TM 55-4920-384-13&P
hot air source, 24 volt auxiliary battery, spray can
(3) Turn compensator control (counter-clock-
ether etc:
wise for pressure decrease, clockwise for pressure
(2) Follow instructions for starting under nor-
increase) until a pressure drop is observed on the
mal conditions. Refer to paragraph 2-1b.
gage. Gradually turn compensator control (16, fig.
CAUTION
(4) Open by-pass valve and close outlet valve.
Do not disconnect governor or
(5) Couple inlet and outlet hoses to fittings (3
attempt to race the engine to
and 4, fig. 1-2) and to system being tested. Open out-
speed up warm up process. This
let valve and close by-pass valve. The pump will now
is extremely dangerous under
provide a constant pressure with a variable delivery
as required by the system up to the pre-set volume.
any conditions.
e. Manual Start.
g. Stopping the Engine.
(1) Perform operations for normal electrical
(1) Remove load and turn ignition (23) switch
star . Refer to paragraph 2-lb (1) thru (8).
to OFF.
(2) If engine has been running hard and is hot,
thru 1-2 revolutions. Push choke (21, fig. 19) in ap-
do not abruptly stop it at full load but remove the
proximately halfway and then pull up crank brisk-
load and allow the engine to idle for approximately
ly. (Do not attempt to spin the engine). Repeat as
5-10 minutes.
necessary. If flooding should occur push choke in
(3) In the event a "dieseling" effect occurs
fully and continue cranking.
(engine continues to run with ignition off), rapidly
open throttle while turning ignition off. The engine
f. Cold Weather Start. (-65 F. to -25 F. )
will stop.
(1) Apply starting aids, such as engine covers,
Section II. OPERATING UNDER UNUSUAL CONDITIONS
(3) Keep the engine shrouding, cylinder
2-2. Operating Under Unusual Condi-
heads, fins, and the air opening in the housing free
tions. Instructions outlined below are appli-
of dirt and obstructions.
cable to the respective conditions described.
c. Operating in Dusty or Sandy Areas.
(1) Lubricate the test stand in accordance
a. Operating in extreme cold.
with Table 2-1. Keep lubricants, grease gun, oil con-
(1) Change to the engine oil specified in Table
tainers, and fittings clean.
2-1 for extreme cold.
(2) Protect the test stand from dust and sand
(2) Keep the electrolyte at the proper level in
as much as possible. Keep the unit clean and free of
the battery, and the battery fully charged. If water
foreign matter.
is added to the battery, run the engine long enough
(3) Cover the unit with a tarpaulin when not
to thoroughly charge the battery.
in use.
(3) Close engine compartment doors as re-
(4) If possible, wet down the area surrounding
quired to maintain satisfactory engine operating
the oeration side to keep down dust and sand.
temperature.
(5) Service the engine air cleaner daily.
(4) Remove oil from the air cleaner and re-
place with proper grade of oil per instructions on air
d. Operating Under Rainy or Humid Condi-
cleaner housing.
tions.
b. Operating in Extreme Heat.
(1) Lubricate the test stand in accordance
(1) Locate the test stand in a well ventilated
with Table 2-1.
area and keep all door assemblies OPEN during
(2) Keep the fuel tank full to prevent accumu-
operation. (fig. 4-9).
lation of condensation.
(2) Lubricate the test stand in accordance
(3) Keep electrical components clean and dry.
with Table 2-1.
(4) Cover the test stand with a tarpaulin or
similar protection when not in use.
