However, If the procedure is interrupted, always close
a. Use the proper viscosity engine lubricating oil (refer
the shutoff valve on the instrument panel, disconnect
the air chuck from the device being charged, and blow
b. Make certain 27-volt direct current is applied to the
down the filter and separator assembly immediately
unit (refer to paragraph 2.5.9).
upon stopping the engine. When resuming operations,
be sure to allow the pressure in the receiver to build up
to the pressure in the partially charged device before
2.8.2
EXTREME HEAT.
The compressor package
connecting the air chuck and opening the shutoff valve.
assembly can be operated at ambient temperatures up to
125F (51C) exactly as specified in paragraph 2.6.1.
NOTE Continued effective filtering
action is assured only if the filter
2.8.3
EXTREME
HUMIDITY.
When operating the
compressor package assembly under extremely humid
and separator assembly is blown
climatic conditions, proceed as specified in paragraph 2.6.1
down at least once every fifteen
except reduce the intervals between condensate blow
minutes
of
continuous
downs as necessary to assure the delivery of dry, pure air.
compressor operation, and at the
end o: each charging cycle.
2.8.4 EXTREME DUST, SAND, GRIT. Although the
compressor package assembly has been especially
2.7 SHUT DOWN
designed to operate efficiently under adverse climatic
conditions, when the equipment is used in areas where
2.7.1 At the conclusion of daily charging operations:
airborne material is excessive, observe the following
precautions:
a. Close the fuel line shutoff valve.
a. Keep the intake end of the compressor air inlet
b. Close the receiver shutoff valve.
hose off the ground and located such that a minimum
amount of sand, dirt and other foreign material is drawn
c. Open the system drain valve.
into the compressor along with ambient air.
d. Open one or other of the shutoff valves on the
b. Reduce the intervals between periodic cleaning of
instrument panel to exhaust high pressure air in the
the overall equipment. Be especially careful to remove all
receiver to atmosphere.
caked deposits from between the cooling fins of the
e. Close all access doors.
aftercooler, the interstage connecting tubes and the
compressor cylinders.
f. Refill the engine fuel tank.
c. Change the compressor lubricating oil and service
the gasoline engine at more frequent intervals than for
2.8 OPERATION UNDER UNUSUAL CONDITIONS
normal operating conditions.
2.8.1 EXTREME COLD. Operation of the compressor
d. Clean or replace the compressor intake filter as
package assembly at temperatures below 30
often as necessary to assure the efficient intake of air.
Fahrenheit is the same as specified for routine operation
except as follows:
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