TM-9-2815-200-35 Maintenance Manual for AVDS-1790-2M AVDS-1790-2A and AVDS-1790-2AM Engines Download
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Figure 8-2. Engine connection points - left rear view. c. Starting Procedures. During cold weather, when ambient temperature is below 30 degrees F, use engine manifold flame heaters to start engine. Note. Do not attempt an engine start until the fuel shutoff solenoid is connected and ascer- tained to be operative. Caution: Do not operate the starter motor continuously for more than one minute. Allow a two-minute cool-off period before re-energizing the starter. (1) Remove pipe plug (F, fig. 6 245 or 8-1), purge system and bleed the secondary fuel filter or water separator filter to remove trapped air. Install pipe plug. (2) Crank the engine several revolutions with the fuel shutoff switch in the “OFF” position to make certain the engine is not hydrostatically locked and is otherwise free. (3) Turn on the master switch. (4) Start engine by operating electric starting motor with throttle in idle position (Refer to Caution, above.) (5) When engine oil pressure does not reach the minimum 15 psi pressure within 20 seconds, STOP THE ENGINE IMMEDIATELY by holding the fuel shutoff switch in the “OFF” position. Determine the cause of low pressure. Refer to troubleshooting, paragraph 3-9. Note. After starting engine, run at idle, 675 to 725 rpm, for five minutes to permit the engine to warm up and to circulate the oil. Check oil level and add sufficient oil to bring oil level to “FULL” mark on oil level gage. Oil level must be determined with engine idling. Check all items vital to safe engine operation, such as fuel lines, oil lines, oil pressure, throttle control, mounting bolts, coupling, thermocouple harness, etc. d. Run-in Schedule. An overhauled engine should be started and tested in accordance with the schedule (table 8-1). e. Performance Curve. Figure 8-3 is a mean performance curve. A variation of 2 is acceptable. 8-5