry is correct.
(5) With the master switch in the start position.
Close switch S2 and then, place the master switch in
the prime and run position. Lamps L2 and L3 shall
extinguish. Lamps L4, L5 and L6 shall remain lit
indicating that the prime and run circuitry are cor-
(6) With the master switch in the prime and run
position and lamps L4, L5 and L6 lit open switch S2.
Lamp L4 shall extinguish indicating that the engine
protective devices circuit and the prime circuit is
(7) Repeat the procedure of step 5, except that
the master switch shall be placed in the prime and
run aux fuel position after closing switch S2. Lamps
L4, L5, L6 and L7 shall remain lit indicating that
the prime and run aux fuel circuitry is correct.
(8) With the master switch in the prime and run
aux fuel position and lamps L4, L5, L6 and L7 lit
open switch S2.
that the engine
prime circuit is
Lamp L4 shall extinguish indicating
protective devices circuit and the
(9) Place master switch in the stop position.
All lamps shall be out indicating that all stop circuits
(10) Place panel light switch in the on position
Panel lights shall be on indicating that the panel light
circuit is correct.
(11) Reposition all switches as in step 1 and dis-
connect test setup.
(12) Test CR1 and CR2 as follows:
(a) Remove wires from terminals 6 and 7 of
(b) Measure forward and backward resistance
of CR1 between terminals 5 and 6 of A1. Resistance
should read high in one direction and low in the other.
If not, CR1 is bad.
(c) Measure forward and backward resistance
of CR2 between terminals 7 and 8 of A1. Resistance
should read high in one direction and low in the other
If not, CR2 is bad.
(1) Control Cubicle. Attach control cubicle (1, figure 4-34) to
four vibration mounts (5) with four screws (2), Iockwashers (3), and
flatwashers (4). Attach ground strap (7) to cubicle support frame
with screw (6) and nut (8). Attach two connectors from wiring har-
ness to connectors on back of control cubicle. On ASK equipped
generators, install rear panel assembly (para. 5-7).
Section XIII. MAINTENANCE OF ENGINE
4-39. DESCRIPTION AND FUNCTION.
(See figure 4-36. ) The engine assembly is a two
cylinder, air cooled, overhead valve, fuel injected
diesel equipped with; a blower housing (1) and a
shutter assembly (2) used to direct and control
cooling air, an oil cooler (3) and gear type oil pump
used to cool and circulate lubricating oil in the
engine, a replaceable cartridge type oil filter (4) to
remove contaminants from the lubricating oil, fuel
injection pump (5) to supply metered fuel to the
engine combustion cylinders through fuel injectors
located in the cylinder heads, air intake manifold (16)
and heaters (18) that receive combustion air from the
external air cleaner (9) and heat the combustion air
if required, starter motor (6) coupled to the engine
drive gear for cranking the engine for starting, a cor-
rosion resistant exhaust muffler (7) to reduce engine
exhaust noise, and a mechanical governor used to
maintain engine speed at 1800 RPM under varying
4-40. EXHAUST MUFFLER ASSEMBLY
a. Inspect (see figure 4-37). If engine exhaust is
noisy or if exhaust gases are detected from shutter
assembly, indications are that muffler (3) or gaskets
(4) and (6) may be defective.
b. Remove. Remove shutter assembly as outlined
in paragraph 4-17. Bend lock tabs (2) down and
remove four nuts (1) holding muffler (3) in place.
Remove lock tabs (2), mufflers (3). muffler gaskets (4),
adapters (5) and adapter gaskets (6) from each
c. Replace. Place gaskets (6), adapters (5) in place
on each cylinder head. Slide new muffler gaskets (4),
muffler (3), and lock tabs (2) over studs (7) in cyl-
inder head and secure to cylinder head with nuts (1).