TM 5-4310-452-14
1-16. LUBRICATION SYSTEM (Con't).
Key
Component
Description
1
Inlet Air Cleaner
Prevents foreign particles such as dirt and water from being inducted into the
compressor air inlet.
2
Air Actuating
Acts in unison with the pressure regulator to adjust the engine governor to load
Governor Control
demand.
3
Compressor
A positive displacement, helical-type compressor consisting of two, one-piece
meshing helical rotors within a compression chamber. Operating at high speed
within a tight casing, the rotors draw air in from the top inlet, compress it axially, and
discharge it from the bottom at the opposite end. Cooled oil is injected into the
compression chamber under controlled pressure to cool the air, seal the rotor
clearances, and lubricate the rotor surfaces. Pressure lubrication is also supplied to
the gears and bearings. The oil which mixes with the air during compression passes
into the oil separator.
4
Unloader Valve
Controls the compressor capacity by throttling the volume of air admitted to the
Assembly
compressor. Unloader valve assembly is air-operated.
5
Oil Cooler
Cools compressor lubricating and cooling oil to prevent over-heating of the
compressor.
6
Oil Temperature
Regulates cooling and lubricating oil flow to partially bypass the oil cooler when oil
Bypass Valve
is cold. Valve modulates oil flow between bypass and oil cooler to maintain an
optimum oil temperature.
7
Oil Filter Assembly
Removes foreign particles from the compressor lubricating and cooling oils.
8
Manual Blowdown Valve
The hand-operated valve can relieve the oil separator system of all pressure. Use
only if the safety relief valve does not work,
9
Safety Relief Valve
Releases compressed air from the oil separator system to the atmosphere when air
pressure exceeds 150 psi (1034 kPa).
10
Oil Separator
Receives compressed air and oil mist from the compressor. Most of the oil
immediately falls to the bottom of the oil separator tank. Any oil remaining in the air
is removed by the oil separator. In addition to lubricating and cooling oils, the oil
separator stores compressed air. The pressure of the compressed air in the oil
separator tank is indicated by the discharge pressure gage.
11
Automatic Blowdown
Vents compressed air from the oil separator to the atmosphere when the engine is
Valve
turned off.
12
Regulating Valve
Automatically regulates engine speed and air volume passing through the inlet
unloader valve by sensing air pressure in the oil separator system and acting
pneumatic cylinder.
13
Minimum Pressure
Ensures that excess lubricating and cooling oil is not drawn into the air service lines
and Service Valve
by closing automatically when the pressure in the oil separator system drops below
75 psi (517 kPa).
1-17