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AIR COMPRESSOR ASSEMBLY (Cont). - TM-5-4310-451-14_24
AIR COMPRESSOR ASSEMBLY (Cont). - TM-5-4310-451-14_26

TM-5-4310-451-14 Compressor Unit Reciprocating 5.0 CFM Model CAPITANO-PD Manual
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TM 5-4310-451-14 1-14.  AIR COMPRESSOR ASSEMBLY (Con’t). (3) If less than the rated capacity of air is required, the service line pressure will rise above 100 psi (690 kPa).  The pressure  regulating  valve  (16)  gradually  opens,  applying  pressure  to  the  diaphragms  on  the  sullicon  control  (13).    This causes the sullicon control to partially close the inlet valve (14) and reduce the speed of the engine (9).  As the pressure increases,  the  sullicon  control  will  further  close  the  inlet  valve  and  continue  reducing  the  engine  speed  until  it  reaches loaded speed.  The sullicon control has an opening (15) in its cover which vents a small amount of air to the atmosphere when the pressure regulating valve is open.  This allows the sullicon control to vary air output matching air demand.  The opening also bleeds any accumulated moisture from the sullicon control.  The air compressor assembly will continue to run in this manner until air demand increases.  As air demand increases, pressure in the oil separator (1) will fall below 100 psi (690 kPa).  The pressure regulating valve will close, the inlet valve will be fully open, and the engine will once again run at full speed. (4) The blowdown valve (17) is held closed by a pressure signal from the air  compressor  (2).    Upon  shutdown,  the pressure signal is lost and the blowdown valve opens venting oil separator pressure to the atmosphere. e. Air Inlet System. (1) The air inlet system consists of two air cleaners (19) and restriction indicators (18), an air inlet valve (14), and   interconnecting   piping   to   the   engine   (9)   and   air compressor assembly. (2) The air inlet valve (14) controls the amount of air intake   to   the   air   compressor   (2)   in   response   to   the operation of the sullicon control (see subpara graph d). (3) The    air     cleaners     (19)     are     three-stage     dry element type filters.  These filters are capable of cleaning extremely    dirty    air;    however,    in    such    cases    more frequent  checks  of  the  restriction  Indicators  (18)  will  be required.    The  restriction  indicator  will  be  red  when  re- striction  of  air  passing  through  the  air  cleaner  becomes too high. f. Instrument   Panel   Group.      The   instrument   panel   group   consists   of   a   panel   containing   an   engine   coolant temperature  gage,  engine  oil  pressure  gage,  air  pressure  gage,  air  compressor  discharge  temperature  gage,  ammeter, tach/hourmeter, ON/OFF engine switch, engine start button, override button, emergency stop control which is located on the outside just below the instrument panel window, a cold start valve, fuse, and ether starting aid kit. g. Electrical System. (1) Refer to the wiring diagram in paragraph 4-61 for the location of major components of the electrical system. (2) The electrical system is  comprised  of  not  only  the  necessary  equipment  required  to  operate  the  air  compressor unit, but also a system to shut down the air compressor unit in the event of a malfunction. (3) The components of the electrical system are: (a) Engine starter with an integral solenoid. (b) Two batteries. TA704683 1-17







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