3-14.2. COMPRESSOR DRIVE V-BELT

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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