vides the adjustment for controlling engine
proper operation of the lubricating and serv-
speed.
icing unit.
h. Fuel Gage. The fuel gauge (9) indicates
2-9. Controls and Instruments
the amount of fuel in the fuel tank. The gage
The purpose of the controls and instruments
ranges from "empty" to "full".
and the normal and maximum reading of the
i. Bypass Switch. The bypass switch (11) is
instruments are illustrated in figure 2-3 and
located above the engine ignition switch on the
described in the following paragraphs.
control panel. Its function is to bypass the
a. Ignition Switch. The ignition switch
low oil pressure safety switch during the
(16, fig. 2-3) is an ON-OFF switch that con-
starting procedure so as to permit engine
trols the engine magneto circuit.
starting.
b. Start Switch. A pushbutton type start
j. Alcohol Dispenser. The alcohol dispenser
switch (14, fig. 2-3 ) is located in the lower
(6) is bracket-mounted to the engine side of
left-hand corner of the control panel and is
the lubricating and servicing unit, and is used
utilized to operate the starter motor.
to prevent freezing of condensed air in the air
lines and pumps. A needle valve controls the
c. Choke Control. The choke control (10) is
rate of alcohol flow from the dispenser.
located on the engine control panel and enables
the operator to enrich the fuel mixture for
k. Air Valve. The air gate valve (47) is
starting purposes. Pull out the choke control
located at the air receiver on the engine side
to enrich the fuel-air mixture in the car-
of the lubricating unit. The valve releases air
buretor. When the choke control knob is pulled
from the air receiver, through the air hose
out as far as it will go, the carburetor choke is
reel, to the master air valve. To release air
fully closed. When the engine starts the choke
from the air receiver, turn the handle counter-
control must be pushed back in to open the
clockwise.
carburetor choke. If this is not done, the
l. Reel Brakes. A hand-operated reel brake
engine will lack power and could stop by
(45, fig. 2-3) is mounted on the hub of each
"flooding out".
hose reel to permit locking of the hose reels
d. Oil Pressure Gage. The oil pressure gage
at any position during operation or after oper-
(13) is a dial-type instrument which indicates
ation. The reel brake is a lever-type control.
oil pressure in pounds per square inch. Under
m. Engine Exhaust Diverter Handle. T h e
normal operating conditions, the oil pressure
two engine exhaust diverter handles (22) are
gage should indicate a reading of between 20
used to either direct heat from the engine ex-
and 35 psi after the engine is thoroughly
haust into the hot air reservoir, or direct
warmed.
exhaust gases through a hose to the atmos-
e. Battery-Generator Indicator gage. T h e
phere outside the unit.
Battery-generator gage (12) is located on the
n. Air Pressure Regulators. Individual air
control panel. It is a dial-type instrument
pressure regulators (24) for the three lubri-
which shows the condition of the battery. If the
cating pumps are mounted on the air line be-
indicator is on the red on the left, the battery
tween the air receiver and the lubricant pumps.
is dead; on the yellow, the battery is partially
Air pressure to the lubricating pumps is con-
charged; on the green, the battery is fully
trolled by the air regulators. The exact air
charged and on the red on the right, the bat-
pressure to operate the pumps must be de-
tery is overcharged.
termined by the operator, based upon volume
f. Panel Lights. Two panel lights (7) are
or delivery rate required. To increase air
located on the top of the control panel and are
pressure to the pumps, turn the regulator
operated by individual switches on the bottom
handle clockwise.
of the lights.
o. Air Pressure Gage. Air pressure gage
g. Throttle Control. The throttle control
(25) is mounted on each of the three air regu-
lators. Each gage registers the amount of air
(15) is located on the control panel and pro-
