TM-9-2815-220-34 Direct Support Manual for AVDS-1790-2C and AVDS-1790-2D Engines Download
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TM 9-2815-220·" (7) Exhaust gas temperatures, measured at individual ports, must not exceed 1250 degrees F. Temperature variation between cylinders must not exceed 150 degrees F. (8) At completion of test schedule, check acceleration, idle speed, and idle oil pressure. Acceleration should be checked with a moderate steady throttle movement. (9) If power is outside limits, check for cause and make correction. Gross corrected hp. shall be maintained between 735 and 780 at 2400 rpm, full rnck and full load (fig. 3-40). (I 0) Goveor shall be adjusted to limit the engine no load speed as follows: � Low Idle High Idle 750 � 700 0 a w 650 0 600 / � 1800 , � . � v . v 2000 2200 ENGINE SPEED - RPM 675-725 2600-2640 - 2400 TA05557ll ge 3·3( fean פrfornct ciuve. R un No. Time {min.) Table J-28. T Schule Rpm Scale units I. 10 700 Warm up Bhp. obs. Torque lb·ft. 2. 15 1000 16.0 16.0 85 3. 15 1400 83.5 116.9 440 4. 20 1800 159.S 287.1 837 5. 20 2200 195.0 429.0 1024 6. 20 2400 208.0 499.2 1092 7. 30 2400 229.0 549.6 1202 8. 30 2400 °FR·FL •FR-FL •FR·FL 9. Check for low idle at 675-725 rpm - Adjust if necesry. · 10. Inspect for oil and fuel leaks. 11. Check goveor high idle speed. This sha 2600-2640 (no ld·water of. If adjustment is required, recheck horsepower at 2400 ruu load. 12. AVDS-1790-2DR Enes: Adjust auxiliary drive governor sפed to 1750·1800 rpm, no load·water off. 13. 5 2400 °FR·FL 14. S 2200 °FR·FL IS. 5 2000 °FR·FL 16. 5 1800 °FR-FL •full rack and fu load. 250 Change2 (I I) Adjust for smooth low idle, if necessary. Goveor under-run below low idle selling during decelerntion is pennissible providing the governor return lo low idle response is positive with steady operation al the low idle setting. (12) During lest with oil temperature of I 40 degrees to 250 degrees F. at the oil cooler outlet, the oil pressure shall not be more than 70 nor less than 40 psi measured al and/or adjacent lo the pressure sending unit, when the engine is operating at 2400 rpm, using Grade 30 oil, and shall not be less than 15 psi when engine is idling. (13) After completing run No. 16, check flame heater system for operation and fuel leaks. (14) If the engine will be used in 30 days, remove from test and cap or plug all openings. If the engine will be stored longer than 30 days, presee as directed in paragraph 3-192. NOTE Any new cylinders that were installed while repairing the engine should have the intake and exhaust tappet settings rechecked at this time, refer to paragraph 2-52. NOTE If a dynamometer is not available, the engine may be installed in a vehicle and the vehicle driven at equally increasing speed increments from 0 to maximum speed in IS-minute intervals over the first three hours of opera- tion. The engine may then be considered run-in. 3·1\. Engine Preservation a. Equip an auxilia fuel container, with a fuel line, and fill with a sufficient amount of preserva- tive oil, conforming to Specification VV-L-800, to operate the engine as prescribed below. Arrange the container to provide adequate pressure to assure proper supply of the preservative oil to the fuel system. Disconnect the fuel line at the most convenient point nearest to the engine fuel pump and connect the line from the auxiliary fuel container to the fuel-to-engine line at the point of disconnect. Disconnect the engine fuel retu line and connect a transparent plastic tube to the fuel retu connection. Insert other end of plastic tube into a container to collect the retu diesel fuel. The fuel valve on the auxiliary fuel container shall tued to the "ON" position; the engine started and operated at 750-1000 RPM until observed fuel return is purged of diesel fuel and the system filled with preservative oil. b. Remove engine from test stand and cap or plug all openings. ) )