TM-9-2815-220-34 Direct Support Manual for AVDS-1790-2C and AVDS-1790-2D Engines Download
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) (6) Check operation of manual fuel shutoff (fig. 3-339.1). (7) Open bleeder valves (fig. 3-338.1) on both the primary fuel filter and the fuel/water separator filter. Turn on source supply fuel pump and bleed air from filters. Close bleeder valves when fuel nows from tilter. WARNING Do not attempt to start engine unless the fuel shutoff solenoid is connected and ascertained to be operative. F+re J.JJ9.J. gine connection pofnfl-left front �ftw, model A VDS·l 790·2DR engine. I (8) Crank engine several revolutions with the fuel shutoff in the "OFF" position to make certain the engine is not hydrostatically locked and is otherwise fe. (9) Wash all fuel and oil from the engine. c. R1111-/11. (I) Start the engine with the throttle lever in idle position. Oil pressure should be a minimum of 15 psi within 20 seconds. CAUTION Do not operate the starter motor contin- uously r more than 30 seconds. Allow a two-minute cool-off period before renergiz- ing the starter. (2) Run the engine at 700-750 RPM and check for fuel and oil leaks. Should leakage be detected, immediately shut off engine and repair. After five minutes of operation, check oil level and add sufficient oil to bring oil level to "FULL" mark on oil level gage. Oil level must b e determined with engine idling. TM 9-2815-220-34 CAUTION Do not run engine longer than I 0 minutes at 700�750 RPM without cooling fans. (3) Stop engine. Remove two fan rotor hub sleeve spacers. Install engine cooling fans (para 3-189). Check cooling fan blade clearance (para 3-189). Install cooling fan vanes (para 3-189). d. Final Test (I) Start engine and check all i terns vital to safe engine operation, such as fuel lines, oil lines, oil pressure, throttle control, mounting bolts, couplings, thermocouple haess, etc. Make sure test cell, observation window, and control room are neat and clean. During the wam1-up period, fill out heading of lbg sheet completely. (2) On Models AVDS-1790-2C and AVDS- 1790-20, adjust for idle at 700-750 RPM by tuing idle adjusting screw (D, fig. 2-57). Loosen locknut on idle adjusting screw and turn screw clockwise to increase idle speed, and counterclock- wise to decrease speed. Tighten locknut. Allow engine to run for 15-20 minutes at 700-1000 RPM. Check for unusual noises in the engine and generator which might indicate malfunction or lack of lubrication. (3) On Model AVDS-1790-2DR, adjust for idle at 700-750 RPM by turning idle adjusting screw, (D, fig. 2-57.1). Loosen locknut on idle speed adjusting screw (fig. 2-148. 7) and turn screw clockwise to increase idle speed, and counterclock- wise to decrease speed. Tighten locknut. Allow engine to run 15-20 minutes at 700-1000 RPM. Check for unusual noises in the engine and generator which might indicate malfunction or lack of lubrication. Loosen locknut on solenoid control speed screw (fig. 2-148.7). Increase speed above 2000 RPM and activate solenoid. The solenoid should control engine speed at 1800 ± 25 RPM, no load. If adjustment is necessary, tu the screw clockwise to decrease speed, and counterclockwise to increase speed. Tighten locknut. (4) Perform test in accordance with the schedule in table 3-28. (5) Set manifold pressure manometers to current wet . barometer reading and entrance air inclinometer to dry barometer reading, as appli . - cable. (6) Check cylinders for firing. Enter time and RPM at start of each period. Complete readings as soon as engine temperatures have stabilized. Plot oil consumption every ten minutes at 2400 RPMfull load, during run No. 8 (table 3-28). Determine that the governor is not limiting the fuel flow. Chango 2 3-249