m. Initial Tests.
Caution: Do not fill the gasoline tank
(1) Disconnect the ignition cables from the
while the engine is in operation.
spark plugs. Turn the engine over several
Provide a metallic contact between
times by hand to make sure that all parts
the container and the tank when
move freely without binding. If binding is
filling.
detected, refer this condition to the proper
d. Oil. Fill the crankcase of the engine, and the
authority.
If there is no indication of
crankcase of the compressor, as specified in LO 5-4930-
binding, connect the ignition cables to the
202-12.
spark plugs. Disengage the clutch before
starting the engine.
e. Meters and Gages. Inspect the meters and
(2) Start the engine. Refer to paragraphs 48
gages. See that they are in proper operating condition
and 49 for starting instructions.
and securely mounted.
(3) Engine speed is regulated by the governor
control, which may be adjusted to regulate
f.
Leaks, General.
Inspect for leaks, giving
the operating speed of the engine (par.
particular attention to the fuel, air, lubricating and oil
112). The governor on the engine is preset
lines, and connections.
by the manufacturer at a nominal engine
Note. Report to proper authority,
speed of 3,600 rpm at no load operation.
leaks that cannot be corrected by
(4) Stop the engine (par. 50).
tightening connections.
(5) Turn over the compressor several times, by
hand, to make sure that all parts move
g. Fire Extinguisher. Check the condition of the fire
freely without binding.
If binding is
extinguisher. Inspect for full charge, proper working
detected, report this condition to the proper
order, and secure mounting.
authority.
(6) Start the engine and place the clutch lever
h. Clutch. Inspect the clutch assembly for proper
in the engaged position. Note if the air
adjustment. Refer to paragraph 128 for clutch assembly
pressure rises to 175 psi, and whether the
adjustment instructions.
air compressor automatically unloads at that
pressure. Release the air pressure from the
i.
Electrical System.
See that all electrical
air receiver and note if the air compressor
connections, particularly at the magneto, coil, and spark
automatically loads at 150 psi.
If the
plugs, are securely connected.
unloading or loading points are more than 5
psi from the stated limits, adjust the
j. Battery. The batteries for the unit are shipped
compressor pressure switch setting (par.
dry-charged. The electrolyte for filling the battery cells
is shipped in separate containers. Fill the batteries with
(7) Test the tightness of all couplings,
electrolyte until the level is one-fourth inch below the
connections, adapter hose lines, manifold
filler holes. When the batteries are filled, place them in
connections, control valves, head gaskets,
the battery box and connect the batteries. Use the
or any other points of possible leakage. If
negative battery terminal for ground connection.
any leaks are found, tighten joints or replace
the defective parts.
Warning: Clean up any spilled
(8) Test the lubricant pumps (par. 53).
electrolyte with water.
Keep the
(9) Connect the heater gas line quick
electrolyte off the skin to prevent
disconnect coupling (17, fig. 9) and the
personal injury.
heater power line connector (2, fig. 40).
k. Crankshafts. Remove the ignition cables from
(10) Adjust belt tension by loosening the bolts
the spark plugs and turn the engine and compressor
holding the engine in position on the
crankshafts several turns to be sure that the pistons and
mounting blocks, and moving the engine
bearings are not binding.
outward to attain proper tension.
The
l. Cooling System. Be sure all cooling fins and the
tensions are correct when the belts can be
air shrouds are free of dirt or material which might
depressed without effort, approximately 1/2
hamper proper cooling of the engine and the
to /4 inch midway between the pulleys.
compressor.
15