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FIGURE 3-9.  COMPRESSOR OIL PUMP AND DRAIN PLUG
3-14.3.  COMPRESSOR INTAKE AIR CLEANER FILTER.

TM-5-4310-393-14 Air Compressor Diesel Engine Driven 20 CFM 3200 PSI Model KA7-DA Manual
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TM 5-4310-393-14 a. Remove  cap  nut  (Figure  3-10,  Item  1)  to ex pose setscrew ( 2). b. Remove tube plug (4). c. Connect a calibrated oil pressure gauge to the  oil  pressure  regulator  test  connector  (4)  to  read  oil pressure (the connector is 6mm L tube). d. Start compressor. e. Using  a  screwdriver,  turn  setscrew  (2)  in oil pressure regulator (5) to adjust oil pressure.  Turn the setscrew clockwise to increase pressure; counterclockwise to reduce pressure. FIGURE 3-10.  OIL PRESSURE REGULATOR f. Oil pressure should be 850 psi +/- 50 psi. g. If  bubbles  are  observed  In  the  regulator  sight  glass  (3)  on  the  oil  pressure  regulator  (5),  it  is  necessary  to vent the pump; refer to paragraph 3-5.4 and 2.  above. 3-14.2.  COMPRESSOR DRIVE V-BELT This task covers: A.  Inspect B.  Adjust C.  Replace Tools: Materials/Parts: Tool kit, General Mechanic's Set V-Belt (PIN BET-0021) Equipment Conditions: Compressor Unit Shut Down Purge All Air Pressure V-Belt Guard Removed A Inspect. 1 Inspecting the Drive System. a. Check tension of V-belt when joining the engine drive unit to the compressor unit. b. Press down on the belt midway between sheaves.  Deflection should be /2 inch. c. V-belt  should  be  free  of  cracks,  frayed  edges,  breaks  in  covering  and/or  broken  cords.    Sheave  grooves should be free of excessive wear, corrosion and rough spots.  The belt should fit in the groove without bottoming. B. Adjust. 1. Adjusting the Belt Tension. a. Loosen the engine mounting bolts and slide the engine as necessary to obtain proper tension. 3-18







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