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Chapter 15. BODY AND CHASSIS ACCESSORY ITEMS MAINTENANCE
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TM-10-3930-673-34 All Terrain Lifter Army System (ATLAS) 10 000 lb Capacity Manual
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Receiver Drier
TM 10-3930-673-34
15-2. PRINCIPLES OF OPERATION (CONT)
b. Compressor. The compressor draws
vaporized refrigerant from the evaporator coil and
compresses the vapor to a high pressure, that is
necessary for condensation. The high pressure
vapor then moves into the condenser coil where
heat can be radiated to change the refrigerant back
to liquid. The compressor is equipped with an
electrically actuated clutch to engage or disengage
drive to the compressor.
The compressor V-belt pulley is mounted on a
bearing and is free to rotate without turning the
compressor crankshaft anytime electrical power is
disconnected. The field coil on the compressor is
energized by electrical current from either the
thermostat, high pressure switch, or low pressure
switch. Energizing the field coil creates a magnetic
force that locks the driven disk to the pulley and
TR01379
drives the compressor.
c. Condenser Coil. The purpose of the
condenser coil is to radiate enough heat energy from
the compressed high pressure vaporized refrigerant
so that the refrigerant changes from a vapor to a
liquid. This is done with cooling fins on the
condenser coil and the engine cooling fan.
TR01381
15-2

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